Question
Physics Question on Magnetic Field due to a Current Element
A long solenoid of diameter 0.1 m has 2 × 104 turns per meter. At the centre 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 0 A from 4 A in 0.05 s. If the resistance of the coil is 10π2 Ω, the total charge flowing through the coil during this time is
A
32π μC
B
16 μC
C
32 μC
D
16π μC
Answer
32 μC
Explanation
Solution
The correct option is (C): 16 μC.