draw a graph to show the nature of variation of a) direct current, b) An alternating current with time
Answers
Answer:
Direct current and alternate correct
Explanation:
In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically. The voltage in AC circuits also periodically reverses because the current changes direction.
AC changes its direction sinusoidally.
DC does not change its direction.
Explanation:
Direct current has current and voltage in one direction only whereas in alternating current we get a sinusoidal variable current in magnitude and direction as well.
However this variation is so quick that we are unable to register it with our senses directly. This variation cycle per second is called frequency also measured as hertz.
A direct current can be variable but does not changes its sign, but an alternating current must change its sign after a fixed time interval.
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TOPIC: AC vs DC
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