Why is the choke advantageous to resistors in controlling current in an a.c. circuit?

Which is the best method of reducing current in an a.c. circuit and why ?

Why do we not use resistor to control a.c.?

State the advantage of capacitor filter circuit?

Select and write the most appropriate answer. The instantaneous current in an A.C. circuit is given by I = 2 sin (omegat +theta) ampere. The r.m.s. value of the current is

What is power consumed in a purely inductive a.c. circuit ?

What is the change in the collector current in a transistor of a.c. current gain 150, for a 100 mu A change in the base current ?

Current in a circuit is wattless, if

An A.C. circuit of maximum e.m.f. 100 volt and of frequency 50 Hz contains an inductance of 0.2 mH. What is the inductive reactance of the circuit? What is the maximum current in the circuit?

A battery of emf 12 V and internal resistance 3 Omega is connected to a resistor. If the current in the circuit is 0.5 A, Calculate resistance of resistor.