If a solenoid has the length of 10 cm and has 2000 turns what is the electric current required to create a magnetic field inside of a solenoid of 0.4t.

15.92 A

Explanation:

L = length of the solenoid = 10 cm = 0.10 m

N = Number of turns of the solenoid = 2000

B = magnitude of magnetic field inside the solenoid = 0.4 T

i = magnitude of electric current in the solenoid

Magnetic field inside the solenoid is given as

i = 15.92 A

i believe the answer is a