Advertisements
Advertisements
प्रश्न
Name two factors on which the magnitude of an induced e.m.f. in the secondary coil depends.
Advertisements
उत्तर
The magnitude of e.m.f. induced in the secondary coil depends on the following two factors:
- The ratio of the number of turns in the secondary coil to the number of turns in the primary coil (i.e., turns ratio).
- The magnitude of e.m.f applied in the primary coil.
APPEARS IN
संबंधित प्रश्न
Derive an expression for e.m.f. and current in terms of turns ratio
A power transmission line feeds input power at 2200 V to a step-down transformer with its primary windings having 300 turns. Find the number of turns in the secondary to get the power output at 220 V.
State the principle of the step-down transformer and its working.
The adjacent diagram shows a coil would around a soft iron bar XY. (a) State the polarity at the end X and Y as the switch is pressed. (b) Suggest one way increasing the strength of electromagnet so formed.

The primary coil of a transformed has 800 urns and the secondary coil has 8 turns. It is connected to a 220 V a.c. supply. What will be the output voltage?
Draw a labeled diagram of a full wave rectifier circuit. State its working principle. Show the input-output waveforms ?
Transformer works on ______.
Devices which is used to convert high alternating current to low alternating current is ______.
A transformer works on the principle of ______.
The magnetic flux through a coil perpendicular to its plane is varying according to the relation Φ = (5t3 + 4t2 + 2t - 5) Weber. If the resistant of the coil is 5 ohm, then the induced current through the coil at t = 2 sec will be ______.
