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प्रश्न
Transformer works on ______.
विकल्प
AC only
DC only
Both AC and DC
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उत्तर
Transformer works on AC only
APPEARS IN
संबंधित प्रश्न
Express the turn ratio in terms of voltages.
Name two factors on which the magnitude of an induced e.m.f. in the secondary coil depends.
What is the function of a transformer in an a.c. circuit? How do the input and output powers in a transformer compare?
Copy the given diagram of a transformer and complete it. Name the parts A and B. Name the part you have drawn to complete the diagram. What is the material of this part? Is this transformer a step-up or step-down? Give reason.
What is Transformer?
The primary of a transformer has 40 turns and works on 100 V and 100 W. Find a number of turns in the secondary to step up the voltage to 400 V. Also calculate the current in the secondary and primary.
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.
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 ______.
Explain why core of a transformer is always laminated.
