Question

Which expression gives the current amplitude in a series LCR circuit?

Options

• \[i_m=v_mZ\]

• \[i_m=\frac{v_m}{X_C+X_L}\]

• \[i_m=\frac{v_m}{Z}\]

• \[i_m=\frac{Z}{v_m}\]

Answer 1

Current amplitude is the voltage amplitude divided by impedance. Thus, for a given voltage amplitude, a smaller impedance produces a larger current amplitude.