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Write two reasons, why a galvanometer ca...

Write two reasons, why a galvanometer cannot be used as such to measure current in a given circuit.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is the correct explanation of assertion.

C

If assertion is true but reason is false

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Galvanometer is a very sensitive device, it gives a full-scale deflection for current of the order of micro ampere. Also for measuring current the galvanometer has to be connected in series,and as it has a large resistance, this will change the value ofhte current in the circuit. To overcomes these difficulties one attaches a small resistance called shunt resistance in parallel with the galvanometer coil.
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