Download App

Electromagnetic Induction — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsElectromagnetic Induction1 Mark
MCQ
The mutual inductance between two coils is $1.25$ henry. If the current in the primary changes at the rate of $80$ ampere/second, then the induced e.m.f. in the secondary is
  • A
    $12.5 \mathrm{~V}$
  • B
    $64.0 \mathrm{~V}$
  • C
    $0.016 \mathrm{~V}$
  • ✓
    $100.0 \mathrm{~V}$
✓

Answer

Correct option: D.
$100.0 \mathrm{~V}$
(d) $e=M \frac{d i}{d t}=1.25 \times 80=100 \mathrm{~V}$

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

More "MCQ" from Electromagnetic Induction→Electromagnetic Induction — all question types→JEE physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

A biconvex lens forms a real image of an object placed perpendicular to its principal axis. Suppose the radii of curvature of the lens tend to infinity. Then the image would
→
When an unpolarized light of intensity $I_0$ is incident on a polarizing sheet, the intensity of the light which does not get transmitted is
→
Battery shown in figure has e.m.f. $E$ and internal resistance $r$. Current in the circuit can be varied by sliding the contact $J$. If at any instant current flowing through the circuit is $l$, potential difference between terminals of the cell is $V$, thermal power generated in the cell is equal to $\eta$ fraction of total electrical power generated in it.; then which of the following graph is correct
Image
→
A geostationary satellite
→
The first operation involved in a Carnot cycle is
→
An ideal gas has volume $V_0$ at $27^{\circ} \mathrm{C}$. It is heated at constant pressure so that its volume becomes $2 V_0$. The final temperature is
→
When a uniform wire of radius $r$ is stretched by a $2 kg$ weight, the increase in its length is $2.00 mm$. If the radius of the wire is $r / 2$ and other conditions remain the same, the increase in its length is
→
The average dipole moment of $Fe$ atoms is $1.8 × 10^{-23}\ A-m^2$ . The magnetic moment of an iron rod of length $10\ cm$ and diameter $1\,cm$ is........$A-m^2$ : (density and at. wt. of $Fe$ are $7.87\ g/cm^3$ and   $55.87$ )
→
If a convex lens of focal length $80 \mathrm{~cm}$ and a concave lens of focal length $50 \mathrm{~cm}$ are combined together, what will be their resulting power
→
The period of oscillation of a magnet in vibration magnetometer is $2$ sec. The period of oscillation of a magnet whose magnetic moment is four times that of the first magnet is
→