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

Earn 100

The soft-iron is a suitable material for making an electromagnet. This is because soft-iron has

54.36% studentsanswered this correctly

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 - 25 June 2022 Shift 1>Q 132

A long straight wire with a circular cross-section having radius

R

, is carrying a steady current

I

. The current

I

is uniformly distributed across this cross-section. Then the variation of magnetic field due to current

I

with distance

r (r < R)

from its centre will be

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Magnetic Effects of Current and Magnetism>JEE Main - 25 June 2022 Shift 1>Q 133

A teacher in his physics laboratory allotted an experiment to determine the resistance

(G)

a galvanometer. Students took the observations for

\frac{1}{3}

deflection in the galvanometer. Which of the below is true for measuring value of

G

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Magnetic Effects of Current and Magnetism>JEE Main - 25 June 2022 Shift 2>Q 134

Given below are two statements :

Statement - I : Susceptibilities of paramagnetic and ferromagnetic substances increase with decrease in temperature.

Statement - II : Diamagnetism is a result of orbital motions of electrons developing magnetic moments opposite to the applied magnetic field.

Choose the correct 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 June 2022 Shift 2>Q 135

n

represents the actual number of deflections in a converted galvanometer of resistance

G

and shunt resistance

S

. Then the total current

I

when its figure of merit is

K

will be

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Magnetic Effects of Current and Magnetism>JEE Main - 26 June 2022 Shift 2>Q 136

A bar magnet having a magnetic moment of

2.0 \times 10^{5} J T^{- 1}

, is placed along the direction of uniform magnetic field of magnitude

B = 14 \times 10^{- 5} T

. The work done in rotating the magnet slowly through

60 °

from the direction of field is

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Magnetic Effects of Current and Magnetism>JEE Main - 26 June 2022 Shift 2>Q 137

Two

10 cm

long, straight wires, each carrying a current of

5 A

are kept parallel to each other. If each wire experienced a force of

10^{- 5} N

, then separation between the wires is _____

cm .

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Magnetic Effects of Current and Magnetism>JEE Main - 26 June 2022 Shift 1>Q 138

A proton and an alpha particle of the same velocity enter in a uniform magnetic field which is acting perpendicular to their direction of motion. The ratio of the radii of the circular paths described by the alpha particle and proton is

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 15 - Magnetic Effects of Current and Magnetism>JEE Main - 27 June 2022 Shift 1>Q 139

72 Ω

galvanometer is shunted by a resistance of

8 Ω

. The percentage of the total current which passes through the galvanometer is

The soft-iron is a suitable material for making an electromagnet. This is because soft-iron has

Important Questions on Magnetic Effects of Current and Magnetism

Learn and Prepare for any exam you want !