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JEE Main

IMPORTANT

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The angular frequency of alternating current in a L-C-R circuit is $100 rad s^{- 1}$ . The components connected are shown in the figure. Find the value of inductance of the coil and capacity of condenser.

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Important Questions on Electromagnetic Induction and Alternating Currents

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 16 - Electromagnetic Induction and Alternating Currents>JEE Main - 25 Feb 2021 Shift 1>Q 46

A coil of inductance

2 H

having negligible resistance is connected to a source of supply whose voltage is given by

V = 3 t

volt. (where

t

is in second). If the voltage is applied when

t = 0

, then the energy stored in the coil after

4 s

J

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 16 - Electromagnetic Induction and Alternating Currents>JEE Main - 26 Feb 2021 Shift 1>Q 50

In a series LCR resonant circuit, the quality factor is measured as

100

. If the inductance is increased by two fold and resistance is decreased by two fold, then the quality factor after this change will be _______

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 16 - Electromagnetic Induction and Alternating Currents>JEE Main - 26 Feb 2021 Shift 2>Q 51

Find the peak current and resonant frequency of the following circuit (as shown in figure).

Question Image

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 16 - Electromagnetic Induction and Alternating Currents>JEE Main - 26 Feb 2021 Shift 2>Q 52

An aeroplane, with its wings spread

10 m,

is flying at a speed of

180 km h^{- 1}

in a horizontal direction. The total intensity of earth's field at that part is

2.5 \times 10^{- 4} Wb m^{- 2}

and the angle of dip is

60 ° .

The EMF induced between the tips of the plane wings will be

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 16 - Electromagnetic Induction and Alternating Currents>JEE Main - 2 September 2020 Shift 2>Q 54

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

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 16 - Electromagnetic Induction and Alternating Currents>JEE Main - 3 September 2020 Shift 1>Q 55

750 Hz, 20 V (rms)

source is connected to a resistance of

100 Ω,

an inductance of

0.1803 H

and a capacitance of

10 μ F

all in series. The time in which the resistance (heat capacity

2 J / ° C

) will get heated by

10 ° C .

(assume no loss of heat to the surroundings) is close to :

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 16 - Electromagnetic Induction and Alternating Currents>JEE Main - 3 September 2020 Shift 2>Q 56

A uniform magnetic field B exists in a direction perpendicular to the plane of a square loop made of a metal wire. The wire has a diameter of

4 mm

and a total length of

30 cm .

The magnetic field changes with time at a steady rate

\frac{dB}{dt} = 0.032 T s^{- 1} .

The induced current in the loop is close to (Resistivity of the metal wire is

1.23 \times 10^{- 8} Ω m

)

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 16 - Electromagnetic Induction and Alternating Currents>JEE Main - 4 September 2020 Shift 1>Q 57

A small bar magnet is moved through a coil at constant speed from one end to the other. Which of the following series of observations will be seen on the galvanometer $G$ attached across the coil?

Question Image

Three positions shown describe: (a) the magnet's entry (b) magnet is completely inside and (c) magnet's exit.

The angular frequency of alternating current in a L-C-R circuit is 100 rad s-1. The components connected are shown in the figure. Find the value of inductance of the coil and capacity of condenser.

Important Questions on Electromagnetic Induction and Alternating Currents

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The angular frequency of alternating current in a L-C-R circuit is $100 rad s^{- 1}$ . The components connected are shown in the figure. Find the value of inductance of the coil and capacity of condenser.