A) zero
B) 240 V
C) 180 V
D) 60 V
Correct Answer: C
Solution :
Current in the circuit \[i=15mA=15\times {{10}^{-3}}A\] Resistance \[R=4000V\] Applied voltage in the circuit = 240V At any constant, the emf of the battery is equal to the sum of potential drop on the resistor and the emf developed in the induction coil. \[E=iR+L\frac{di}{dt}\] \[240=15\times {{10}^{-3}}\times 4000+L\frac{di}{dt}\] \[L\frac{di}{dt}=240-60=180\,V\]You need to login to perform this action.
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