Advertisements
Advertisements
प्रश्न
State the factors on which the frequency of the alternating e.m.f. depends.
Advertisements
उत्तर
The frequency of the alternating e.m.f. depends on the frequency of rotation of the coil.
संबंधित प्रश्न
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 transformer is used in ______ current circuits.
Can a transformer be used with direct current source? Give reason.
Draw a labelled diagram to show the various parts of a step-up transformer and step down transformer.
A step-down transformer reduces the supply voltage from 220 V to 11 V and increase the current from 6 A to 100 A. Then its efficiency is
Find out the phase relationship between voltage and current in a pure inductive circuit.
A step-up transformer has 300 turns of primary winding and 450 turns of secondary winding. A primary is connected to 150 V and the current flowing through it is 9A. The current and voltage in the secondary are
The primary winding of a transformer has 100 turns and its secondary winding has 200 turns. The primary is connected to an a.c supply of 120 V and the current flowing in its is 10 A. The voltage and the current in the secondary are ______.
An iron rod of 0.2 cm2 cross-sectional area is subjected to a magnetising field of 1200 Am-1. If the susceptibility of iron is 599, then the magnetic flux produced is ______.
What is a transformer?
