An LC circuit has L =20 mH , `C=50muF` and initial charge 10 mC the resistance being negligible. After what time interval from the moment the circuit is switched on the energy stored is (i) completely electrical i.e., stored only in the capacitor and (ii) completely magnetic ,i.e., stored only in the indicator?

An LC circuit has L =20 mH , `C=50muF` and initial charge 10 mC the re

1.	An LC circuit has L =20 mH , `C=50muF` and initial charge 10 mC the resistance being negligible. After what time interval from the moment the circuit is switched on the energy stored is (i) completely electrical i.e., stored only in the capacitor and (ii) completely magnetic ,i.e., stored only in the indicator?
Answer» `q=q_0cosomegat` (i) when t=0, `T/2,T,(3T)/2,.....` then `q=pmq_0` i.e,. The energy is completely electrical. (ii) when `t=T/4,(3T)/4,(5T)/4,.......` then q=0 i.e., the energy is purely magnetic.

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