Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>EXERCISE 7.3>Q 17

MEDIUM

JEE Main/Advance

IMPORTANT

Earn 100

Two capacitor with initial charges $C V_{0}$ and $2 C V_{0}$ as shown in figure are connected across an inductor of inductance $L .$ Find time period of oscillation and maximum current through the circuit

Important Questions on Alternating Current

MEDIUM

JEE Main/Advance

IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>EXERCISE 7.3>Q 18

A

16 μ F

capacitor is charged to

20 V

. The battery is then disconnected and a pure

40 mH

coil is connected across the capacitor, so that LC oscillations are set up. The maximum current in the coil is

MEDIUM

JEE Main/Advance

IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>EXERCISE 7.3>Q 19

In oscillating LC circuit, the total stored energy is

U

and maximum charge upon capacitor is

Q .

When the charge upon the capacitor is

\frac{Q}{2}

, the energy stored in the inductor is

EASY

JEE Main/Advance

IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 1

The mean value of current for one complete cycle of shown current supply is

Question Image

EASY

JEE Main/Advance

IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 2

10 kJ / s

of heat is produced when a

DC

flows through a

100 Ω

resistor. Which of the following ac produces nearly same heat per sec through the same resistor?

MEDIUM

JEE Main/Advance

IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 3

If a direct current of

' a'

unit is superimposed with an alternating current

' I = b \sin ω t'

, then effective value of resulting current is

EASY

JEE Main/Advance

IMPORTANT

Gamma Question Bank for Engineering Physics>Chapter 21 - Alternating Current>Assignment Set-2>Q 4

The average value of a saw-tooth voltage

V = V_{0} (\frac{2 t}{T} - 1) .

Over 0 to

\frac{T}{2}

; (

T

-time period) is given by

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

L C R AC

circuit, the current lags the applied emf. The rate at which energy is dissipated in the resistor, can be increased by