Physics MCQs from Books Chapter

1. What is the angle between F and d when the work done will be negative?
(A) 90°
(B) 180°
(C) 360°
(D) 45°

2. _______ is also called one joule per second.
(A) Newton
(B) Mass
(C) Watt
(D) Joule

3. When displacement and force are in the same direction, then what will be the work done?
(A) Minimum
(B) Zero
(C) 1
(D) 1

4. The dot product of ________ is also called power.
(A) F.t
(B) F.v
(C) F.d
(D) F.m

5. Which of the following principle of conservation is used for rocket working?
(A) Angular momentum
(B) Electricity
(C) Mass
(D) Energy

6. Which of the following is correct? If a body of mass 2 kg is raised vertically through 2 m, then the work done will be
(A) 39.2 J
(B) 390.2 J
(C) 38.2 J
(D) 392.1 J

7. Which of the following cell converts solar energy into electrical energy?
(A) Electromagnetic
(B) Galvanic
(C) Rotary
(D) Photovoltaic

8. Work is ___________ quantity.
(A) Fundamental
(B) Conservation
(C) Scalar
(D) Vector

9. When the ratio of work done to the smallest interval of time is known as ______
(A) Instantaneous power
(B) Instantaneous force
(C) Instantaneous acceleration
(D) Instantaneous velocity

10. What is the SI unit of energy?
(A) Joule
(B) J/s
(C) Watt
(D) erg

11. Which one is correct if velocity is doubled?
(A) Momentum increases 2 times and K.E remains constant
(B) Momentum increases 4 times and K.E 2 times
(C) Momentum increases 2 times and K.E increases 4 times
(D) Momentum and K.E remain the same

12. Both kinetic and potential energies are
(A) Two forms of torque
(B) Not inter-convertible
(C) Not related with each other
(D) Inter-convertible