A metallic loop is placed in a uniform magnetic field B with the plane of the loop perpendicular to B . Under which condition (s) given an emf will be induced in the loop? "If the loop is .....

rotated about one of its diameters

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IMPORTANT

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What is the end correction (e) ? ( $l_{1} =$ length of air column at first resonance and $l_{2}$ is length of air column at second resonance in case of closed organ pipe)

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Important Questions on Electromagnetic Induction and Alternating Currents

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Physics

IMPORTANT

Physics Crash Course JEE Advanced>Chapter 16 - Electromagnetic Induction and Alternating Currents>Exercise 1>Q 30

In a

L

–

R

growth circuit, inductance and resistance used are

1 H

and

20 Ω

, respectively. If at

t = 50 ms

, current in the circuit is

3.165 A

, then applied direct current

e . m . f .

is,

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Physics

IMPORTANT

Physics Crash Course JEE Advanced>Chapter 16 - Electromagnetic Induction and Alternating Currents>Exercise 1>Q 31

An ac source of angular frequency

ω

is fed across a resistor

R

and a capacitor

C

in series. The current registered is

I

. If now, the frequency of the source is changed to

\frac{ω}{3}

(but maintaining the same voltage), the current in the circuit is found to be halved. Calculate the ratio of reactance to resistance at the original frequency

ω

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Physics Crash Course JEE Advanced>Chapter 16 - Electromagnetic Induction and Alternating Currents>Exercise 1>Q 32

An inductance coil has a reactance of

100 Ω

. When an AC signal of frequency

1000 Hz

is applied to the coil, the applied voltage leads the current by

45 °

. The self-inductance of the coil is

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Physics

IMPORTANT

Physics Crash Course JEE Advanced>Chapter 16 - Electromagnetic Induction and Alternating Currents>Exercise 1>Q 33

A sinusoidal voltage of peak value

283 V

and frequency

50 Hz

is applied to a series

L C R

circuit in which

R = 3 Ω

L = 25.48 mH,

and

C = 796 μ F

. Find the impedance of the circuit.

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Physics

IMPORTANT

Physics Crash Course JEE Advanced>Chapter 16 - Electromagnetic Induction and Alternating Currents>Exercise 1>Q 34

L C R

series circuit with a resistance of

100

Ω

is connected to an ac source of

200 V

(r.m.s.) and angular frequency

300 rad s^{- 1}

. When only the capacitor is removed, the current lags behind the voltage by

60 °

. When only the inductor is removed, the current leads the voltage by

60 °

. The average power dissipated is

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Physics Crash Course JEE Advanced>Chapter 16 - Electromagnetic Induction and Alternating Currents>Exercise 1>Q 35

A solenoid of

10 H

inductance and

2 Ω

resistance is connected to a

10 V

battery. In how much time the magnetic energy will increase to one-fourth of its maximum value?

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IMPORTANT

Physics Crash Course JEE Advanced>Chapter 16 - Electromagnetic Induction and Alternating Currents>Exercise 1>Q 36

In an

L R

circuit connected to a battery, the rate at which the energy is stored in the inductor is plotted against time, during the growth of the current in the circuit. Which of the following best represents the resulting curve?

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Physics Crash Course JEE Advanced>Chapter 16 - Electromagnetic Induction and Alternating Currents>Exercise 1>Q 37

In the circuit shown, the switch $S$ is closed at the time $t = 0$ . The charge which passes through the battery in one time constant is

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What is the end correction (e) ? (l1=length of air column at first resonance and l2 is length of air column at second resonance in case of closed organ pipe)

Important Questions on Electromagnetic Induction and Alternating Currents

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What is the end correction (e) ? ( $l_{1} =$ length of air column at first resonance and $l_{2}$ is length of air column at second resonance in case of closed organ pipe)