Chapter No. 4. Effect of Electric Current,
What are the difference between alternating current and direct current?
Ans.
Alternating current
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Direct Current
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Alternating current varies in magnitude continuously, i.e., oscillatory.
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Magnitude of direct current from a source remains same, i.e., non oscillatory.
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Direction reverses periodically, i.e. after equal intervals of time.
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Direction remains same.
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This type of current is used in electrical household appliances such as electric heater, refrigerator, electric iron, etc.
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This type of current is not used much for household purposes but used in batteries, torches, etc.
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Frequency of A.C. in India is 50 Hz, i.e., its cycle changes in 1/50 second.
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Frequency of D.C. is zero.
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Produced by A.C. generator.
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Produced by D.C. generator.
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Graphical Representation:
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Graphical representation:
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