Question

A current of 3.14 A passing through wire of radius 1 cm if no. of 3 electron per unit volume is 10 ka power 24 electron find and velocity​

Answer 1

I = 3.14amp= π amp

r= 1 cm 10^-2meter

n =3/10^-24

The. use then formula

B =myu0/4π × 2i/r

for velocity force must be known