## Question

The instantaneous current in a circuit is given by I = 2cos (u4t + Ï•) ampere. The r.m.s value of the current is

### Solution

.

#### SIMILAR QUESTIONS

A (100w, 200v) bulb is connected to a 160v supply. The power consumption would be

The induced emf in armature will be zero, when armature is rotated at an angle

An a.c. source is of 120 volt , 60Hz the value of the voltage after 1/360 sec from the start will be

Resonance frequency of a circuit is f if the capacitance is made 4 times the initial value , then the resonance frequency will become

In and A.C. circuit , minimum voltage of 423 Volt. Its effective voltage is

The average power dissipation in a pure capacitor in A.C. circuit is

A 100-turn rectangular coil of size 0.20 m × 0.10 m rotates in a magnetic field of 0.003 Wb m^{–2} with a frequency of 1200 rpm about an axis normal to the field. Find the maximum value of the induced emf.

An a.c. generator consisting of a coil of 100 turns and cross-sectional area of 3 m^{2} is rotating at a constant angular speed of 60 rad s^{–1} in a uniform magnetic field of 0.04 T. The resistance of the coil is 500 . Calculate maximum current drawn from the generator, and power dissipation in the coil. From where does the power come?

An a.c. generator consists of a coil of 50 turns and area 2.5 m^{2} rotating at an angular speed of 60 rad s^{–1} in a uniform magnetic field of 0.30 T. The resistance of the circuit including that of the coil is 500 . Find the maximum current drawn from the generator.