For the current in LCR circuit to be maximum.

When are the voltage and current in LCR circuit in LCR- circuit in same phase?

The current in the given circuit is

How does the sign of the phase angle phi , by which the supply voltage leads the current in an LCR series circuit, change as the supply frequency is gradually increased from very low to very high values?

Derive a relation for the impedance of LCR circuit. What is the relationship between the current and e.m.f. in LCR circuit.

Write expression for current in a series LCR circuit with a.c. source?

A moving coil galvanometer of resistance 100Omega is used as an ammeter using a resistance 0.1 Omega . The maximum diflection current in the galvanometer is 100 muA . Find the minimum current in the circuit so that the ammeter shows maximum deflection

An alternating voltage of frequency f is applied across LCR circuit. Let f_r be the resonance frequency for the circuit. Will the current in the circuit lag, lead or remain in phase with the applied voltage when f>f_r ? Explain your answer in each case.