MODEL QUESTIONS

Author:Odisha Board

Odisha Board Physics Solutions for Exercise - MODEL QUESTIONS

Simple step-by-step solutions to MODEL QUESTIONS questions of Alternating Currents from Bureau's Higher Secondary Physics Class 12. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.

Questions from MODEL QUESTIONS with Hints & Solutions

EASY
12th Odisha Board
IMPORTANT

The emf of an AC circuit is given by e=60 sin53.141t and the current by i=6010.628 sin 53.141t-π2. Then the power consumed by the circuit is  _____.

EASY
12th Odisha Board
IMPORTANT

The instantaneous emf of an AC circuit is given by ε=4 sin100t+ϕ V. If the circuit contains an inductance of 2 H, the peak current in the circuit is ______.

EASY
12th Odisha Board
IMPORTANT

An alternating current in a circuit is given by i=i1sinωt+i2cosωt. The RMS current in the circuit is given by _____.

EASY
12th Odisha Board
IMPORTANT

An inductive coil joined to a 6 V battery draws a steady current of  6 A. The coil is joined to a capacitor and an AC source of RMS voltage of 6 V in series. If the current in the circuit is in phase with the emf, the RMS current in the circuit is _____.

EASY
12th Odisha Board
IMPORTANT

Show that the average value of AC over a cycle is zero.

EASY
12th Odisha Board
IMPORTANT

An AC circuit contains a variable capacitor in series with a fixed resistor. Plot any curve as capacitance is varied from zero to a very large value.

MEDIUM
12th Odisha Board
IMPORTANT

Find an expression for the average power expended in a resistor in a quarter cycle of AC.

EASY
12th Odisha Board
IMPORTANT

Write the expression for the impedance of an LCR circuit and hence show the condition under which its impedance equals its resistance.