# Important Physics MCQs-2

## Important Physics MCQs-2

1 ._________ is the SI unit of solid angle.

A. candela

C. degree

E. revolution

B

2. Unit of the amount of substance is

A.Â  mole

B. joule

D. amount of substance

E. intensity of light

A

3. How can we reduce random errors

A. comparing the instrument with another more accurate one

B. taking mean of several measurements

C.Â taking zero correction

D. all A, B, and C are correct

E. none of the above

C

4. The solid angle is represented by

A. cd

C. sr

D. none of the above

C

5. scalar physical quantity is completely specified byÂ

A. a number with proper units

B. a direction only

C. a number only

D. a number with a direction

A

6. which of the following is an example of the scalar quantity

A. velocity

B. torque

C. acceleration

D. energy

E. speed

D

7. which of the following is the vector quantity

A. charge

B. impulse

C.Â density

D. power

B

8. There are two forces 5N and 12N making an angleÂ 90Â° with each other is,

A. 14N

B. 15N

C. 7N

D. 17N

E. 13N

E

9. What is the angle between two rectangular components of any vector?.

A.Â 90Â°

B. 180Â°

C. 50Â°

D.Â 30Â°

A

10. Torque is also defined as

A. moment of inertia

B. moment of force

C. angular velocity

D. moment of arm

E. none of the above

B

11. what will be the angle___ when the Dot product of two non-zero vectors is zero.

A. 180Â°

B. 90Â°

C. 30Â°

D.Â 40Â°

A

12. Two vectors is negative when the Scalar product is

A. an anti-parallelÂ vector

B. a parallel vector

C. parallel with some magnitude

D. a perpendicular vector