What is the function of a transformer in an a.c. circuit? How do … - Vidyadip

Question

What is the function of a transformer in an a.c. circuit? How do the input and output powers in a transformer compare?

✓

Answer

A transformer is a device by which the amplitude of an alternating e.m.f. can be increased or decreased.
For an ideal transformer, when there is no loss of energy, the output power is equal to input power i.e.,
Power in secondary coil = power in primary coil
$E_SL_S = E_PL_S$

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 "[3 Mark Question Answer]" from Electro-Magnetism→Electro-Magnetism — all question types→Physics STD 10 question papers→ICSE Board STD 10 question papers→ICSE Board question paper generator→

Similar questions

State the snell’s laws of refraction of light.

Derive a relation between the $S.I.$ and $C.G.S$. unit of force.

Explain why potential difference is always less than the e.m.f. of a cell?

Name the type of energy possessed by a
(i) stretched catapult (ii) hot iron
(iii) wound up clock

A sound made on the surface of a lake takes $3 \ s$ to reach a boatman. How much time will it take to reach a diver inside the water at the same depth?
Velocity of sound in air $= 330 ms^−1$
Velocity of sound in water $= 1450 ms^−1$

Explain, why water is considered as best liquid for quenching thirst?

What is meant by earthing of an electrical appliance? Why is it essential?

State the factors on which the angle of deviation depends.

State three ways to minimize the global warming.

An electric bulb is rated '100 W, 250 V'. How much current will the bulb draw if connected to a 250 V supply ?