Advertisements
Advertisements
Question
Explain the significance of Lenz’s law to show the conservation of energy in electromagnetic induction.
Advertisements
Solution
Lenz's law implies the law of conservation of energy. It shows that the mechanical energy spent in doing work, against the opposing force experienced by the moving magnet, is transformed into the electrical energy due to which current flows in the solenoid.
RELATED QUESTIONS
Mention various energy losses in transformer device
Name the phenomenon ?
The secondary windings of a transformer in which the voltage is stepped down are usually made of thicker wire than the primary. Explain why.
Mention the two characteristic properties of the material suitable for making core of a transformer.
Describe briefly and two energy losses, giving the reasons for their occurrence in actual transformers ?
State the factors on which the frequency of the alternating e.m.f. depends.
A 220 V input is supplied to a transformer. The output circuit draws a current of 2.0 A at 440 V. If the ratio of output to input power is 0.8, then the current drawn by primary winding is ______.
Which among the following, is not a cause for power loss in a transformer?
A step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V, 44 W lamp. Ignoring power losses in the transformer, what is the current in the primary circuit?
Efficiency of transformer is the ratio of ______.
