MCQ
A transformer is based on the principle of
  • Mutual inductance
  • B
    Self inductance
  • C
    Ampere's law
  • D
    Lenz's law

Answer

Correct option: A.
Mutual inductance

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

Similar questions

In the circuit shown in figure neglecting source resistance the voltmeter and ammeter reading will respectively, will be
Image
A man can see the objects upto a distance of one metre from his eyes. For correcting his eye sight so that he can see an object at infinity, he requires a lens whose power is or A man can see upto $100 \mathrm{~cm}$ of the distant object. The power of the lens required to see far objects will be
A Carnot's engine is made to work between $200^{\circ} \mathrm{C}$ and $0^{\circ} \mathrm{C}$ first and then between $0^{\circ} \mathrm{C}$ and $-200^{\circ} \mathrm{C}$. The ratio of efficiencies of the engine in the two cases is
Emission spectrum of $\mathrm{CO}_2$ gas
A square metallic wire loop of side $0.1 \mathrm{~m}$ and resistance of $1\  \Omega$ is moved with a constant velocity in a magnetic field of $2\  \mathrm{wb} / \mathrm{m}$ as shown in figure. The magnetic field is perpendicular to the plane of the loop, loop is connected to a network of resistances. What should be the velocity of loop so as to have a steady current of $1 \mathrm{~mA}$ in loop
Image
The current through an ideal $P N$-junction shown in the following circuit diagram will be
Out of the following which quantity does not depend on path
In case of a semiconductor, which of the following statement is wrong
Four wires of identical length, diameters and of the same material are stretched on a sonometre wire. If the ratio of their tensions is 1 : $4: 9: 16$ then the ratio of their fundamental frequencies are
In our solar system, there is one sun and