Advertisements
Advertisements
प्रश्न
Explain why core of a transformer is always laminated.
Advertisements
उत्तर
The core of a transformer is always laminated to reduce the loss of power/energy due to eddy currents.
APPEARS IN
संबंधित प्रश्न
State the principle of transformer working with the help of a diagram
Why is the core of a transformer laminated?
You are required to make an electromagnet from a soft iron bar by using a cell, an insulated coil of copper wire and a switch. (a) Draw a circuit diagram to represent the process. (b) label the poles of the electromagnet.
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.

In a transformer, the frequency of A.C. voltage ______.
Given the input current 15 A and the input voltage of 100 V for a step-up transformer having 90% efficiency, find the output power and the voltage in the secondary if the output current is 3 A.
Explain the construction of transformer.
Assertion: A transfonner cannot work on D.C. supply.
Reason: D.C. changes neither in magnitude nor in direction.
The primary coil of a transformer has 60 turns whereas its secondary coil has 3000 turns.
If a current of 5A flows in the primary coil, how much current will flow in a load in the secondary coil? State the assumption you have made regarding the transformer, in this calculation.
What is a transformer?
