Shown in the figure is a circular loop of radius r and resistance R. A variable magnetic field of induction 
is established inside the coil. If the key 
is closed at 
, the electrical power developed is equal to
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
The induced emf 
∴ The electrical power developed in the resistor just at the instant of closing the key
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