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Ohm's Law - Technical MCQs

Q1:

Power supplies differ from batteries in that

A power supply output voltages are ac and not dc

B power supply voltages are not stable

C power supplies are low-current devices

D None of the above

ANS:D - None of the above

I think the power supply is what we get in our home from electric cooperation and Battery is a static form of energy which is used in TV remote.