Alternating current, direct current & what is frequency? | Physics | Khan Academy
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YouTubeKhan Academy India - English
Alternating current, direct current & what is frequency? | Physics | Khan Academy
Current that keeps changing is direction is called alternating current, (AC) whereas the one that never changes its direction is called direct current (DC). Power can be transmitted with low heating losses in the form of AC (not DC). The frequency of the AC in India is 50 Hz. This means the current changes it's direction 100 times per second ...
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