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प्रश्न
For what purpose are the transformers used?
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उत्तर
Alternating e.m.f. amplitudes can be adjusted with the use of transformers.
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संबंधित प्रश्न
How much current is drawn by the primary of a transformer connected to 220 V supply when it delivers power to a 110 V − 550 W refrigerator?
Name the transformer used in the power transmitting station of a power plant.
Name two factors on which the magnitude of an induced e.m.f. in the secondary coil depends.
Why is the iron core of a transformer made laminated (thin sheets) instead of being in one solid piece?
Mention the two characteristic properties of the material suitable for making core of a transformer.
The primary coil of a transformer has 200 turns while the secondary coil has 1000 turns. What type of transformer is this? if the input voltage is 10V, what will be the output voltage?
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?
A transformer lowers e.m.f. from 220 V to 15 V. If 400 W power is given in primary, calculate (i) the current in primary coil and (ii) the current in secondary coil.
A transformer lowers e.m.f. from 220 V to 15 V. If the number of turns in primary are 3520, how many turns are in the secondary coil?
In an ideal transformer, the turns ratio is `N_p/N_s = 1/2`. The ratio Vs : Vp is equal to (the symbols carry their usual meaning):
