Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : For measuring the potential difference across a resistance of 600 Ω , the voltmeter with resistance 1000 Ω will be preferred over voltmeter with resistance 4000 Ω . Reason R : Voltmeter with higher resistance will draw smaller current than voltmeter with lower resistance. In the light of the above statements, choose the most appropriate answer from the options given below

A is not correct but R is correct

Both A and R are correct and R is the correct explanation of A

Both A and R are correct but R is not the correct explanation of A

A is correct but R is not correct

EASY

JEE Main

IMPORTANT

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The space inside a straight current carrying solenoid is filled with a magnetic material having magnetic susceptibility equal to $1.2 \times 10^{- 5}$ . What is fractional increase in the magnetic field inside solenoid with respect to air as medium inside the solenoid?

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Important Questions on Magnetic Effects of Current and Magnetism

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Magnetic Effects of Current and Magnetism>JEE Main - 28 June 2022 Shift 2>Q 146

Two parallel, long wires are kept

0.20 m

apart in vacuum, each carrying current of

x A

in the same direction. If the force of attraction per meter of each wire is

2 \times 10^{- 6} N

, then the value of

x

is approximately

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Magnetic Effects of Current and Magnetism>JEE Main - 29 June 2022 Shift 1>Q 147

A charge particle moves along circular path in a uniform magnetic field in a cyclotron. The kinetic energy of the charge particle increases to

4

times its initial value. What will be the ratio of new radius to the original radius of circular path of the charge particle?

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Magnetic Effects of Current and Magnetism>JEE Main - 29 June 2022 Shift 1>Q 148

At a certain place the angle of dip is

30 °

and the horizontal component of earth's magnetic field is

0.5 G

. The earth's total magnetic field (in

G

), at that certain place, is

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Magnetic Effects of Current and Magnetism>JEE Main - 29 June 2022 Shift 2>Q 149

Two long current carrying conductors are placed parallel to each other at a distance of

8 cm

between them. The magnitude of magnetic field produced at mid-point between the two conductors due to current flowing in them is

300 μT

. The equal current flowing in the two conductors is :

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Magnetic Effects of Current and Magnetism>JEE Main - 29 June 2022 Shift 2>Q 150

Given below are two statements :
Statement $I$ : The electric force changes the speed of the charged particle and hence changes its kinetic energy; whereas the magnetic force does not change the kinetic energy of the charged particle.
Statement $II$ : The electric force accelerates the positively charged particle perpendicular to the direction of electric field. The magnetic force accelerates the moving charged particle along the direction of magnetic field.

In the light of the above statements, choose the most appropriate answer from the options given below :

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Magnetic Effects of Current and Magnetism>JEE Main - 25 July 2022 Shift 1>Q 151

Two charged particles, having same kinetic energy, are allowed to pass through a uniform magnetic field perpendicular to the direction of motion. If the ratio of radii of their circular paths is

6 : 5

and their respective masses ratio is

9 : 4

. Then, the ratio of their charges will be

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Magnetic Effects of Current and Magnetism>JEE Main - 25 July 2022 Shift 1>Q 152

The magnetic moment of an electron

(e)

revolving in an orbit around nucleus with an orbital angular momentum is given by

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Magnetic Effects of Current and Magnetism>JEE Main - 25 July 2022 Shift 2>Q 153

The electric current in a circular coil of

2

turns produces a magnetic induction

B_{1}

at its centre. The coil is unwound and is rewound into a circular coil of

5

turns and the same current produces a magnetic induction

B_{2}

at its centre.
The ratio of

\frac{B_{2}}{B_{1}}

is:

The space inside a straight current carrying solenoid is filled with a magnetic material having magnetic susceptibility equal to 1.2×10-5. What is fractional increase in the magnetic field inside solenoid with respect to air as medium inside the solenoid?

Important Questions on Magnetic Effects of Current and Magnetism

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The space inside a straight current carrying solenoid is filled with a magnetic material having magnetic susceptibility equal to $1.2 \times 10^{- 5}$ . What is fractional increase in the magnetic field inside solenoid with respect to air as medium inside the solenoid?