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प्रश्न
State the factors on which the frequency of the alternating e.m.f. depends.
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उत्तर
The frequency of the alternating e.m.f. depends on the frequency of rotation of the coil.
संबंधित प्रश्न
Name two factors on which the magnitude of an induced e.m.f. in the secondary coil depends.
How are the e.m.f in the primary and secondary coils of a transformer related with the number of turns in these coils?
The input and output voltage of a transformer are 220 V and 44 V respectively. Find: the turns ratio.
Name three losses of energy in a transformer. How are they minimized?
State whether true or false. If false, correct the statement.
A transformer can step up direct current.
Assertion: A transfonner cannot work on D.C. supply.
Reason: D.C. changes neither in magnitude nor in direction.
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.
An ideal transformer converts 220 V a.c. to 3.3 kV a.c. to transmit a power of 4.4 kW. If primary coil has 600 turns, then alternating current in secondary coil is ______.
Mention two main sources of power loss in real transformers.
The primary coil of a transformer has 60 turns whereas its secondary coil has 3000 turns.
If a 220 V ac voltage is applied to the primary coil, how much emf is induced in the secondary coil?
