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

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IMPORTANT

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The carrier frequency generated by a tank circuit containing $1 nF$ capacitor and $10 μH$ inductor is

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Important Questions on Alternating Current

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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

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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

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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

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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

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IMPORTANT

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

The unit of

\sqrt{LC}

is :

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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

),

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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

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IMPORTANT

Achieve CUET (UG) Physics Practice Book>Chapter 7 - Alternating Current>Exercise>Q 70

The ratio of secondary to the primary turns in a transformer is

3 : 2

. If the power output be

P

, then the input power neglecting all losses must be equal to