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प्रश्न
Why is the iron core of a transformer made laminated (thin sheets) instead of being in one solid piece?
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उत्तर
Laminated thin sheets assist limit energy loss by producing strong field lines and eddy currents in the core. It lessens core hysteresis loss as well.
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संबंधित प्रश्न
State the principle of transformer working with the help of a diagram
Which coil of a step up transformer is made thicker and why?
Name two factors on which the magnitude of an induced e.m.f. in the secondary coil depends.
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.
Name the phenomenon ?
Explain the significance of Lenz’s law to show the conservation of energy in electromagnetic induction.
A transformer lowers e.m.f. 220 V to 12 volts. If the number of turns in primary are 8800, how many turns are in secondary coil?
Explain the working of the transformer.
Assertion: A transfonner cannot work on D.C. supply.
Reason: D.C. changes neither in magnitude nor in direction.
