At steady state the variation of current in the circuit and the source voltage are plotted together with time, using an oscilloscope as shown 
Values of the parameters of the elements, present in the black box are
A) \[R=50\Omega \,C=200\mu F\]
B) \[R=50\,\Omega \,L=2mH\]
C) \[R=400\,\Omega ,\,C=50\mu F\]
D) \[R=50\,\Omega ,\,L=02H\]
Correct Answer: A
Solution :
\[{{\omega }_{0}}=\frac{1}{RC}=100\] Putting\[R=50\Omega \],\[C=200\mu F\] Hence, option [a] satisfies the equation.
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