Electro Magnetic Induction And Alternating Currents Question 211

Question: In an oscillating LC circuit with L = 50 mH and C=4.0μF , the current is initially a maximum. How long will it take before the capacitor is fully discharged for the first time:

Options:

A) 7×104s

B) 14×104s

C) 28×104s

D) none of these

Show Answer

Answer:

Correct Answer: A

Solution:

  • Time period, T=2πLC=2π(50×103)×4×106

    =28×104s

    Time taken by capacitor to charge fulley, t=T4=7×104s.



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