EASY
JEE Main/Advance
IMPORTANT
Earn 100

The average value of a saw-tooth voltage V=V02tT-1. Over 0 to T2; (T -time period) is given by

50% studentsanswered this correctly

Important Questions on Alternating Current

MEDIUM
JEE Main/Advance
IMPORTANT
Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 6
A charged capacitor and an inductor are connected in series. At time t=0, the current is zero but the capacitor is charged. If T is the period of resulting oscillations, then the time after which current in the circuit becomes maximum, is
EASY
JEE Main/Advance
IMPORTANT
Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 7
In a series sinusoidally driven LCR AC circuit, the current lags the applied emf. The rate at which energy is dissipated in the resistor, can be increased by
EASY
JEE Main/Advance
IMPORTANT
Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 8

Two resistors are connected across an AC source of 5 V. The P.D. across 6Ω is 3 V. If resistor R  is replaced by a pure inductor of such magnitude that the value of current remains same, then the voltage across inductor is 

Question Image

EASY
JEE Main/Advance
IMPORTANT
Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 9

Refer to the series LCR AC circuit. Find the value of V3.

Question Image

MEDIUM
JEE Main/Advance
IMPORTANT
Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 10
An alternating current of 1.5mA with angular frequency 100rad s-1 flows through a 10kΩ resistor and a 00.50μF capacitor in series. The rms potential drop across the capacitor is
EASY
JEE Main/Advance
IMPORTANT
Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 11
An AC source of frequency ω when fed into a RC series circuit, current is recorded to be I. If now frequency is changed to ω4 (keeping voltage same),the current is found to 12.The ratio of reactance to resistance at original frequency ω is
EASY
JEE Main/Advance
IMPORTANT
Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 12
In a series LCR circuit, the total reactance is 4Ω and resistance is 3Ω. Its power factor is
MEDIUM
JEE Main/Advance
IMPORTANT
Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 13

The inductance of a coil in which a current 0.1 A is increasing at the rate of 0.5 A s-1 represents a power flow of 12 watt is