A closely wound flat circular coil of 25 turns of wire has diameter of 10 cm and carries a current of 4 ampere. Determine the flux density at the center of a coil
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Number of turns in the coil, 
Diameter of coil, 
∴ Radius, 
Current 
Hence, flux density of the coil at the center is given by
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