Given below are two statements:Statement I: All moving objects, by virtue of their motion, are capable of doing work.Statement II: Potential energy is the energy of motion.In the light of the above statements, choose the correct answer from the options given below:

Statement I is incorrect but Statement II is true

Both Statement I and Statement II are true

Both Statement I and Statement II are false

Statement I is correct but Statement II is false

Statement I is incorrect but Statement II is true

A cube has side L0 when at rest. If the cube moves with velocity V parallel to its one edge then its volume becomes

\(L_0^3{\left[ {1 - \left( {\frac{{{V^2}}}{{{C^2}}}} \right)} \right]^{ - \frac{1}{2}}}\)

\(L_0^3\left[ {1 - \left( {\frac{{{V^2}}}{{{C^2}}}} \right)} \right]\)

\(L_0^3{\left[ {1 - \left( {\frac{{{V^2}}}{{{C^2}}}} \right)} \right]^{\frac{1}{2}}}\)

Explore topic-wise MCQs in Physics.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.

1.	An arrow measure 1 m in length at rest. It is launched at a relativistic velocity of 80% of the velocity of light. What is the length of the arrow due to Lorentz-Fitzgerald contraction as measured by an observer, to whom the arrow is in motion?
A.	0.60 m
B.	1.66 m
C.	0.20 m
D.	5.0 m
Answer» B. 1.66 m

Discussion

2.	In Einstein's mass-energy equivalence relation E = mc2, 'c' stands for?
A.	Planck constant
B.	elementary charge
C.	atomic mass constant
D.	speed of light
Answer» E.

Discussion

3.	A metre stick move along its length with a certain speed. The apparent length of the moving metre stick as measured by a stationary observer on the ground is found to be 98 cm. Then, the velocity of the meter stick in terms of the speed of light in vacuum c will be:
A.	0.17 c
B.	0.19 c
C.	0.98 c
D.	0.14 c
Answer» C. 0.98 c

Discussion

4.	If the momentum of an object increases by 20%, its kinetic energy will increase by ______.
A.	66%
B.	77%
C.	44%
D.	55%
Answer» D. 55%

Discussion

5.	If the electric and magnetic fields (E and B respectively) are perpendicular to each other and also perpendicular to the velocity v of a charged particlethen the particles with velocity equal to _______ will pass through undeviated.
A.	E/B
B.	B/E
C.	√(E/B)
D.	√(B/E)
Answer» B. B/E

Discussion

6.	A body is falling freely under the action of gravity alone in vacuum. Which of the following quantities remains constant during the fall?
A.	Kinetic energy
B.	Potential energy
C.	Total mechanical energy
D.	Total linear momentum
Answer» D. Total linear momentum

Discussion

7.	Given below are two statements:Statement I: All moving objects, by virtue of their motion, are capable of doing work.Statement II: Potential energy is the energy of motion.In the light of the above statements, choose the correct answer from the options given below:
A.	Both Statement I and Statement II are true
B.	Both Statement I and Statement II are false
C.	Statement I is correct but Statement II is false
D.	Statement I is incorrect but Statement II is true
Answer» D. Statement I is incorrect but Statement II is true

Discussion

8.	If the linear momentum of a moving object gets doubled due to application of a force, then its kinetic energy will
A.	remain same
B.	to increase by four times
C.	to increase by two times
D.	to increase by eight times
Answer» C. to increase by two times

Discussion

9.	A cube has side L0 when at rest. If the cube moves with velocity V parallel to its one edge then its volume becomes
A.	\(L_0^3\)
B.	\(L_0^3{\left[ {1 - \left( {\frac{{{V^2}}}{{{C^2}}}} \right)} \right]^{ - \frac{1}{2}}}\)
C.	\(L_0^3\left[ {1 - \left( {\frac{{{V^2}}}{{{C^2}}}} \right)} \right]\)
D.	\(L_0^3{\left[ {1 - \left( {\frac{{{V^2}}}{{{C^2}}}} \right)} \right]^{\frac{1}{2}}}\)
Answer» E.

Discussion

Explore topic-wise MCQs in Physics.

An arrow measure 1 m in length at rest. It is launched at a relativistic velocity of 80% of the velocity of light. What is the length of the arrow due to Lorentz-Fitzgerald contraction as measured by an observer, to whom the arrow is in motion?

In Einstein's mass-energy equivalence relation E = mc2, 'c' stands for?

A metre stick move along its length with a certain speed. The apparent length of the moving metre stick as measured by a stationary observer on the ground is found to be 98 cm. Then, the velocity of the meter stick in terms of the speed of light in vacuum c will be:

If the momentum of an object increases by 20%, its kinetic energy will increase by ______.

If the electric and magnetic fields (E and B respectively) are perpendicular to each other and also perpendicular to the velocity v of a charged particlethen the particles with velocity equal to _______ will pass through undeviated.

A body is falling freely under the action of gravity alone in vacuum. Which of the following quantities remains constant during the fall?

Given below are two statements:Statement I: All moving objects, by virtue of their motion, are capable of doing work.Statement II: Potential energy is the energy of motion.In the light of the above statements, choose the correct answer from the options given below:

If the linear momentum of a moving object gets doubled due to application of a force, then its kinetic energy will

A cube has side L0 when at rest. If the cube moves with velocity V parallel to its one edge then its volume becomes