Electro Magnetic Induction And Alternating Currents Question 336

Question: The resistance in the following circuit is increased at a particular instant. At this instant the value of resistance is 10W. The current in the circuit will be now

Options:

A) i = 0.5 A

B) i > 0.5 A

C) i < 0.5 A

D) i = 0

Show Answer

Answer:

Correct Answer: B

Solution:

If resistance is constant (10W) then steady current in the circuit $ i=\frac{5}{10}=0.5,A $ . But resistance is increasing it means current through the circuit start decreasing. Hence inductance comes in picture which induces a current in the circuit in the same direction of main current. So i > 0.5 A.



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