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Would AC or DC be better to use when charging a mobile phone to make a call?
HorseRider
Answer: DC.
Explanation:
A mobile phone is powered by a battery. A battery stores electric charge. When wires connect the two terminals ['+' terminal and '-' terminal], then a current will flow through the wire from the '+' terminal to the '-' terminal. The electric circuits that operate the cell phone (and any other electronic device) require electric current to operate.
In order to store electric charge in the battery you must apply DC current to the battery.
AC means 'alternating current', which means that half the time the current flows in one direction along the wire that carries the AC, while the current flows in the opposite direction the other half of the time. One cycle of the AC is the total time for the current to flow in both directions. If you tried to charge a battery with AC, during each half of the cycle the current would undo the charging that the previous half-cycle had provided.
There are devices that can convert AC into DC. (They are called converters, or rectifiers.) For a device like a cell phone you would plug the converter into the AC electric outlet, and the converter would produce DC coming out of a cable which you would plug into your cell phone to charge the battery.
The converter is a relatively simple electronic circuit. If you want to know more about it, then ask.
25August,2008
Wiki User
∙ 15y ago
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