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प्रश्न
What do you understand by the terms 'direct current' and 'alternating current'?
उत्तर
If current flows in one direction only, it is called direct current, e.g., current generated by battery.
If current reverses its direction after fixed intervals of time, it is called alternating current, e.g., current supplied at homes.
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संबंधित प्रश्न
What is the difference between alternating current and direct current?
What type of current is given by (i) a dry cell, and (ii) a power House generator?
What normally drivers the alternators in a Thermal Power Station? What fuels can be used to heat eater in the boiler?
Explain ‘Electric generator’ with the help of the following points:
- Diagram of an AC Generator with labelling
- Principle of an electric generator
- The function of slip rings
- Any two uses of a generator.
State an important advantage of using alternating current (a.c.) over direct current (d.c.).
Alternating current : oscillatory :: Direct current : _______
Match the columns.
| Column A | Column B |
| 1) Direct current | a) Oscillatory |
| 2) Alternating current | b) Non oscillatory |
The domestic electricity in India is an ac with a frequency ______ of Hz.
The frequency of electricity produced by DC generator is equal to ____________.
The device used to convert AC to DC is called ______.
