Download App

STD 12 - 5. Magnetism and matter — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 5. Magnetism and matter4 Marks
MCQ
Relative permittivity and permeability of a material $\varepsilon_r$ and $μ_r$ respectively. Which of the following values of these quantities are allowed for a diamagnetic material?
  • A
    $\varepsilon_r = 1.5, \mu_r = 1.5$
  • B
    $\varepsilon_r = 0.5, \mu_r = 1.5$
  • ✓
    $\varepsilon_r = 1.5, \mu_r = 0.5$
  • D
    $\varepsilon_r= 0.5, \mu_r= 0.5$
✓

Answer

Correct option: C.
$\varepsilon_r = 1.5, \mu_r = 0.5$
c
For a diamagnetic material, the value of $μ_r$ is less than one. For any material, the value of $\varepsilon_r$ is always greater than $1$.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

A circular loop of flexible conducting material is kept in a magnetic field directed perpendicularly into its plane. By holding the loop at diametrically opposite points its is suddenly stretched outwards, then
→
In a Young's double slit experiment the intensity at a point where the path difference is $\frac \lambda {6}$ ($\lambda$  being the wavelength of the light used) is $I.$ If $I_0$ denotes the maximum intensity, $I_0$/$I$ is equal to
→
A nucleus $_Z{X^A}$ emits $3 \alpha$ - particles and $5 \beta$ particle. The ratio of total neutrons and protons in the final nucleus is
→
Increase in length of a wire is $1\, mm$ when suspended by a weight. If the same weight is suspended on a wire of double its length and double its radius, the increase in length will be  ........ $mm$
→
There are four forces acting at a point $P$ produced by strings as shown in figure, point $P$ is at rest. The forces $F_1$ and $F_2$ are respectively:-
→
A photoelectric material having work-function $\phi_0$ is illuminated with light of wavelength $\lambda\left(\lambda<\frac{\mathrm{hc}}{\phi_0}\right)$. The fastest photoelectron has a de Broglie wavelength $\lambda_d$. A change in wavelength of the incident light by $\Delta \lambda$ results in change $\Delta \lambda_{\mathrm{d}}$ in $\lambda_{\mathrm{d}}$. then the ratio $\Delta \lambda_{\mathrm{d}} / \Delta \lambda$ is proportional to
→
Three resistors of $4\,\Omega ,6\,\Omega $ and $12\,\Omega $ are connected in parallel and the combination is connected in series with a $1.5\, V$ battery of $1\,\Omega $ internal resistance. The rate of Joule heating in the $4\,\Omega $ resistor is ................ $W$
→
When the electrical conductivity of a semi- conductor is due to the breaking of its covalent bonds, then the semiconductor is said to be
→
If the deBroglie wavelength of an electron is equal to $10^{-3}$ times the wavelength of a photon of frequency $6\,\times 10^{14}\,Hz,$ then the speed of electron is equal to: (Speed of light $=3\times 10^8\,m/s\,;$ Planck’s constant $=6.63\times 10^{-34}\,J.s\,;$ Mass of electron $=9.1\times 10^{-31}\,kg$ )
→
A body of mass $m$ is moving in a circle of radius $r$ with a constant speed $v. $ The force on the body is $\frac{{m{v^2}}}{r}$ and is directed towards the centre. What is the work done by this force in moving the body over half the circumference of the circle
→