A direct voltage of 200 V is suddenly applied to a series RL circuit having R=20Ω and L=0.2H. The rate of change of current at t=0.02sec is______ A/sec.
A
112.67
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B
154.65
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C
135.33
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D
56.9
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Solution
The correct option is C 135.33 As the voltage is applied suddenly
The current in the circuit i(t)=I∞−(I∞−I0)e−t/τ