Home Physics Alternating Current Mix Shown in the figure is an R-L circuit. Just …
Physics Alternating Current Mix MCQ (Single Correct)

Shown in the figure is an R-L circuit. Just after the Key (K) is closed

A
The current in the circuit is zero
B
No potential drop across the resistor
C
Potential drop across the inductor is E
D
No heat is dissipated in the circuit

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Text Solution

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The correct answer is:
CHECK THE SOLUTION.

(a, b, c, d)

The current in the circuit at the instant of closing the Key is equal to . Current at any time in transient state is given as

The voltage drop across the inductor is that oppose the applied emf E

Since the circuit current is zero, the heat loss (proportional to ) will be zero

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