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Q.

If the current values changes from zero to a maximum value, back to zero and then reverses its direction, the current is


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a

Direct

b

Alternating

c

Pulsating

d

None of the above 

answer is B.

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Detailed Solution

If the current value changes from zero to a maximum value, back to zero and then reverse its direction, the current is called alternating current.
“The electric current that periodically reverses its direction changes its magnitude with time is called an alternating current.” Alternating current is used in households. Thus, if the current values periodically go from zero to a maximum value, back to zero and then reverse its direction, the current is said to be an alternative.
 
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