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प्रश्न
Write the function of a transformer.
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उत्तर
A transformer is a device that changes or transforms a low alternating voltage into a high alternating voltage or vice versa.
संबंधित प्रश्न
What type of current is transmitted from the power station?
In a transformer, the frequency of A.C. voltage ______.
Describe, with the help of a suitable diagram, the working principle of a step-up transformer. Obtain the relation between input and output voltages in terms of the number of turns of primary and secondary windings and the currents in the input and output circuits.
Describe briefly, with the help of labelled diagram, working of a step-up transformer.
A step-up transformer converts a low voltage into high voltage. Does it not violate the principle of conservation of energy? Explain.
State the mathematical relation between a number of turns in the primary coil to a secondary coil in the step-up transformer.
What is Transformer?
A 200V/120V step-down transformer of 90% efficiency is connected to an induction stove of resistance 40 Ω. Find the current drawn by the primary of the transformer.
Assertion: A transfonner cannot work on D.C. supply.
Reason: D.C. changes neither in magnitude nor in direction.
Two coils P and Q are kept near each other. When no current flows through coil P and current increase in coil Q at the rate 10A/s, the emf in coil P is 15mV. When coil Q carries no current and current of 1. 8A flows through coil P, the magnetic flux linked with the coil Q is ______.
