Question
Physics Question on Alternating current
A long solenoid of radius 1 mm has 100 turns per mm. If 1 A current flows in the solenoid, the magnetic field strength at the centre of the solenoid is:
A
6.28 x 10-2 T
B
12.56 x 10-2 T
C
12.26 x 10-4 T
D
6.28 x 10-4 T
Answer
12.56 x 10-2 T
Explanation
Solution
The correct answer is (b): 12.56 x 10-2 T