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प्रश्न
Transformer works on ______.
पर्याय
AC only
DC only
Both AC and DC
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उत्तर
Transformer works on AC only
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संबंधित प्रश्न
The input and output voltage of a transformer are 220 V and 44 V respectively. Find: the turns ratio.
State the principle of a step-up transformer. Explain, with the help of a labeled diagram, its working ?
An a.c generator generates an emf 'ε' where ε = 314 Sin (50πt) volt. Calculate the frequency of emf ε.
Distinguish between Step up and Step Down Transformer.
What is Transformer?
Describe the construction and working of a transformer with a neat labelled diagram.
The output power in step-up transformer used in practice is ______.
A 220 V input is supplied to a transformer. The output circuit draws a current of 2.0 A at 440 V. If the ratio of output to input power is 0.8, then the current drawn by primary winding is ______.
Read the following paragraph and answer the question:
Long distance power transmissions
The large-scale transmission and distribution of electrical energy over long distances is done with the use of transformers. The voltage output of the generator is stepped up. It is then transmitted over long distances to an area sub-station near the consumers. There the voltage is stepped down. It is further stepped down at distributing sub-stations and utility poles before a power supply of 240 V reaches our homes.
We need to step-up the voltage for power transmission, so that ______.
An iron rod is placed parallel to magnetic field of intensity 2000 Am-1. The magnetic flux through the rod is 6 × 10−4 Wb and its cross-sectional area is 3 cm2. The magnetic permeability of the rod in Wb A-1m-1 is ______.
