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An oscillating circuit consists of a ca...

An oscillating circuit consists of a capacitor with capacitance `C`, a coil of inductance `L` with negligible resistance, and aswitch. With the switch disconnected , the capacitor was charged to a voltage `V_(m)` and then at the moment `t=0` the switch was closed . Find `:`
`(a)` the current `(I(t))` in the circuit as a function of time,
`(b)` the emf of self- inductance in the coil at the moments when the electric energy of the capacitor is equal to that of the current in the coil.

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