A circuit connected to an ac source of emf e = e0 sin (100t) with t in seconds, gives a phase difference of 4 π between the emf e and current i. Which of the following circuits will exhibit this ?
(1) RL circuit with R = 1 kΩ and L = 10 mH
(2) RL:circuit with R = 1 kΩ and L = 1 mH
(3) RC circuit with R = 1 kΩ and C = 1μF
(4) RC circuit with R = 1 kΩ and C = 10μF
