Alternating Current Basics: JEE Questions & Solutions

The electric current in the circuit is given as i=i0 ( tT). The r.m.s. current for the period t=0 to t=T is:

An inductor stores 16 J of magnetic field energy and dissipates 32 W of thermal energy due to its resistance when an alternating current of…

An alternating current is given by I = IA t + IB t. The r.m.s. current will be:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Choke coil is…

An electric bulb rated as 100 W-220 V is connected to an ac source of rms voltage 220 V. The peak value of current through the bulb is:

An alternating current is represented by the equation, i=100 2 (100 t) ampere. The RMS value of current and the frequency of the given…

An AC current is represented as: i = 5 2 + 10 (650 t + 6) Amp The RMS value of the current is:

In an a.c. circuit, voltage and current are given by V = 100 (100t) V and I = 100 (100t + 3) mA, respectively. The average power dissipated…

An alternating voltage V(t) = 220 100t volt is applied to a purely resistive load of 50. The time taken for the current to rise from half…

Three identical resistors with resistance R = 12 and two identical inductors with self inductance L = 5 mH are connected to an ideal…

An alternating voltage source V = 260 (628t) is connected across a pure inductor of 5 mH. The inductive reactance in the circuit is:

A capacitor of capacitance 150.0 F is connected to an alternating source of emf given by E = 36 (120 t) V. The maximum value of current in…

As per the given graph, choose the correct representation for curve A and curve B. (Where XL = reactance of pure inductive circuit…