The magnetic field of the solenoid is 18.84mT, the number of turns per unit length is 500 turns per metre. Calculate the current if the core is air.

The magnetic field of the solenoid is 18.84mT, the number of turns per

1.	The magnetic field of the solenoid is 18.84mT, the number of turns per unit length is 500 turns per metre. Calculate the current if the core is air.
A.	300A
B.	30A
C.	3A
D.	300mA
Answer» C. 3A