(D) The magnetic intensity $H$ inside the solenoid is given by $H = ni$.Given $n = 5 \, \text{turns/cm} = 500 \, \text{turns/m}$ and $i = 0.5 \, A$.So

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

(D) The magnetic intensity $H$ inside the solenoid is given by $H = ni$.Given $n = 5 \, \text{turns/cm} = 500 \, \text{turns/m}$ and $i = 0.5 \, A$.So, $H = 500 \times 0.5 = 250 \, A/m$.The intensity of magnetization $I$ is given by $I = (\mu_r - 1)H$.Given $\mu_r = 1000$, so $I = (1000 - 1) \times 250 = 999 \times 250 = 249750 \, A/m \approx 2.5 \times 10^5 \, A/m$.The magnetic moment $M$ is given by $M = I \times V$, where $V = 10^{-4} \, m^3$.$M = 2.5 \times 10^5 \times 10^{-4} = 25 \, A m^2$.

Class 12 Physics Magnetism and Matter Magnetization, Magnetic Induction Susceptibility

Difficult

An iron rod of volume $10^{-4} \, m^3$ and relative permeability $1000$ is placed inside a long solenoid wound with $5 \, \text{turns/cm}$. If a current of $0.5 \, A$ is passed through the solenoid, then the magnetic moment of the rod is .... $A m^2$.

A
$10$
B
$15$
C
$20$
D
$25$

Explore More

Browse All

Question Bank

All Subjects

Class 12 Questions

Class 12

Physics Questions

Chapter

Magnetism and Matter

Subtopic

Magnetization, Magnetic Induction Susceptibility

$A$ domain in a ferromagnetic substance is in the form of a cube of side $1 \mu m$. If it contains $8 \times 10^{10}$ atoms and each atomic dipole has a dipole moment of $9 \times 10^{-24} \ A \cdot m^{2}$,then the magnetisation of the domain is

EasyMHT CET 2020

View Solution

The $S.I.$ unit of magnetic permeability is

Easy

View Solution

The $\chi - 1/T$ graph for an alloy of paramagnetic nature is shown in the figure. The Curie constant is,then....$K$.

Medium

View Solution

The magnetic moment of a sample of $2 \text{ g}$ is $8 \times 10^{-7} \text{ Am}^2$. If its density is $4 \text{ g/cm}^3$,then the magnetization of the sample in $\text{Am}^{-1}$ is:

EasyMHT CET 2022

View Solution

$A$ magnetizing field of $100 \,A/m$ produces a magnetic flux of $2.4 \times 10^{-5} \,Wb$ in an iron bar of cross-sectional area $0.3 \,cm^2$. The magnetic permeability of the iron bar in the $SI$ unit is

MediumMHT CET 2022

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

An iron rod of volume $10^{-4} \, m^3$ and relative permeability $1000$ is placed inside a long solenoid wound with $5 \, \text{turns/cm}$. If a current of $0.5 \, A$ is passed through the solenoid, then the magnetic moment of the rod is .... $A m^2$.

Similar Questions

$A$ domain in a ferromagnetic substance is in the form of a cube of side $1 \mu m$. If it contains $8 \times 10^{10}$ atoms and each atomic dipole has a dipole moment of $9 \times 10^{-24} \ A \cdot m^{2}$,then the magnetisation of the domain is

The $S.I.$ unit of magnetic permeability is

The $\chi - 1/T$ graph for an alloy of paramagnetic nature is shown in the figure. The Curie constant is,then....$K$.

The magnetic moment of a sample of $2 \text{ g}$ is $8 \times 10^{-7} \text{ Am}^2$. If its density is $4 \text{ g/cm}^3$,then the magnetization of the sample in $\text{Am}^{-1}$ is:

$A$ magnetizing field of $100 \,A/m$ produces a magnetic flux of $2.4 \times 10^{-5} \,Wb$ in an iron bar of cross-sectional area $0.3 \,cm^2$. The magnetic permeability of the iron bar in the $SI$ unit is

Vedclass Test Series

Exam Paper Generator

Online Exam Module