Answer / amritpal singh sidhu

AC is differ from DC as per given below:
1. In AC transformer can be used but in DC we can't use
transformer.
2. In AC can't be stored but DC can be.
3. In AC there is skin effect but in DC there is no skin
effect.
4. There is revolving field in 3-phase AC machines but
there is no revolving field in DC machines.
5. AC switch gears are cheap,robust,easily maintence but DC
switch gears are not.

Answer / t lakshmi narayana

If DC Voltage(=5v) is applied for a resistor 'R' Heat is
produced.
For same resistor 'R' and same amount of heat an AC voltage
applied is more.

DC = RMS Value * AC

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