Work, Energy and Power UPSC Questions

Physics

Work, Energy and Power MCQ Questions


7.
Which of the physical quantity is/are a vector ?
A.
Displacement
B.
Velocity
C.
Acceleration
D.
All the above
😑 View Answer Rough Work Error
ANSWER :
D. All the above
8.
A ball moves in a frictionless inclined table without slipping. The work done by the table surface on the ball is
A.
Positive
B.
Negative
C.
Zero
D.
Infinity
😑 View Answer Rough Work Error
ANSWER :
C. Zero
9.
When can one say that work is done on the body
A.
When the body is stationary
B.
When there is an increase in energy because of mechanical influence
C.
When the body moves a certain distance
D.
When the body experiences force
😑 View Answer Rough Work Error
ANSWER :
B. When there is an increase in energy because of mechanical influence
10.

Which of the following statement about work is true ?
(i) Work is done by a force on the body over a certain displacement
(ii) In case of work-energy (WE) theorem - The change in kinetic energy of a particle is equal to the work done on it by the net force
(iii) No work is done if the displacement is zero
(iv) The work and energy have same dimensions

A.

(i) and (ii) only

B.

(ii) and (iii) only

C.

(i), (ii) and (iv) only

D.

All the above

😑 View Answer Rough Work Error
ANSWER :

D. All the above

11.
The rate of doing work is called
A.
Force
B.
Power
C.
Acceleration
D.
Displacement
😑 View Answer Rough Work Error
ANSWER :
B. Power
12.

Which of the physical quantities have the dimension ML2T-2

A.

Mechanical energy

B.

Kinetic energy

C.

Potential energy

D.

All the above

😑 View Answer Rough Work Error
ANSWER :

D. All the above