Work, Energy and Power UPSC Questions

Physics

Work, Energy and Power MCQ Questions


13.
What is the power utilised when work of 1000 J is done in 2 seconds?
A.
100 W
B.
200 W
C.
500 W
D.
1000 W
😑 View Answer Rough Work Error
ANSWER :
C. 500 W
14.
who proposed the mass energy relation ?
A.
JJ Thomson
B.
Albert Einstein
C.
Ernest Rutherford
D.
James chadwick
😑 View Answer Rough Work Error
ANSWER :
B. Albert Einstein
15.
A bullet fired from the rifle has_____
A.
Mechanical energy
B.
Kinetic energy
C.
Potential energy
D.
Chemical energy
😑 View Answer Rough Work Error
ANSWER :
B. Kinetic energy
16.
A body at rest breaks into two pieces of equal masses. The part will move
A.
In same direction
B.
Along Different lines
C.
In opposite directions with equal speeds
D.
In opposite directions with unequal speeds
😑 View Answer Rough Work Error
ANSWER :
C. In opposite directions with equal speeds
17.

Which of the following is true about energy ?
(i) An object having the capability to do work is said to possess energy
(ii) The energy of an object due to its position is the potential energy
(iii) According to law of conservation of energy, energy always remains constant (iv) When the height is increasing, potential energy will increase

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

18.
An electric generator converts
A.
Electrical energy into chemical energy
B.
Chemical energy into electrical energy
C.
Electrical energy into mechanical energy
D.
Mechanical energy into electrical energy
😑 View Answer Rough Work Error
ANSWER :
D. Mechanical energy into electrical energy