Download App

Electromagnetic Induction — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsElectromagnetic Induction1 Mark
MCQ
A varying current in a coil changes from $10 \mathrm{amp}$ to zero in $0.5 \mathrm{sec}$. If average EMF is induced in the coil is $220$ volts, the self inductance of coil is
  • A
    $5 \mathrm{H}$
  • B
    $10 \mathrm{H}$
  • ✓
    $11 \mathrm{H}$
  • D
    $12 \mathrm{H}$
✓

Answer

Correct option: C.
$11 \mathrm{H}$
(c) $|e|=L \frac{d i}{d t} \Rightarrow 220=L \times \frac{10}{0.5} \Rightarrow L=11 H$

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

When the number of turns in a coil is doubled without any change in the length of the coil, its self inductance becomes
→
If temperature of a black body increases from $7^{\circ} \mathrm{C}$ to $287^{\circ} \mathrm{C}$, then the rate of energy radiation increases by
→
The type of waves that can be propagated through solid is
→
In a step-up transformer the voltage in the primary is $220 \mathrm{~V}$ and the current is $5 A$. The secondary voltage is found to be $22000 \mathrm{~V}$. The current in the secondary (neglect losses) is
→
For a given temperature difference, which of the following pairs will generate maximum thermo e.m.f.
→
A particle travels $10 m$ in first $5 sec$ and $10 m$ in next $3 sec$. Assuming constant acceleration what is the distance travelled in next $2 sec$
→
A boy is walking away from a wall towards an observer at a speed of $1$ metre/sec and blows a whistle whose frequency is $680 \mathrm{~Hz}$. The number of beats heard by the observer per second is (Velocity of sound in air $=340$ metres $/ \mathrm{sec}$
→
A concave mirror is used to focus the image of a flower on a nearby well $120 \mathrm{~cm}$ from the flower. If a lateral magnification of $16$ is desired, the distance of the flower from the mirror should be
→
An object $1 \mathrm{~cm}$ tall is placed $4 \mathrm{~cm}$ infront of a mirror. In order to produce an upright image of $3 \mathrm{~cm}$ height one needs a
→
In order to coincide the parabolas formed by singly ionised ions in one spectrograph and doubly ionized ions in the other Thomson's mass spectrograph, the electric fields and magnetic fields are kept in the ratios $1: 2$ and $3: 2$ respectively. Then the ratio of masses of the ions is
→