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प्रश्न
Can a transformer be used with direct current source? Give reason.
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उत्तर
No, a transformer cannot be used with direct current source. The reason is that with direct current source, there will not be any change in the magnetic flux linked with the primary coil, so no e.m.f. will be induced in the secondary coil.
संबंधित प्रश्न
Write the function of a transformer.
A transformer having efficiency of 80% is working on 200 V and 6 kW power supply. If the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are ____________.
A transformer works on the principle of ______.
A transformer is used ______
Magnetic flux Φ in weber in a closed circuit of resistance 10Ω varies with time Φ (sec) as Φ = 6t2 - 5t + 1. The magnitude of induced current at t = 0.25s is ______.
The large scale transmission of electrical energy over long distances is done with the use of transformers. The voltage output of the generator is stepped-up because of ______.
What is a transformer?
Why is soft iron used in the core?
Which description of the secondary coil is correct?
Which law relates the changing flux to the EMF induced in both coils?
