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प्रश्न
For what purpose are the transformers used?
उत्तर
Alternating e.m.f. amplitudes can be adjusted with the use of transformers.
संबंधित प्रश्न
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.
The input and output voltage of a transformer are 220 V and 44 V respectively. Find: the turns ratio.
Describe briefly and two energy losses, giving the reasons for their occurrence in actual transformers ?
Draw a labeled diagram of a full wave rectifier circuit. State its working principle. Show the input-output waveforms ?
A transformer is used to step up an alternating emf of 200V to 440V. If the primary coil has 1000 turns, calculate the number of turns in the secondary coil.
What is a transformer? On what principle does it work?
Give the advantage of AC in long distance power transmission with an illustration.
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?
