Advertisements
Advertisements
Question
In a transformer, the number of turns in the primary and the secondary are 410 and 1230 respectively. If the current in primary is 6A, then that in the secondary coil is
Options
2 A
18 A
12 A
1 A
Advertisements
Solution
2 A
APPEARS IN
RELATED QUESTIONS
Derive an expression for e.m.f. and current in terms of turns ratio
State two ways through which the strength of an electromagnet can be increased.
What is a transformer? On what principle does it work?
Can a transformer be used with direct current source? Give reason.
(i) Draw a clear labelled diagram of an electric bell.
(ii) Explain in brief, its working.
(iii) What material is used for the core of an electric bell? State the reason.
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 ______.
Draw the effective equivalent circuit of the circuit shown in figure, at very high frequencies and find the effective impedance.

A transformer consisting of 300 turns in the primary and 150 turns in the secondary gives output power of 2.2 kW. If the current in the secondary coil is 10 A, then the input voltage and current in the primary coil are ______.
Mention two main sources of power loss in real transformers.
