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Question

In the circuit shown in figure,the initial current through the inductor at $$t=0$$ is $$I_0$$.After a time $$t=\dfrac{L}{R}$$, the switch is quickly shifted to position 2.
Plot graph showing the variation of current with time.


1748186_ada447d376cf46adb277d4bc0dabe18a.png


Solution


a) Shifting the position of switch increases the resistance of the circuit. This decreases the value of time constant ,Consequently , the rate of decreases of current increases. The variation of current with time is shown in figure.
1622494_1748186_ans_fa4ee1e5dfe14b529db02fa5d7b965a6.png

Physics
NCERT
Standard XII

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