A solenoid with 400 turns is 10.0 cm long and has a radius of 1.0 cm. – McqOptions

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1.	A solenoid with 400 turns is 10.0 cm long and has a radius of 1.0 cm. The current in the solenoid is 5A. The magnetic field at the centre of the solenoid is:
A.	2.5 × 10-2 T
B.	2.5 × 10-3 T
C.	5.0 × 10-2 T
D.	5.0 × 10-3 T
Answer» B. 2.5 × 10-3 T

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