A rectangular coil of a moving coil galvanometer contains 100 turns, each having area `15 cm^(2)`. It is suspended in the radial magnetic field 0.03 T. The twist constant of suspension fibre is `15xx10^(-10)` N-m/degree. Calculate the sensitivity of the moving coil galvanometer.

Explanation

Given, `n=100` turns
Area `=15cm^(2)=15xx10^(-4)m`
`B=0.03 T`
`c=15xx10^(-10)Nm//"degree" `
Now, Current sensitivity of M.C.G.
`S_(i)=(nBA)/(c )`
`S_(i)=(100xx0.03xx15xx10^(-4))/(15xx10^(-10))`
`S_(i)=3xx10^(6)"div"//A.`