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.
In the metre bridge, the resistance box is placed in:
A.
In the wire itself
B.
Across the galvanometer
C.
One of the two gaps between the L-shaped strips
D.
Across the battery
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ANSWER :
C. One of the two gaps between the L-shaped strips
14.
The galvanometer in the metre bridge is connected between:
A.
Across the resistance box only
B.
Across the wire only
C.
The battery and ammeter
D.
The middle terminal (between the two gap resistors) and the jockey on the wire
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ANSWER :
D. The middle terminal (between the two gap resistors) and the jockey on the wire
15.
The jockey is:
A.
A sliding contact (knife-edge) that touches the wire at any chosen point
B.
A type of battery
C.
A type of resistor
D.
A galvanometer needle
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ANSWER :
A. A sliding contact (knife-edge) that touches the wire at any chosen point
16.
Why is the jockey only tapped, not pressed continuously, on the wire?
A.
It saves the battery
B.
Continuous pressure would damage the wire and cause local heating, changing its resistance
C.
It is required by the formula
D.
It looks dramatic
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ANSWER :
B. Continuous pressure would damage the wire and cause local heating, changing its resistance
17.
In the metre bridge, the balance point is found when:
A.
The galvanometer shows maximum deflection
B.
The voltmeter shows maximum
C.
The ammeter shows zero
D.
The galvanometer shows null deflection (zero current)
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ANSWER :
D. The galvanometer shows null deflection (zero current)
18.
The role of the battery in the metre bridge experiment is to:
A.
Heat the wire
B.
Provide voltage to the galvanometer only
C.
Drive a current through the bridge so that there is a measurable galvanometer deflection at off-balance
D.
Determine the resistance directly
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ANSWER :
C. Drive a current through the bridge so that there is a measurable galvanometer deflection at off-balance