A long solenoid of diameter 0.1 m has 2 × 10 4 turn per meter. At the center of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to 0A from 4 A in 0.05 s. If the resistance of the coil is 10π 2 Ω Ω , the total charge flowing through the coil during this time is
Text Solution
Verified by ExpertsThe correct answer is:
C
q = 
N = Number of loops in coil
A = Area of coil
N = Number of turns per unit length of solenoid
Q = 
= 32µC
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