Wheatstone Bridge NEET Questions

Physics - Current Electricity

Wheatstone Bridge MCQ Questions


7.
Wheatstone bridge is a:
A.
Substitution method
B.
Comparison-of-current method
C.
Null/zero-deflection method
D.
Deflection method
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ANSWER :
C. Null/zero-deflection method
8.
If three arms of a Wheatstone bridge are P = 2 Ω, Q = 4 Ω, R = 3 Ω, then for balance the fourth arm S is:
A.
6 Ω
B.
8 Ω
C.
1.5 Ω
D.
12 Ω
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ANSWER :
A. 6 Ω
9.
If three arms of a Wheatstone bridge are P = 10 Ω, Q = 100 Ω, R = 5 Ω, then S for balance is:
A.
50 Ω
B.
1 Ω
C.
0.5 Ω
D.
10 Ω
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ANSWER :
A. 50 Ω
10.
If three arms of a Wheatstone bridge are P = 100 Ω, Q = 10 Ω, R = 4 Ω, then for balance S equals:
A.
0.4 Ω
B.
40 Ω
C.
400 Ω
D.
4 Ω
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ANSWER :
A. 0.4 Ω
11.
A Wheatstone bridge is balanced. If the cell and galvanometer are interchanged, the bridge:
A.
Indicates a wrong value of R
B.
Stays balanced
C.
Becomes unbalanced
D.
Cannot work
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ANSWER :
B. Stays balanced
12.
A Wheatstone bridge is most sensitive when:
A.
The EMF is very low
B.
The galvanometer has zero resistance
C.
All four resistances are nearly equal
D.
The arms are very different
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ANSWER :
C. All four resistances are nearly equal