no the dc unit will be damaged .
but , if you have no other options left then you have to use a rectifier to convert the ac into dc .
trains can run on both ac and dc. In India trains run with dc and there is a plan to convert them to move on ac by 2010
it is completely safe
AC
If the power tool has brushes to bring the current to the armature it is classed as an universal motor. It will run on DC as long as the voltage is the same potential. On a welding machine the 120 volt receptacle is a DC output and the grinders, drills, etc that are plugged into it work fine.
No. A bulb can run a AC just a easily as DC.
The power supply in most cars is DC. The alternator may produce AC power, but it is then run through a rectifier, providing DC power.
bcoz it is costly to develop ac...and dc can be store nor ac
The easiest way would be to convert the AC power to DC by using a rectifier diode and a filter capacitor. In that way you can now run your DC motor on DC.
You "could" run a 120V 5A window AC unit off a 12V deep cell battery but, assuming 100% efficiency (something you can never get), you would need an inverter or motor-generator set and 50A out of the battery to run, and maybe 5 or 10 times that to start.
Motors are available that run on either.
No.
Some can be, and some are run by electricity. They all run on electricity. But some run on DC battery voltage and some run on AC household voltage. Some can even run on DC or AC voltage. All automobile radios run on DC battery voltage.