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Q.

Which of the following is not a property of direct current?


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a

It flows in one direction only

b

It is constant in time

c

They are sinusoidal waves

d

They are represented by straight line against time 

answer is C.

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Detailed Solution

The direct current waves are not sinusoidal.
Direct current is the transfer of electric charge in just one direction whose magnitude is either variable or constant, but the flow direction in a conductor remains the same. Sources of direct current are voltaic cells, dry cells, batteries, DC generators etc., and graphically it is shown as
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