The picture above shows an LRC circuit driven by a sinusoidal voltage source wit

Question

The picture above shows an LRC circuit driven by a sinusoidal voltage source with frequency f. The voltage and current are Eand I, respectively, and the resonant frequency is fR. Choose TRUE or FALSE for each statement.

a)TrueFalse If f=f_R, then P=E_rms*I_rms.
b)TrueFalse For any f, I_rms=E_rms/Z.
c)TrueFalse If f>f_R, then E leads I.
d)TrueFalse If f=f_R, then E lags I by exactly 90 degrees.
e)TrueFalse If f=f_R, then E and I are in phase.
f)TrueFalse If f=f_R, then E leads I by exactly 90 degrees.
g)TrueFalse For fixed E, I is largest when f=f_R.

Explanation / Answer

a)True

b)True

c)True

d)False

e)True

f)False

g)True

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