Alternating Current is safer than Direct Current
AnswerBecause (1) you electricity utility supplies a.c., notd.c., and (2) the ease with which a.c. voltages can be changed and rectified for equipment (e.g. audio equipment) that requires d.c.
The bulb works under AC
We deliver power on the power grid as an AC voltage. That's alternating current, and that's what is available in your home.
AC !
How do you convert 23 voltage DC to 230 Voltage AC?
because in dc current is direct current and it continously varies. so it may be possible that some instrument may be damaged. so to avoid this first we have to convert dc to ac. Actually in our home dc is provided.suppose you want to charge your mobile than you have to convert first dc current to ac current.AnswerAll homes are supplied with AC voltage. The reason for this is that the magnitude of an AC voltage is easily changed using a transformer, and it is easily changed into DC using a rectifier. Changing the voltage level of DC is far more complicated, as is changing it to AC.
Voltage AC was created on 2004-12-14.
AC voltage is varying because it is sinusoidal in nature
Most of the printers offered in the USA have a voltage of 110V AC input and 8V AC output, whereas the printers offered in the Europe have input voltage of 220V AC and output voltage of 8V AC.
The function of any transformer is to change one AC voltage value to another AC voltage value. A step down transformer will transform a higher AC voltage to a lower AC voltage. A step up transformer will transform a lower AC voltage to a higher AC voltage. The transmission of electrical power uses both of these types of transformers. From the generation station the voltage is stepped up to a very high transmission voltage and at the end of the transmission line it is stepped down to a voltage that consumers can utilize.
For part of the AC voltage wave, the capacitor will be above the source voltage, and will discharge until the AC voltage wave increases above the capacitor's stored voltage.
The function of any transformer is to change one AC voltage value to another AC voltage value. A step down transformer will transform a higher AC voltage to a lower AC voltage. A step up transformer will transform a lower AC voltage to a higher AC voltage. The transmission of electrical power uses both of these types of Transformers. From the generation station the voltage is stepped up to a very high transmission voltage and at the end of the transmission line it is stepped down to a voltage that consumers can utilize.
The reason an AC voltage applied across a load resistance produces alternating current is because when you have AC voltage you have to have AC current. If DC voltage is applied, DC current is produced.