MCQs

Physics Questions with solutions MCQs

1. Cryogenics is

A

a type of tank

B

study of materials and phenomena at low temperature

C

study of radioactive elements

D

none of the above

Physics General Science
Correct Answer : B
Explanation :

Cryogenics is the science that addresses the production and effects of very low temperatures. The word originates from the Greek words kryos meaning "frost" and genic meaning "to produce."

Correct Answered :

Wrong Answered :

2. The heat received by a person sitting in front of a fire is due to which of the following mode(s) of heat of transfer?
i) Conduction
ii) Convection
iii) Radiation

A

only i and iii

B

ii only

C

iii only

D

only i and ii

Physics General Science
Correct Answer : C
Explanation :

Radiation refers to the emission of energy in rays or waves. Heat moves through space as energy waves. It is the type of heat one feels when sitting in front of a fireplace or around a campfire. It travels in straight lines at the speed of light.

Correct Answered :

Wrong Answered :

3. 1 Fermi is equal to

A

10-15 cm

B

10-15 m

C

10-12 m

D

10-10 m

Physics General Science
Correct Answer : B
Explanation :

Fermi, sometimes also referred to as Femtometer, is a unit of length in the SI unit. One Fermi is a very small length. It is equal to 10-15 of a meter. Being such a small unit of length, Fermi is used in the measure of really small distances in nuclear science.

Correct Answered :

Wrong Answered :

4. The dimensional formula for modulus of rigidity is

A

M-1L-2T4

B

M2L-2T2

C

M-1L-1T3

D

M1L-1T-2

Physics General Science
Correct Answer : D
Explanation :

Modulus of rigidity is the ratio of shear stress to the shear strain.
η = strain / stress
Strain is dimensionless, where as Stress has the dimensions of Pressure.
Stress = F / a Stress = MLT-2 / L2 Stess = ML-1T-2

Correct Answered :

Wrong Answered :

5. Susceptibility of a diamagnetic substance is

A

zero

B

small but positive

C

small and negative

D

very large

Physics General Science
Correct Answer : C
Explanation :

small and negative

Correct Answered :

Wrong Answered :

6. What is the angle through which cyclist should bend to avoid skidding during a turn?

A

cos-1(v2 / rg)

B

tan-1(v2 / rg)

C

tan-1(v2 / 2rg)

D

cos-1(v2 / rg)1/2

Physics General Science
Correct Answer : B
Explanation :

The angle through which a cyclist has to bend himself, to prevent overturning himself is given by tan-1(v2 / rg) Where v is its linear velocity, R is the radius of the turn and g is the acceleration due to gravity.

Correct Answered :

Wrong Answered :

7. The elastic energy stored per unit volume of the material, when its young`s modulus Y is subjected to stress S is

A

SY/4

B

SY/2

C

S2/2Y

D

2S/Y

Physics General Science
Correct Answer : C
Explanation :

Given,
Young`s modulus =Y,
Streaching stress=S,
Energy stored per unit volume is, = 1/2 x stress x strian
We know that, stress = strain x Y
Therefore energy per unit volume will be E = 1/2 x S x S/Y = S2 / 2Y

Correct Answered :

Wrong Answered :

8. What is the ratio of ionization energy of bohr`s hydrogen atom and hydrogen like lithium atom?

A

1/6

B

1/9

C

1/8

D

1/5

Physics General Science
Correct Answer : B
Explanation :

1/9

Correct Answered :

Wrong Answered :

9. What will be the velocity after 6 seconds, if a 0.2kg object at rest is subjected to a force (0.3i - 0.4j)N?)

A

10i - 12j

B

9i - 12j

C

12i - 9j

D

12i - 10j

Physics General Science
Correct Answer : B
Explanation :

9i - 12j

Correct Answered :

Wrong Answered :

10. A radioactive element has a half-life period of 800 years. After 2400 years, what amount of the radioactive element will remain?

A

1/8

B

1/9

C

1/2

D

1/3

Physics General Science
Correct Answer : A
Explanation :

1/9 Number of half lives,
n = t/T = 2400/800 = 3
N/No = (1/2)3=1/8

Correct Answered :

Wrong Answered :

11. The wheel of toy car rotates about axis and slows down from 200 rps to 10 rps in 2s. What is tis angular retardation?

A

100π

B

200π

C

400π

D

300π

Physics General Science
Correct Answer : A
Explanation :

100π

Correct Answered :

Wrong Answered :

12. What is the frequency of beat, if the pulse rate of a man is 120 beats in one minute?

A

120 Hz

B

2 Hz

C

12 Hz

D

60 Hz

Physics General Science
Correct Answer : B
Explanation :

Frequency is nothing but beats / second thus the answer will be 120/60 = 2 Hz

Correct Answered :

Wrong Answered :

13. If the current in a circuit equals 0 A, it is likely that the

A

Resistance is too low

B

Voltage is too high

C

Circuit is open

D

Circuit is closed

Physics General Science
Correct Answer : C
Explanation :

Circuit is open

Correct Answered :

Wrong Answered :

14. Which one of the following physical quantities of an object is specified by its speed and direction?

A

Time

B

Acceleration

C

Mass

D

Velocity

Physics General Science
Correct Answer : D
Explanation :

(a) Displacement is a vector quantity, whereas distance is a scalar quantity.
(b) The physical quantity that includes both the speed and direction of the motion of a body is called its velocity

Correct Answered :

Wrong Answered :

15. The speedometer of a vehicle shows which one of the following?

A

Acceleration

B

Average Speed

C

Instantaneous speed

D

Velocity

Physics General Awareness
Correct Answer : C
Explanation :

The speedometer on your car shows your Instanteous speed. Instantaneous speed is the speed of the car at a particular instant.

Correct Answered :

Wrong Answered :

16. Foating generators are used in a sea to harness

A

Tidal Energy

B

Wave Energy

C

Hydel Energy

D

Energy from power plant

Physics General Awareness
Correct Answer : B
Explanation :

Wave power is the transport of energy by the wind. A machine able to exploit wave power is generally known as a wave energy converter. Floating generators are used in the sea to harness wave energy.

Correct Answered :

Wrong Answered :

17. A charge of 1 coulomb passing any point in the circuit every second is equal to

A

1 Ohm

B

1 Ampere

C

1 Volt

D

1 Watt

Physics General Awareness
Correct Answer : B
Explanation :

1 Ampere is the current is defined as flow of 1 coulomb charge through a conductor in 1 second

Correct Answered :

Wrong Answered :

18. Hooke`s Law relates to the

A

Distance of a spiring stretches to the force applied to the spiring

B

Distance of a spring stretches to the mass of the spring

C

Distance of a spring stretches to the density of the spring

D

Density of a spring to the force applied to the spring

Physics General Awareness
Correct Answer : A
Explanation :

Hooke`s law, law of elasticity discovered by the English scientist Robert Hooke in 1660, which states that, for relatively small deformations of an object, the displacement or size of the deformation is directly proportional to the deforming force or load.

Correct Answered :

Wrong Answered :

19. The measure of "highness" or "lowerness" of a musical tone or sound is called

A

Loudness

B

Rhythm

C

Pitch

D

Intensity

Physics General Awareness
Correct Answer : C
Explanation :

Pitch, in music, position of a single sound in the complete range of sound. Sounds are higher or lower in pitch according to the frequency of vibration of the sound waves producing them

Correct Answered :

Wrong Answered :

20. A light ray will retrace its path after reflection for a spherical mirror when it passes through

A

focus

B

vertex

C

centre of curvature

D

pole

Physics General Science
Correct Answer : C
Explanation :

If a ray is incident normally on a point on the spherical reflecting surface, the angle of incidence, i=0. So, the angle of refraction, r=0. Therefore, the ray retraces its own path after reflection. And such a ray travels through the centre of curvature of the mirror.

Correct Answered :

Wrong Answered :

21. Biogas is a type of biofuel that is naturally produced from the decomposition of organic waste. Its main constituents are:

A

Oxygen and Nitrogen

B

Methane and Carbon Dioxide

C

Argon and Helium

D

Hydrogen and Xenon

Physics General Science
Correct Answer : B
Explanation :

Biogas is the mixture of gases produced by organic matter in the absence of oxygen (anaerobically), primarily consisting of methane and carbon dioxide. Biogas can be produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste or food waste.

Correct Answered :

Wrong Answered :

22. An enclosure that sits atop the wind turbine and contains the gear box, low speed shaft and high-speed shaft, generator, controller, and brake is called

A

Rotor

B

Nacelle

C

Generator

D

Controller

Physics General Science
Correct Answer : B
Explanation :

The nacelle sits atop the tower and contains the gearbox, low- and high-speed shafts, generator, and brake

Correct Answered :

Wrong Answered :

23. The negative magnitude of magnification indicates that the image is

A

Virtual and erect

B

real and errect

C

real and inverted

D

virtual and inverted

Physics General Science
Correct Answer : C
Explanation :

A negative magnification indicates that the image is inverted. If the object is placed closer to a converging lens than the focal length, the rays on the far side of the lens diverge. ... The virtual image is upright and the magnification is positive in this case.

Correct Answered :

Wrong Answered :

24. The phenomenon of splitting of white light into different colours is called

A

scattering

B

dispersion

C

reflection

D

deviation

Physics General Science
Correct Answer : B
Explanation :

Upon passage through the prism, the white light is separated into its component colors - red, orange, yellow, green, blue and violet. The separation of visible light into its different colors is known as dispersion.

Correct Answered :

Wrong Answered :

25. The near point of a hypermetropic eye is 1m. The power of the lens required to correct this defect is

A

1D

B

2D

C

3D

D

4D

Physics General Science
Correct Answer : C
Explanation :

In the problem, it is given that the near point of defective eye is 1 m and that of a normal eye is 25 cm. Hence u=−25 cm. The lens used forms its virtual image at near point of hypermetropic eye i.e., v=−1m=−100 cm. Using lens formula, we have :- v1​−u1​=f1​−1001​−−251​=f1​f=3100​=0.33mpower=f(inmetres)1​=+3.0D

Correct Answered :

Wrong Answered :

26. The normal loss of near focusing ability that occurs with age is known as

A

Myopia

B

Presbyopia

C

Hypermetropia

D

Astigmatism

Physics General Science
Correct Answer : B
Explanation :

Presbyopia is the gradual loss of your eyes ability to focus on nearby objects. It`s a natural, often annoying part of aging.

Correct Answered :

Wrong Answered :

27. For nearby objects, eye lens is contracted and squeezed into a more convex shape by

A

Sclera

B

fovea

C

Ciliary muscles

D

pupil

Physics General Science
Correct Answer : C
Explanation :

So for nearby objects, the ciliary muscles contract and squeeze the lens into a more convex shape. This increase in the curvature of the lens corresponds to a shorter focal length.

Correct Answered :

Wrong Answered :

28. Which of the following is a secondary fuel?

A

Coal

B

Crude Oil

C

Natural Gas

D

Gasoline

Physics General Science
Correct Answer : D
Explanation :

Image result for gasoline is a secondary fuel Secondary fuels are fuels that are derived from some primary fuel or fuels through chemical or physical processes. These are fuels that are not found as a natural resource. Gasoline is the best example of a secondary fuel, as it must be made from oil through distillation processes.

Correct Answered :

Wrong Answered :

29. Which radiation of sunlight is used in heating of a solar cooker?

A

Ultraviolet rays

B

Infrared rays

C

Microwaves

D

Gamma rays

Physics General Science
Correct Answer : B
Explanation :

Visible light rays cannot produce enough heat to cook food. So we can say that the infrared rays are the main reason for the working of a solar cooker, it provides a good amount of energy/heat to cook food using a solar cooker.

Correct Answered :

Wrong Answered :

30. Electric potential difference is known as

A

Current

B

Resistance

C

Conductance

D

Voltage

Physics General Science
Correct Answer : D
Explanation :

The unit of the electric potential difference is volt. One volt is defined as the one joule of energy is required to carry one coulomb of charge. Sometimes, the electric potential difference is referred to as voltage. Therefore, electric potential difference is also known as voltage

Correct Answered :

Wrong Answered :

31. Which of the following devices converts electrical energy to sound?

A

Loudspeaker

B

Solar Cell

C

Wind Turbine

D

Microphone

Physics General Science
Correct Answer : A
Explanation :

Electromechanical transducer, any type of device that either converts an electrical signal into sound waves (as in a loudspeaker) or converts a sound wave into an electrical signal (as in the microphone)

Correct Answered :

Wrong Answered :

32. what is unit of electrical resistance?

A

Mho

B

S

C

Ohm

D

Ampere

Physics General Science
Correct Answer : C
Explanation :

The unit of the electrical resistance, measured with direct current, is the ohm (abbreviated Ω), named after the German physicist and mathematician Georg Simon Ohm (1789-1854). According to ohm`s law, the resistance R is the ratio of the voltage U across a conductor and the current I flowing through it: R = U / I.

Correct Answered :

Wrong Answered :

33. Bernoulli`s principle is based on which one among the following laws?

A

Conservation of mass

B

Conservation of momentum

C

Conservation of angular momentum

D

Conservation of energy

Physics General Science
Correct Answer : D
Explanation :

Bernoulli’s principle states that The total mechanical energy of the moving fluid comprising the gravitational potential energy of elevation, the energy associated with the fluid pressure and the kinetic energy of the fluid motion, remains constant.

Correct Answered :

Wrong Answered :

34. Which attribute of sound wave is related to the loudness of sound?

A

Amplitude

B

Frequency

C

Pitch

D

Speed

Physics General Science
Correct Answer : A
Explanation :

The amplitude of a sound wave determines it relative loudness. In music, the loudness of a note is called its dynamic level. In physics, we measure the amplitude of sound waves in decibels (dB), which do not correspond with dynamic levels.

Correct Answered :

Wrong Answered :

35. Light year is a measure of

A

Time

B

Speed

C

Distance

D

Luminosity

Physics General Science
Correct Answer : C
Explanation :

Light-year is the distance light travels in one year. Light zips through interstellar space at 186,000 miles (300,000 kilometers) per second and 5.88 trillion miles (9.46 trillion kilometers) per year.

Correct Answered :

Wrong Answered :

36. Which of the following is source of renewable energy?

A

Natural gas

B

Petroleum

C

Wind Energy

D

Nuclear Energy

Physics General Science
Correct Answer : C
Explanation :

Wind Energy

Correct Answered :

Wrong Answered :

37. Which of the following quantities has only magnitude?

A

Momentum

B

Speed

C

Velocity

D

Force

Physics Sub Auditor 2021
Correct Answer : B
Explanation :

Speed

Correct Answered :

Wrong Answered :

38. Which of the following radiations has the highest penetrating power?

A

Infrared Radiation

B

Alpha Radiation

C

Gamma Radiation

D

Beta Radiation

Physics Sub Auditor 2021
Correct Answer : C
Explanation :

Gamma Radiation

Correct Answered :

Wrong Answered :

39. Which of the following quantities is conserved in Bernoulli`s theorem?

A

Linear Momentum

B

Weight

C

Energy

D

Angular Momentum

Physics Sub Auditor 2021
Correct Answer : C
Explanation :

Energy

Correct Answered :

Wrong Answered :

40. Light year is the unit of measurement of ___

A

Time

B

Acceleration

C

Velocity

D

Distance

Physics Sub Auditor 2021
Correct Answer : D
Explanation :

Distance

Correct Answered :

Wrong Answered :

41. The amount of electric current flowing per unit area is called ___

A

Current Density

B

Electrical Resistivity

C

Electrical Power

D

Electric Potential

Physics Sub Auditor 2021
Correct Answer : A
Explanation :

Current Density

Correct Answered :

Wrong Answered :

42. Which of the following devices is used to measure potential difference between two points in a circuit?

A

Voltmeter

B

Galvanometer

C

Pycnometer

D

Ammeter

Physics Sub Auditor 2021
Correct Answer : A
Explanation :

Voltmeter

Correct Answered :

Wrong Answered :

43. Which of the following laws states that for every action, there is an equal and opposite reaction?

A

Newton`s First Law of Motion

B

Newton`s Third Law of Motion

C

Newton`s Law of Cooling

D

Newton`s second Law of Motion

Physics Sub Auditor 2021
Correct Answer : B
Explanation :

Newton`s Third Law of Motion

Correct Answered :

Wrong Answered :

44. Which Newton`s law gives the relationship between force, mass and acceleration?

A

Newton`s Law of Cooling

B

Newton`s Second Law of Motion

C

Newton`s Third Law of Motion

D

Newton`s First Law of Motion

Physics Sub Auditor 2021
Correct Answer : B
Explanation :

Newton`s Second Law of Motion

Correct Answered :

Wrong Answered :

45. The electrical instrument rheostat is used to control electric current by varying the _________.

A

Resistance

B

Frequency

C

Capacitance

D

Inductance

Physics Sub Auditor 2021
Correct Answer : A
Explanation :

Resistance

Correct Answered :

Wrong Answered :

46. Which of the following particles has no electrical charge?

A

Positron

B

Electron

C

Neutron

D

Proton

Physics Sub Auditor 2021
Correct Answer : C
Explanation :

Neutron

Correct Answered :

Wrong Answered :

47. What is the SI unit of the wavelength?

A

Watt

B

Hertz

C

Metre

D

Second

Physics Sub Auditor 2021
Correct Answer : C
Explanation :

Wavelength is a distance so the meter is the SI unit, but wavelengths are small so are typically given in nano meters

Correct Answered :

Wrong Answered :

48. Which of the following has the lowest frequency in an electromagnetic spectrum?

A

Gamma Rays

B

Micro Waves

C

Radio Waves

D

Alpha Waves

Physics Sub Auditor 2021
Correct Answer : C
Explanation :

Radio Waves

Correct Answered :

Wrong Answered :

49. Which of the following is an example of vector quantity?

A

Momentum

B

Mass

C

Volume

D

Speed

Physics Sub Auditor 2021
Correct Answer : A
Explanation :

Momentum

Correct Answered :

Wrong Answered :

50. What is the SI unit of the electric current?

A

Candela

B

Pascal

C

Mole

D

Ampere

Physics Sub Auditor 2021
Correct Answer : D
Explanation :

Ampere

Correct Answered :

Wrong Answered :

51. The branch of Physics concerned with the properties of sound.

A

Rhythm

B

Resonance

C

Acoustics

D

Announce

Physics JKP SI 2022
Correct Answer : C
Explanation :

Acoustics is a branch of physics that deals with the study of mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound.

Correct Answered :

Wrong Answered :

52. For which of the following articles are Concave mirrors used ?

A

Shaving and Makeup Mirrors

B

Microscopes

C

Headlights

D

All of these

Physics JKPSI 2022 CBT
Correct Answer : D
Explanation :

Shaving mirrors, Car headlight mirror, Searchlight mirror, Driving mirror, Dentist`s inspection mirror, Torch mirror, Staircase mirror in a double-decker bus, Make-up mirror, Solar furnace mirror, Satellite TV dish, Shop security mirror.

Correct Answered :

Wrong Answered :

53. If in a concave mirror, the object is placed beyond the centre of curvature C, the size of the image will be ____.

A

diminished

B

highly

C

enlarged

D

similar size

Physics JKPSI 2022 CBT
Correct Answer : A
Explanation :

dimnished

Correct Answered :

Wrong Answered :

54. Which of the following is correctly matched?
1. Richter scale - Magnitude
2. Mercalli scale - Intensity
3. Intensity scale range - 1 to 12

A

only 1

B

only 2

C

1 and 2

D

1, 2 and 3

Physics JKPSI 2022 CBT VERIFIED
Correct Answer : D
Explanation :

1, 2 and 3

Correct Answered :

Wrong Answered :

55. Why does the clear sky appear blue?

A

blue light gets absorbed in the atmosphere

B

ultraviolet radiations are absorbed in the atmosphere

C

the short waves of blue light are scattered more than the other colours in the spectrum, making the blue light more visible

D

light of all other colours is scattered more than the violet and blue colour lights by the atmosphere

Physics JKPSI 2022 CBT
Correct Answer : C
Explanation :

The sky appears blue on a clear day because of the scattering of blue component of white sunlight by air molecules presents in the atmosphere. When sunlight passes through the atmosphere, most of the longer wavelength lights do not get scattered much and hence pass straight through the atmosphere.

Correct Answered :

Wrong Answered :

56. What is the ability used by some animals to emit high-pitched sounds and determine an object`s distance?

A

Magnetoreception

B

Soundcall

C

Echolocation

D

None of these

Physics JKPSI 2022 CBT
Correct Answer : C
Explanation :

Echolocation, also called bio sonar, is a biological sonar used by several animal species. Echolocating animals emit calls out to the environment and listen to the echoes of those calls that return from various objects near them. They use these echoes to locate and identify the objects.

Correct Answered :

Wrong Answered :

57. What will be the image formation by a convex mirror when object is at infinity?

A

virtual and inverted

B

real and erect

C

real and inverted

D

virtual and erect

Physics JKPSI 2022 CBT
Correct Answer : D
Explanation :

Image formation by a convex mirror when an object is placed at infinity: The image formed is virtual and erect.

Correct Answered :

Wrong Answered :

58. From the given options, Fill in the blank

If Seismograph is related to Earthquake the, Taseometer is related to ___


A

Volcano

B

Stress

C

Current

D

None of these

Physics JKPSI 2022 CBT
Correct Answer : B
Explanation :

Stress

Correct Answered :

Wrong Answered :

59. On what among the following factors does the resistance of wire depend?

A

directly proportional to the length of the conduction

B

inversely proportional to the cross sectional area of the conductor

C

depends on the material of the conductor

D

All of these

Physics JKPSI 2022 CBT
Correct Answer : D
Explanation :

Resistance is directly proportional to the length of a wire. Area of a cross-section of wire: Resistance is inversely proportional to the area of cross-section the wire. The temperature of the wire: Resistance of a wire is directly proportional to the temperature of the wire.

Correct Answered :

Wrong Answered :

60. Find the odd one out from the given options?

A

Mobile

B

Glucometer

C

Television

D

Radio

Physics JKPSI 2022 CBT
Correct Answer : B
Explanation :

Glucometer

Correct Answered :

Wrong Answered :

61. Which of the following is the commercial unit of electric energy which is commonly known as units in electricity bills

A

kilowatt hour (kwh)

B

ampere (Ah)

C

voltage (Vh)

D

watt (Wh)

Physics JKPSI 2022 CBT
Correct Answer : A
Explanation :

Commercial unit of electrical energy is kWh (kilowatt-hour). It is defined as energy consumed by an appliance of 1kW when it is used for one hour.

Correct Answered :

Wrong Answered :

62. Which among the following is/are good conductor of electricity?

A

Graphite

B

Copper

C

Silver

D

All of these

Physics JKPSI 2022 CBT
Correct Answer : D
Explanation :

All of these

Correct Answered :

Wrong Answered :

63. Which among the following is also called index of refraction, measure of the bending of a ray of light when passing from one medium into another?

A

Amplitude

B

velocity

C

Refractive index

D

None of these

Physics JKPSI 2022 CBT
Correct Answer : C
Explanation :

refractive index, also called index of refraction, measure of the bending of a ray of light when passing from one medium into another.

Correct Answered :

Wrong Answered :

CONTACT US

  • J & K

  • admin@prepmart.in

  • LIKE AND SHARE YOUR EXPERIENCE

    Like Us on Facebook Join Us on Telegram
    VISITORS COUNT 9 0 2 0 2 6
    Developed By : Azhar Rashid Teli