In a laboratory experiment a student connects a resistor R=50Ω, an inductor L=0.20H and a capacitor C=80μF in series to an a.c. source having a peak emf of 100V.
a. (i) Calculate the resonant frequency of the circuit.
b. (ii) Find the peak value of current at resonance.
c. (iii) Determine the peak current when the supply frequency is 1.5 times the resonant frequency.
d. (iv) Compare the results of parts (ii) and (iii) and state which current is larger, giving a brief reason based on circuit parameters.