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प्रश्न
State any two causes of energy loss in actual transformers.
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उत्तर
Following are the two cause of energy loss:
- Iron loss: Loss in the bulk of iron core due to the induced eddy currents. It is minimised by using thin laminated core.
- Current flowing through the primary and secondary coils will generate heat. Low resistance copper wires is used to reduce this effect.
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संबंधित प्रश्न
Give one example of use of eddy currents.
Describe briefly three main useful application of eddy currents ?
Write two examples of their useful applications .
Which of the following does not use the application of eddy current?
Which of the following is not the application of eddy currents?
What are eddy currents?
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Eddy currents are also known as ______
A metal plate is getting heated. It can be because ______.
- a direct current is passing through the plate.
- it is placed in a time varying magnetic field.
- it is placed in a space varying magnetic field, but does not vary with time.
- a current (either direct or alternating) is passing through the plate.
Consider a metallic pipe with an inner radius of 1 cm. If a cylindrical bar magnet of radius 0.8 cm is dropped through the pipe, it takes more time to come down than it takes for a similar unmagnetised cylindrical iron bar dropped through the metallic pipe. Explain.
