Question

Q.13
A solenoid of length 25 cm has inner radius of 1 cm and is made up of 250 turns of copper
wire, for a current of 3 A in it. What will be the magnitude of the magnetic field inside the
solenoid?​

Answer 1

Answer:

The magnetic field inside the solenoid:

B=μ

0

in=μ

0

i(

l

N

) where i=0.30 ,l=0.25m, N=200. This yields

B=3.0×10

−4

T