Question:
The AC voltage across a resistance can be measured using a :
The AC voltage across a resistance can be measured using a :
Updated On: Aug 21, 2024
- potentiometer
- moving coil galvanometer
- moving magnet galvanometer
- hot wire voltmeter
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The Correct Option is D
Solution and Explanation
Moving coil and moving magnet galvanometer measures DC and hot wire voltmeter measures runs value of AC voltage
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Concepts Used:
Electrical Instruments
There are various electrical instruments used to measure current, power, voltage, etc. Some of them are briefly explained below:
Moving Coil Galvanometer
- It is an electromagnetic device which measures small values of current.
- Its working principle is that whenever a current loop is placed in a magnetic field, it experiences a certain torque. The value of that torque can be modified by modifying the current in the loop.
- For a current carrying loop having N turns, and cross sectional area A, carrying current i, whenever it is placed in and along the direction of an external magnetic field B, it experiences a torque given by:
ԏ = NiAB
