Question

Write the relation for current sensitivity and voltage sensitivity

Answer 1

Hi Wr u from bro Telugu

Answer 2

Galvanometer

Current Sensitivity:

The deflection of a galvanometer per unit current is called current sensitivity of galvanometer.

i.e., SI=θI……(i)

In a moving coil galvanometer,

kθ=BINA

or,θI=BNAk

From equation (i) and (ii),

SI=BNAk

So, current sensitivity of a galvanometer can be increased by increasing the value of B, N and A. It can be decreased by decreasing the value of k.

Voltage Sensitivity:

The deflection of galvanometer per unit voltage is called voltage sensitivity of a galvanometer.

i.e., Sv=θV……(i)

In a moving coil galvanometer,

kθ=BINA

or,Kθ=BVRNA

or,θV=BNARk

So, voltage sensitivity of a galvanometer can be increased by increasing the value of B, N and A. It can be decreased by decreasing the value of R

Hence increasing the current sensitivity may not necessarily increase the voltage sensitivity of a galvanometer.