Moving Coil Galvanometer ( its sensitivity, and conversion to ammeter and voltmeter) NEET Questions

Physics - Magnetic Effects of Current and Magnetism

Moving Coil Galvanometer ( its sensitivity, and conversion to ammeter and voltmeter) MCQ Questions


1.
A moving coil galvanometer works on the principle that:
A.
A magnetic dipole in a field experiences torque
B.
A current-carrying conductor in a uniform magnetic field experiences a torque
C.
A changing magnetic flux induces EMF
D.
Parallel currents attract each other
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ANSWER :
B. A current-carrying conductor in a uniform magnetic field experiences a torque
2.
In a moving coil galvanometer, the restoring torque is provided by:
A.
Gravity
B.
Iron core
C.
Spring (torsional)
D.
Magnetic field
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ANSWER :
C. Spring (torsional)
3.
In equilibrium, the relation in a moving coil galvanometer is:
A.
kφ = NIAB
B.
NIAB = k²φ
C.
k = NIAB/φ²
D.
kφ² = NIAB
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ANSWER :
A. kφ = NIAB
4.
The deflection φ in a galvanometer is related to current I by:
A.
φ = I/(NAB)
B.
φ = NABI
C.
φ = kI
D.
φ = (NAB/k) I
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ANSWER :
D. φ = (NAB/k) I
5.
The current sensitivity of a moving coil galvanometer is defined as:
A.
Current per unit deflection (I/φ)
B.
Deflection per unit current (φ/I)
C.
Spring constant per unit current
D.
Deflection per unit voltage
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ANSWER :
B. Deflection per unit current (φ/I)
6.
The voltage sensitivity of a moving coil galvanometer is:
A.
φ/I
B.
φ/V = NAB/(kR)
C.
I/V
D.
V/φ
😑 View Answer Rough Work Error
ANSWER :
B. φ/V = NAB/(kR)