A
a type of tank
B
study of materials and phenomena at low temperature
C
study of radioactive elements
D
none of the above
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 :
A
only i and iii
B
ii only
C
iii only
D
only i and ii
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 :
A
10-15 cm
B
10-15 m
C
10-12 m
D
10-10 m
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 :
A
M-1L-2T4
B
M2L-2T2
C
M-1L-1T3
D
M1L-1T-2
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 :
A
zero
B
small but positive
C
small and negative
D
very large
small and negative
Correct Answered :
Wrong Answered :
A
cos-1(v2 / rg)
B
tan-1(v2 / rg)
C
tan-1(v2 / 2rg)
D
cos-1(v2 / rg)1/2
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 :
A
SY/4
B
SY/2
C
S2/2Y
D
2S/Y
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 :
A
1/6
B
1/9
C
1/8
D
1/5
A
10i - 12j
B
9i - 12j
C
12i - 9j
D
12i - 10j
9i - 12j
Correct Answered :
Wrong Answered :
A
1/8
B
1/9
C
1/2
D
1/3
1/9
Number of half lives,
n = t/T = 2400/800 = 3
N/No = (1/2)3=1/8
Correct Answered :
Wrong Answered :
A
100π
B
200π
C
400π
D
300π
A
120 Hz
B
2 Hz
C
12 Hz
D
60 Hz
Frequency is nothing but beats / second thus the answer will be 120/60 = 2 Hz
Correct Answered :
Wrong Answered :
A
Resistance is too low
B
Voltage is too high
C
Circuit is open
D
Circuit is closed
Circuit is open
Correct Answered :
Wrong Answered :
A
Time
B
Acceleration
C
Mass
D
Velocity
(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 :
A
Acceleration
B
Average Speed
C
Instantaneous speed
D
Velocity
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 :
A
Tidal Energy
B
Wave Energy
C
Hydel Energy
D
Energy from power plant
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 :
A
1 Ohm
B
1 Ampere
C
1 Volt
D
1 Watt
1 Ampere is the current is defined as flow of 1 coulomb charge through a conductor in 1 second
Correct Answered :
Wrong Answered :
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
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 :
A
Loudness
B
Rhythm
C
Pitch
D
Intensity
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 :
A
focus
B
vertex
C
centre of curvature
D
pole
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 :
A
Oxygen and Nitrogen
B
Methane and Carbon Dioxide
C
Argon and Helium
D
Hydrogen and Xenon
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 :
A
Rotor
B
Nacelle
C
Generator
D
Controller
The nacelle sits atop the tower and contains the gearbox, low- and high-speed shafts, generator, and brake
Correct Answered :
Wrong Answered :
A
Virtual and erect
B
real and errect
C
real and inverted
D
virtual and inverted
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 :
A
scattering
B
dispersion
C
reflection
D
deviation
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 :
A
1D
B
2D
C
3D
D
4D
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=f1f=3100=0.33mpower=f(inmetres)1=+3.0D
Correct Answered :
Wrong Answered :
A
Myopia
B
Presbyopia
C
Hypermetropia
D
Astigmatism
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 :
A
Sclera
B
fovea
C
Ciliary muscles
D
pupil
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 :
A
Coal
B
Crude Oil
C
Natural Gas
D
Gasoline
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 :
A
Ultraviolet rays
B
Infrared rays
C
Microwaves
D
Gamma rays
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 :
A
Current
B
Resistance
C
Conductance
D
Voltage
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 :
A
Loudspeaker
B
Solar Cell
C
Wind Turbine
D
Microphone
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 :
A
Mho
B
S
C
Ohm
D
Ampere
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 :
A
Conservation of mass
B
Conservation of momentum
C
Conservation of angular momentum
D
Conservation of energy
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 :
A
Amplitude
B
Frequency
C
Pitch
D
Speed
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 :
A
Time
B
Speed
C
Distance
D
Luminosity
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 :
A
Natural gas
B
Petroleum
C
Wind Energy
D
Nuclear Energy
Wind Energy
Correct Answered :
Wrong Answered :
A
Momentum
B
Speed
C
Velocity
D
Force
A
Infrared Radiation
B
Alpha Radiation
C
Gamma Radiation
D
Beta Radiation
Gamma Radiation
Correct Answered :
Wrong Answered :
A
Linear Momentum
B
Weight
C
Energy
D
Angular Momentum
Energy
Correct Answered :
Wrong Answered :
A
Time
B
Acceleration
C
Velocity
D
Distance
Distance
Correct Answered :
Wrong Answered :
A
Current Density
B
Electrical Resistivity
C
Electrical Power
D
Electric Potential
Current Density
Correct Answered :
Wrong Answered :
A
Voltmeter
B
Galvanometer
C
Pycnometer
D
Ammeter
Voltmeter
Correct Answered :
Wrong Answered :
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
Newton`s Third Law of Motion
Correct Answered :
Wrong Answered :
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
Newton`s Second Law of Motion
Correct Answered :
Wrong Answered :
A
Resistance
B
Frequency
C
Capacitance
D
Inductance
Resistance
Correct Answered :
Wrong Answered :
A
Positron
B
Electron
C
Neutron
D
Proton
Neutron
Correct Answered :
Wrong Answered :
A
Watt
B
Hertz
C
Metre
D
Second
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 :
A
Gamma Rays
B
Micro Waves
C
Radio Waves
D
Alpha Waves
Radio Waves
Correct Answered :
Wrong Answered :
A
Momentum
B
Mass
C
Volume
D
Speed
Momentum
Correct Answered :
Wrong Answered :
A
Candela
B
Pascal
C
Mole
D
Ampere
Ampere
Correct Answered :
Wrong Answered :
A
Rhythm
B
Resonance
C
Acoustics
D
Announce
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 :
A
Shaving and Makeup Mirrors
B
Microscopes
C
Headlights
D
All of these
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 :
A
diminished
B
highly
C
enlarged
D
similar size
dimnished
Correct Answered :
Wrong Answered :
A
only 1
B
only 2
C
1 and 2
D
1, 2 and 3
1, 2 and 3
Correct Answered :
Wrong Answered :
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
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 :
A
Magnetoreception
B
Soundcall
C
Echolocation
D
None of these
Correct Answered :
Wrong Answered :
A
virtual and inverted
B
real and erect
C
real and inverted
D
virtual and erect
Image formation by a convex mirror when an object is placed at infinity: The image formed is virtual and erect.
Correct Answered :
Wrong Answered :
If Seismograph is related to Earthquake the, Taseometer is related to ___
A
Volcano
B
Stress
C
Current
D
None of these
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
Correct Answered :
Wrong Answered :
A
Mobile
B
Glucometer
C
Television
D
Radio
Glucometer
Correct Answered :
Wrong Answered :
A
kilowatt hour (kwh)
B
ampere (Ah)
C
voltage (Vh)
D
watt (Wh)
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 :
A
Graphite
B
Copper
C
Silver
D
All of these
All of these
Correct Answered :
Wrong Answered :
A
Amplitude
B
velocity
C
Refractive index
D
None of these
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 :