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Q.

Which one of these is a source of direct current?


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a

Dry cell

b

Ac inverter

c

Ac transformer

d

None of these  

answer is A.

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Detailed Solution

Dry cell is a source of direct current.
The direction of direct current never changes like alternate current and the source to produce direct current are cells solar batteries dc generators etc. An electrical current is referred to as a direct current when it continually flows in one direction. Consequently, this is the current that does not alter throughout time. Any electrical equipment that uses a battery as a power source uses it. Batteries can also be charged with it.
   
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Which one of these is a source of direct current?