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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
A metal sheet is placed in front of a strong magnetic pole. A force is needed to ______________ .
(a) hold the sheet there if the metal is magnetic
(b) hold the sheet there if the metal is nonmagnetic
(c) move the sheet away from the pole with uniform velocity if the metal is magnetic
(d) move the sheet away from the pole with uniform velocity if the metal is nonmagnetic.
Neglect any effect of paramagnetism, diamagnetism and gravity.
Why and where are eddy currents are undesirable? How are they minimized?
How is Eddy current produced? How do they flow in a conductor?
The plane in which eddy currents are produced in a conductor is inclined to the plane of the magnetic field at an angle equal to ______.
Identify the wrong statement.
What are eddy currents?
Two simple pendula of length L and 4L are pulled aside to the right and are at rest so that they make an angle 30° with the vertical. They are then released simultaneously at time t = 0. The time after which they will be in phase is ______.
