A solenoid has 50 turns and radius 2 cm, diameter of wire is `2x 10^(-4)` m, current through it when it is joined with battery of 10V is ... Resistivity of material.2*10^-6 Ωm.

Answer

B

Explanation

1.14
I = `(V)/(R)`
`therefore I = (VA)/(rho l)`
`therefore I =(V xx pi r^(2))/(rho xx 2 pi RN) " " [ because A = pi r^(2)] `
`therefore I = (10 xx (10^(-4) )^(2))/(4.4 xx 10^(-8) xx 2 xx 2 xx 10^(-2) xx 50) = (1)/(0.88)`
`therefore I = 1.136 `A
`therefore I = 1.14 A `