Question

what is fifference blw AC and DC

Answer 1

Hey mate ! here's ur answer.

AC is the alternate current which means if the current reverse the direction after equal interval of time is known as Alternating current.

DC is the direct current which means if the current flows only in one direction is called Direct current.
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Answer 2

@AC@
when an alternating e.m.f. is connected to an electrical circuit,it is called as a.c. circuit. In a.c. circuit resistor,capacitor,inductor or the combination of these elements are used.
The e.m.f. & current in these a.c. circuit are at Same frequency but phase may or may not differ across the elements used. we will study a.c. circuit with resistor,inductor & capacitor..

@DC@
Let us see when DMM is operated for DC voltage measurement how it reads input DC voltage by displaying digital number. when a DC VOLTAGE is applied across it's input probes then it is selected by an input attenuator is nothing but a potential dividers made up of resistance dividers. this is very similar to multi-range DC voltmeter of an analog multimeter...

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