The Resistivity of the Material of a Given Wire Using a Metre Bridge NEET Questions

Physics - Experimental Skills

The Resistivity of the Material of a Given Wire Using a Metre Bridge MCQ Questions


13.
What is the SI unit of resistivity?
A.
Ohm-meter
B.
Ohm
C.
Volt-meter
D.
Ampere-meter
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ANSWER :
A. Ohm-meter
14.
Which factor affects the resistivity of a given material?
A.
Length of wire
B.
Cross-sectional area
C.
Temperature
D.
External voltage
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ANSWER :
C. Temperature
15.
If the balancing length is measured incorrectly, the resistivity calculation will be:
A.
Underestimated
B.
Overestimated
C.
Unaffected
D.
Completely incorrect
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ANSWER :
B. Overestimated
16.
A longer wire in a metre bridge experiment will:
A.
Decrease its sensitivity
B.
Increase resistance
C.
Increase its sensitivity
D.
Have no effect
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ANSWER :
C. Increase its sensitivity
17.
In a metre bridge experiment, what would be the effect of using a wire with a larger cross-sectional area?
A.
Reduce its sensitivity
B.
Increase sensitivity
C.
No effect
D.
Increase the wire’s resistance
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ANSWER :
B. Increase sensitivity
18.
A student repeats the metre bridge experiment using a wire of different material. What will change?
A.
Resistivity remains the same
B.
Resistivity changes
C.
Only resistance changes
D.
Both resistance and resistivity change
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ANSWER :
D. Both resistance and resistivity change