Question

Deflection produced in a galvanometer when a unit current flows through it is known as _________ .

a) voltage sensitivity.

b) current sensitivity​

Answer 1

$\huge\pink{Voltage \: sensitivity}$

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Answer 2

Answer:

The correct answer to the given question is an option (b): current sensitivity.

Explanation:

• The device which measures small currents by observing the deflection of moving coils is called a galvanometer.
• It is an Electro-mechanical device.
• It follows the principle of electromagnetic induction, where the magnetic field experiences a force when a current-carrying conductor is placed near it.
• The deflection that takes place in the coil of the galvanometer for a particular unit of the flow of current through it, is called current sensitivity.
• Current sensitivity is expressed by,

                                 $current sensitivity =\frac{NBA}{k}$

where,

N = no. of turns of a coil

B = magnetic field

A = area of cross-section of coils

k = restoring torque

Therefore, The deflection provided by the galvanometer for the flow of current through it is called current sensitivity.