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


1.
The metre bridge works on the principle of which electrical law?
A.
Ohm’s Law
B.
Joule’s Law
C.
Kirchhoff’s Law
D.
Faraday’s Law
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ANSWER :
C. Kirchhoff’s Law
2.
In a metre bridge experiment, the unknown resistance is found using which equation?
A.
R = (100 - l)/l × S
B.
R = l/(100 - l) × S
C.
R = (100 - l)/l × ρ
D.
R = ρl/A
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ANSWER :
A. R = (100 - l)/l × S
3.
What is the primary advantage of using a metre bridge to measure resistance?
A.
It is simple to perform
B.
It is more accurate
C.
It eliminates contact resistance
D.
It allows quick measurements
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ANSWER :
B. It is more accurate
4.
If the balancing length in a metre bridge experiment is 40 cm, what is the ratio of the unknown resistance to the known resistance?
A.
2:3
B.
3:2
C.
1:1
D.
1:3
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ANSWER :
B. 3:2
5.
The metre bridge is most accurate when the balancing length is:
A.
Near 50 cm
B.
Near 25 cm
C.
Near 75 cm
D.
Near 90 cm
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ANSWER :
A. Near 50 cm
6.
What happens to the balancing length if the resistance of the unknown wire is increased?
A.
Increases
B.
Decreases
C.
Remains constant
D.
Becomes zero
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ANSWER :
A. Increases