2006-09-02 02:39:42 · 6 answers · asked by chitti b 1 in Science & Mathematics ➔ Physics
i suppose it is bcoz ac always changes its direction
from positive to negetive and vicevirsa.............
it does not have fixed frequency
this could be the ans
:-)
2006-09-02 02:46:56 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Batteries generally store a chemical that creates electricity when it reacts with another substance. The electrons ( minus or -) are collected on one conductor which leaves the material which lost the electrons ( positve or +) on the other conductor. When the two conductors are connected together in a circuit (with a light bulb, for instance) the electricity will flow from the negative conductor to the positive conductor. This is DC or direct current.
AC current, on the other hand, changes direction constantly - with the conductors alternating between positive and negative at a set rate or frequency. A battery, obviously, cannot do this.
So called inverters, however, can be used to change the DC current from the battery to AC current.
2006-09-02 10:09:02 · answer #2 · answered by LeAnne 7 · 0⤊ 0⤋
Lots of answers are good , and based on their interpretation of your Q?
Here is mine.
A.C. Electric energy can be stored in many ways, here are the two most used method.
1. Converter it to DC and store it by charging battery. The battery can be used as energy source, as needed and by re-converting to A.C., an A.C. motor could be operated also.
2. There are huge amount of A.C. energy stored by at least one energy producer in USA. (producer of Hydroelectric energy).
During non peak hours the excess power is use to pump water back up the hill in an auxiliary reservoir/lake, at an intermediate level.
At the peak hours second(auxiliary) plant is activated to meet the extra demand, again as the demand drops the auxiliary plant is taken out of the lines and shut down and excess power from the main plant is used to replenish the auxiliary lake, which can supply water to run the auxiliary hydroelectric plant as needed.
2006-09-02 11:01:16 · answer #3 · answered by minootoo 7 · 0⤊ 0⤋
You don't store current at all. Current is electron flow - what is stored is energy, usually as voltage. Charged batteries do only give DC voltage, though - that's probably why you asked.
Why can't we make an AC battery? Because current flows from high voltage to low voltage, and the battery only stores a voltage difference. Therefore, unless you have some special circuitry surrounding it, it can only deliver current one way. And that's what DC - instead of AC - current is: current that continuously flows one way.
2006-09-02 09:50:15 · answer #4 · answered by peri_renna 3 · 1⤊ 0⤋
Current means flow of electron, whether it is AC or DC. We even cannot store DC current. What we store is the energy in the form of chemicals causing to flow electrons when connected through their terminals. Now a days inverter are in use. A battery with chemicals is the storing place of energy. It is recharged with AC converted into DC and it supplies DC which is converted into AC by the circuit of the inverter.
2006-09-02 10:14:09 · answer #5 · answered by ars32 3 · 0⤊ 0⤋
Direct current is naturally available while Alternating current is a man made(artificial).So, naturally AC cannot be stored.
2006-09-02 14:39:25 · answer #6 · answered by dwarf 3 · 0⤊ 0⤋