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प्रश्न
Explain the significance of Lenz’s law to show the conservation of energy in electromagnetic induction.
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उत्तर
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.
संबंधित प्रश्न
Draw a labeled diagram of a step-down transformer.
Name two factors on which the magnitude of an induced e.m.f. in the secondary coil depends.
State two factors on which the magnitude of induced e.m.f. depend.
Why is the iron core of a transformer made laminated (thin sheets) instead of being in one solid piece?
State the underlying principle of a transformer. How is the large scale transmission of electric energy over long distances done with the use of transformers?
Give the advantage of AC in long distance power transmission with an illustration.
A 60 W load is connected to the secondary of a transformer whose primary draws line voltage. If a current of 0.54 A flows in the load, what is the current in the primary coil? Comment on the type of transformer being used.
A 12 V, 60 W lamp is connected to a 220 V AC supply using an ideal transformer. Find the primary current.
