Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 61

EASY

CUET (UG)

IMPORTANT

Earn 100

An inductor $L$ is allowed to discharge through a capacitor $C$ . The emf induced across the inductor, when the capacitor is fully charged, is

50% studentsanswered this correctly

Important Questions on Alternating Current

EASY

CUET (UG)

IMPORTANT

Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 62

The carrier frequency generated by a tank circuit containing

1 nF

capacitor and

10 μH

inductor is

EASY

CUET (UG)

IMPORTANT

Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 63

A charged

30 μ F

capacitor is connected to a

27 m H

inductor. The angular frequency of free oscillations of the circuit is

EASY

CUET (UG)

IMPORTANT

Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 64

In an oscillating

L C

circuit, the maximum charge on the capacitor is

Q

. The charge on the capacitor when the energy is stored equally between the electric and magnetic fields is

EASY

CUET (UG)

IMPORTANT

Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 65

\frac{20}{π^{2}} H

inductor is connected to a capacitor of capacitance

C

. The value of

C

in order to impart maximum power at

50 Hz

is

EASY

CUET (UG)

IMPORTANT

Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 66

Same current flows in two separate AC circuits. The first circuit contains inductance only, while the second contains capacitance only. If the frequency of the applied voltage increases, the current

EASY

CUET (UG)

IMPORTANT

Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 67

The unit of

\sqrt{LC}

is :

EASY

CUET (UG)

IMPORTANT

Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 68

The inductance of the oscillatory circuit of the ratio station is

10 mH

and its capacitance is

0.25 μF

. Taking the effect of resistance negligible, wavelength of the broadcasted waves will be (velocity of light

= 3.0 \times 10^{8} m s^{- 1}, π = 3.14

),

EASY

CUET (UG)

IMPORTANT

Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 69

In a transformer, the coefficient of mutual inductance between the primary and the secondary coil is

0.2 H

. When the current changes by

5 A s^{- 1}

in the primary, the induced emf in the secondary will be