The current in a solenoid is 30A, the number of turns per unit length is 500 turns per metre. Calculate the magnetic field if the core is air.

The current in a solenoid is 30A, the number of turns per unit length

1.	The current in a solenoid is 30A, the number of turns per unit length is 500 turns per metre. Calculate the magnetic field if the core is air.
A.	18.84T
B.	18.84mT
C.	1.84T
D.	1.84mT
Answer» C. 1.84T