Is the RLC Circuit in Resonance?

Loke
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-Is the RCL circuit in resonant? Explain
-Given that C is equal to 2X10-3F, find inductance, L.

problems:
-Is fo equal to 1...because the maximum value in the graph at t=1?
-from the graph,how to know that the graph is resonant or not?...can i say that because the current and the voltage reaches it peaks at the same instant ...that's y they are in phase = resonant ?

please advice.
 

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--- f0 is not equal to 1. It is the reciprocal of time at which the sine waveform repeats itself. From graph you can see the time period is 4 ms.

--- your way of thinking is correct about a resonant circuit.
 
you meant the resonance frequency,fo = 1/T = 1/(4x10^-3) =250s^-1 ?
 
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