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

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

7.
A galvanometer can be converted into a voltmeter by

NEET - 2019

A.
Connecting a small resistance in parallel
B.
Connecting a large resistance in parallel
C.
Connecting a small resistance in series
D.
Connecting a large resistance in series
ANSWER :
D. Connecting a large resistance in series
8.
What is the role of a shunt resistance in converting a galvanometer into an ammeter?
A.
To decrease the effective resistance
B.
To increase the sensitivity
C.
To increase the effective resistance
D.
To divert excess current
ANSWER :
D. To divert excess current
9.
Which of the following modifications will decrease the sensitivity of a moving coil galvanometer?
A.
Increasing the torsional constant of the suspension wire
B.
Increasing the weight of the coil
C.
Decreasing the number of turns in the coil
D.
Increasing the mass of the coil
ANSWER :
A. Increasing the torsional constant of the suspension wire
10.
How does increasing the number of turns in the coil affect the sensitivity of a moving coil galvanometer?
A.
It increases the sensitivity
B.
It decreases the sensitivity
C.
It has no effect on sensitivity
D.
It makes the galvanometer unstable
ANSWER :
A. It increases the sensitivity
11.
A moving coil galvanometer works on the principle of

NEET - 2024

A.
Lorentz force on a current-carrying conductor
B.
Magnetic effect of current
C.
Electrostatic force on a charge in motion
D.
Force between parallel current-carrying conductors
ANSWER :
B. Magnetic effect of current
12.
What should be the resistance of a voltmeter to measure high voltages accurately?
A.
Very low
B.
Moderate
C.
Very high
D.
Zero
ANSWER :
C. Very high