Determine the value of magnetic field (in mT) at the centre of a 20 cm long solenoid, if the solenoid has 200 turns and carrying a current of 4 A.

Determine the value of magnetic field (in mT) at the centre of a 20 cm

1.	Determine the value of magnetic field (in mT) at the centre of a 20 cm long solenoid, if the solenoid has 200 turns and carrying a current of 4 A.
A.	5
B.	8
C.	9
D.	11
Answer» B. 8

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Determine the value of magnetic field (in mT) at the centre of a 20 cm long solenoid, if the solenoid has 200 turns and carrying a current of 4 A.

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