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Magnetic Effects of Electric Current
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01/08/2021 7:50 pm
Topic starter
(a) What do you understand by the terms ‘direct current’ and ‘alternating current’?
(b) Name some sources of direct current and some of alternating current.
(c) State an important advantage of alternating current over direct current.
(d) What is the frequency of A.C. supply in India?
1 Answer
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01/08/2021 7:51 pm
(a) If the current flows in one direction only, it is known as direct current; and if the current reverses direction after equal intervals of time, it is called alternating current.
(b) Source of DC are dry cell, car battery, DC generator etc.
Source of AC are AC generator, bicycle dynamos etc.
(c) An important advantage of AC over DC is that AC can be transmitted over long distances without much loss of electrical energy.
(d) 50Hz.