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Physics Questions and Answers Section 3

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• Posted on 24/10/2023

1. Electrical conductivity of semiconductor:
A. Decrease with increased in temperature
B. Increased with increase in temperature
C. No change with increase in temperature
D. Firstly increase then decrease with increase in temperature

2. Magnetic susceptibility for water is:
A. Zero
B. Small positive number
C. Small negative number
D. Big negative number

3. The partical value poission ratio is possible:
A. 0.4
B. ­5
C. Greater than 0.5
D. Zero

4. In two dimensional motion the path of object moving with uniform
velocity is:
A. Zig ­ zag
B. Circular
C. Parabolic
D. Straight line

5. The resistively of a wire:
A. Varies with its length
B. Varies with its cross section
C. Varies with its mass
D. Does not depend on its length, cross section and mass

6. N­P­N transistor is better as compare to P­N­P transistor because:
A. It is cheaper
B. Low energy loss in it
C. More Electron flow in it
D. It has capacity to more tolerate

7. Surface tension is the property of:
A. Only in solid
B. Only in liquid
C. Only in gases
D. All liquid, solid and gases

8. Kirchhoff’s second law is based on the law of conservation of:
A. Momentum
B. Charge
C. Mass
D. Energy

9. A wire of resistance R is stretched to three times its length. Its new resistance will be:
A. 9R
B. 64R
C. R/4
D. 16R

10. Electron volt is a unit of:
A. Potential
B. Charge
C. Power
D. Energy