One Point Solution for All JKSSB Exams

1. The Michelson–Morley experiment was designed to show :

The difference in the speed of light between directions parallel and perpendicular to the Earth’s motion

The speed of light in vacuum is not invariant

That Galilean transformation equations are valid for the speed of light to be invariant

None of the above

Wave Physics KU Physics 2021

Correct Answer: A
Explanation

Correct Answered :

Wrong Answered :

2. In free space, the Poisson equation for electrostatics becomes :

The Maxwell’s equation.

The Laplace equation

The steady state continuity equation

The Ampere’s circuital law

Electrostatics KU Physics 2021

Correct Answer: B
Explanation

In free space, the Poisson equation for electrostatics is given by: ∇²V(r) = - ρ(r) / ε₀ Where: V(r) is the electrostatic potential at a point in space ∇² is the Laplacian operator, representing the divergence of the gradient of the potential ρ(r) is the charge density at a point in space ε₀ is the electric constant, a fundamental physical constant with a value of approximately 8.854 x 10^-12 C^2/Nm^2. but charge density is 0 in free space so we are left with Laplace equation

Correct Answered :

Wrong Answered :

3. An astronaut sees two spaceships flying apart with speed 0.99c. The speed of one spaceship as viewed by the other nearly is :

(A) 0.99995c

(B) c

(D) 0 c

Relativity KU Physics 2021

Correct Answer: A
Explanation

Va|b = (Va - Vb)/(1 + Va*Vb/c^2)

Correct Answered :

Wrong Answered :

4. The graph of the function as shown in Fig.1 is best described by :

e^x* cos(x)

e^–x *cos(x)

e^x *sin(x)

e^ –x *sin(x)

Functions KU Physics 2021

Correct Answer: C
Explanation

Correct Answered :

Wrong Answered :

5. Choose the incorrect statement :

If total linear momentum of a system of particles is zero, the angular momentum of the system is the same around all origins

Even if total linear momentum of a system of particles is not zero, the angular momentum of the system is same around all origins

If the total force on a system of particles is zero, the torque on the system is the same around all origins

When a rigid body rotates around an axis, every particle in the body remains at a fixed distance from the axis

Classical Mechanics KU Physics 2021

Correct Answer: B
Explanation

Correct Answered :

Wrong Answered :

6. If F is the time-dependent force F = A – Bt, where A and B are positive constants, the velocity v(t) in terms of A, B, m (mass), v0 (initial velocity) and x0 (initial position) is given by :

v(t) = v0 + At /m – B t2 /2m

v(t) = v0 + At2 /m – B t/2m

v(t) = v0 + B t2 /2m

v(t) = v0 – B t2 /2m

Classical Mechanics KU Physics 2021

Correct Answer: A
Explanation

Correct Answered :

Wrong Answered :

7. How far approximately will a small boat move, when a man with mass 64 kg moves from back to front of the boat ? Given that length of boat is 2.7 m, its mass is 92 kg. (Water resistance and tilt of the boat is negligible)

1.03 m

1.40 m

2.74 m

1.10 m

Classical Mechanics KU Physics 2021

Correct Answer: D
Explanation

center of mass will remain at same point

Correct Answered :

Wrong Answered :

8. A particle moves in a circular orbit with the potential energy U(r) = –A/r^n , where A > 0. For what values of ‘n’ are the circular orbits stable :

n > 2

n <= 2

Only for n = 2

Only for n = 1

Classical Mechanics KU Physics 2021

Correct Answer: B
Explanation

Correct Answered :

Wrong Answered :

9.
A particle of mass ‘m’ is located in the y-z plane at x = 0, y = 3, z =3. Its moment and products of inertia relative to the origin written in the form of an Inertia matrix are :

Classical Mechanics KU Physics 2021

Correct Answer: A
Explanation

Correct Answered :

Wrong Answered :

10. A marble of mass 0.1 kg and radius 0.25 m is rolled up a plane of angle 30 degree . If the initial velocity of the marble is 2 m/s, the distance ‘d’ it travels up the plane before it begins to roll back down is equal to :

4 m

4/5 m

4/7 m

4/9 m

Classical Mechanics KU Physics 2021

Correct Answer: C
Explanation

Correct Answered :

Wrong Answered :

11. A thin sheet of mass M is in the shape of an equilateral triangle with side L. The moment of inertia around an axis through a vertex, perpendicular to the sheet is :

5/7 ML^2

5/12 ML^2

5/9 ML^2

1/2 ML^2

Classical Mechanics KU Physics 2021

Correct Answer: B
Explanation

Correct Answered :

Wrong Answered :

12.
If a force F is derivable from a potential function V(r),
where r is the distance from the origin of the coordinate
system, it follows that :

∇ × F = 0

∇· F = 0

∇V=0

∇^2 V=0

Classical Mechanics KU Physics 2021

Correct Answer: A
Explanation

Correct Answered :

Wrong Answered :

KU Physics 2021 Examination MCQs with solutions

1. The Michelson–Morley experiment was designed to show :

2. In free space, the Poisson equation for electrostatics becomes :

3. An astronaut sees two spaceships flying apart with speed 0.99c. The speed of one spaceship as viewed by the other nearly is :

4. The graph of the function as shown in Fig.1 is best described by :

5. Choose the incorrect statement :

6. If F is the time-dependent force F = A – Bt, where A and B are positive constants, the velocity v(t) in terms of A, B, m (mass), v0 (initial velocity) and x0 (initial position) is given by :

7. How far approximately will a small boat move, when a man with mass 64 kg moves from back to front of the boat ? Given that length of boat is 2.7 m, its mass is 92 kg. (Water resistance and tilt of the boat is negligible)

8. A particle moves in a circular orbit with the potential energy U(r) = –A/r^n , where A > 0. For what values of ‘n’ are the circular orbits stable :

9.
A particle of mass ‘m’ is located in the y-z plane at x = 0, y = 3, z =3. Its moment and products of inertia relative to the origin written in the form of an Inertia matrix are :

10. A marble of mass 0.1 kg and radius 0.25 m is rolled up a plane of angle 30 degree . If the initial velocity of the marble is 2 m/s, the distance ‘d’ it travels up the plane before it begins to roll back down is equal to :

11. A thin sheet of mass M is in the shape of an equilateral triangle with side L. The moment of inertia around an axis through a vertex, perpendicular to the sheet is :

12.
If a force F is derivable from a potential function V(r),
where r is the distance from the origin of the coordinate
system, it follows that :

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KU Physics 2021 Examination MCQs with solutions

1. The Michelson–Morley experiment was designed to show :

2. In free space, the Poisson equation for electrostatics becomes :

3. An astronaut sees two spaceships flying apart with speed 0.99c. The speed of one spaceship as viewed by the other nearly is :

4. The graph of the function as shown in Fig.1 is best described by :

5. Choose the incorrect statement :

6. If F is the time-dependent force F = A – Bt, where A and B are positive constants, the velocity v(t) in terms of A, B, m (mass), v0 (initial velocity) and x0 (initial position) is given by :

7. How far approximately will a small boat move, when a man with mass 64 kg moves from back to front of the boat ? Given that length of boat is 2.7 m, its mass is 92 kg. (Water resistance and tilt of the boat is negligible)

8. A particle moves in a circular orbit with the potential energy U(r) = –A/r^n , where A > 0. For what values of ‘n’ are the circular orbits stable :

9. A particle of mass ‘m’ is located in the y-z plane at x = 0, y = 3, z =3. Its moment and products of inertia relative to the origin written in the form of an Inertia matrix are :

10. A marble of mass 0.1 kg and radius 0.25 m is rolled up a plane of angle 30 degree . If the initial velocity of the marble is 2 m/s, the distance ‘d’ it travels up the plane before it begins to roll back down is equal to :

11. A thin sheet of mass M is in the shape of an equilateral triangle with side L. The moment of inertia around an axis through a vertex, perpendicular to the sheet is :

12. If a force F is derivable from a potential function V(r),where r is the distance from the origin of the coordinatesystem, it follows that :

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9.
A particle of mass ‘m’ is located in the y-z plane at x = 0, y = 3, z =3. Its moment and products of inertia relative to the origin written in the form of an Inertia matrix are :

12.
If a force F is derivable from a potential function V(r),
where r is the distance from the origin of the coordinate
system, it follows that :