Advertisements
Advertisements
प्रश्न
What is a transformer? On what principle does it work?
Advertisements
उत्तर
A transformer is device by which the amplitude of an alternating e.m.f. can be increased or decreased.
APPEARS IN
संबंधित प्रश्न
State the principle of the step-down transformer and its working.
State the principle of transformer working with the help of a diagram
The primary coil of an ideal step-up transformer has 100 turns and the transformation ratio is also 100. The input voltage and power are 220 V and 1100 W, respectively. Calculate the
(a) number of turns in secondary
(b) current in the primary
(c) a voltage across secondary
(d) current in secondary
(e) power in secondary
How are the e.m.f in the primary and secondary coils of a transformer related with the number of turns in these coils?
The secondary windings of a transformer in which the voltage is stepped down are usually made of thicker wire than the primary. Explain why.
The power supply to the primary coil of a transformer is 200 W. Find
(i) Current in primary coil if the e.m.f. supply to it is equal to 220V.
(ii) The number of turns in the primary coil is equal to 80 and that in secondary is 800. What is the transformation ratio?
(iii) Name the type of transformer.
(iv) What will be the output voltage?
(v) What is the current in the secondary coil for an ideal transformer?
(vi) What is the output power?
(vii) Is output and input power equal?
(viii) Compare the current flowing in a secondary coil and in a primary coil.
State the mathematical relation between a number of turns in the primary coil to a secondary coil in the step-up transformer.
Devices which is used to convert high alternating current to low alternating current is ______.
Give the advantage of AC in long distance power transmission with an illustration.
The primary coil of a transformer has 800 turns and the secondary coil has 8 turns. It is connected to a 220 V ac supply. What will be the output voltage?
