In an a.c. circuit containing L only, alternating current………………….alternating voltage by a phase angle of………………..

In an a.c. circuit containing R only…………………and…………………are in ………………..phase.

Show mathematically that in an a.c. circuit only containing capacitance, the current leads e.m.f by a phase angle pi/2 .

Show mathematically that in an a.c. circuit containing only inductance, the current lags behind the e.m.f. by a phase of pi/2 . An a.c. voltage E=E_0 sin omegat is applied across an inductor L. Obtain an expression for current I.

In an LR circuit, the alternating current______the alternating emf by a certain phase angle.[Fill in the blanks]

When there is resonance in an a.c. circuit containing L,C and R, the current

In a circuit containing an inductance of zero resistance, the current leads the applied a.c. voltage by a phase angle at

In an LR circuit , the phase angle between alternating voltage and alternating current is 45^@ . The value of inductive reactance will be