1.
What is the value of inductance L for which the current is a maximum in a series L-C-R circuit with and ?
2.
A coil of resistance and inductance is connected to a battery of emf volt. The final current in the coil is
3.
An alternating e.m.f. is applied to purely capacitive circuit. The phase relation between e.m.f. and current flowing in the circuit is or
In a circuit containing capacitance only
4.
An ac source of variable frequency is connected to an series circuit. Which of the graphs in figure represents the variation of current in the circuit with frequency
5.
A metal rod of resistance 20 is fixed along a diameter of a conducting ring of radius 0.1 m and lies on plane. There is a magnetic field = (50 T) . The ring rotates with an angular velocity about its axis. An external resistance of 10 is connected across the centre of the ring and rim. The current through external resistance is