Download App

Electromagnetic Induction — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsElectromagnetic Induction1 Mark
MCQ
A step$-$down transformer is connected to main supply $200 \mathrm{~V}$ to operate a $6 \mathrm{~V}, 30 \mathrm{~W}$ bulb. The current in primary is
  • A
    $3 A$
  • B
    $1.5 \mathrm{~A}$
  • C
    $0.3 \mathrm{~A}$
  • ✓
    $0.15 \mathrm{~A}$
✓

Answer

Correct option: D.
$0.15 \mathrm{~A}$
$0.15 \mathrm{~A}$

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

Which of the following system of units is not based on units of mass, length and time alone
→
An e.m.f. of $12$ volt is produced in a coil when the current in it changes at the rate of $45\  \mathrm{amp} / \mathrm{minute}.$ The inductance of the coil is
→
Two identical metal balls at temperature $200^{\circ} \mathrm{C}$ and $400^{\circ} \mathrm{C}$ kept in air at $27^{\circ} \mathrm{C}$. The ratio of net heat loss by these bodies is
→
The unit of percentage error is
→
If a spring extends by $x$ on loading, then energy stored by the spring is (if $T$ is the tension in the spring and $K$ is the spring constant)
→
An electron is moving in electric field and magnetic field it will gain energy from
→
Which of the accompanying $P V$, diagrams best represents an isothermal process
→
Sodium and copper have work functions $2.3 \mathrm{eV}$ and $4.5 \mathrm{eV}$ respectively. Then the ratio of their threshold wavelengths is nearest to
→
The units of modulus of rigidity are
→
A ball is released from certain height. It loses $50 \%$ of its kinetic energy on striking the ground. It will attain a height again equal to
→