Because batteries have fixed polarity, whereas AC requires that the polarity is switched, normally 50-60 times per second.
WE can not change the AC power because AC power has two magnitudes one positive and the another one is negative.when we store the AC power in positive half cycle it store the energy and in the negative half cycles it discharge the energy so it is not possible for store the AC power like DC power
No, a 220 volts AC fan cannot run directly from a 12 volts battery. The fan requires a much higher voltage to operate efficiently. You would need a power inverter to convert the 12 volts from the battery to 220 volts AC to power the fan.
A Compaq nc6000 will run on ac power when the battery is dead. The battery is long lasting but it can be charged by using ac power.
No. A battery is considered to be DC power.
Because ac is of changing polarity. It means the positive terminal becomes negative and vice versa... And this happens 60 times a second! So if we want store this, the terminals of the battery should be changed at the same speed as that of the supply which is not practicable ( and in theory it can be done by a electronic switch which constantly changes its polarity). So its better to convert this ac to dc, store it and then again to ac as in the case of a UPS.
No. When a laptop is plugged in, it immediately switches to AC power and begins charging the battery. The battery cannot become "overcharged" because special circuitry in the battery is designed to prevent this.
To store energy produced from a dynamo, you can incorporate a battery into the system. The dynamo generates electricity, which can be used to charge the battery. An inverter can then be connected to the battery to convert the stored DC energy into AC power for use when needed.
* Electric Power * battery
Batteries can provide both AC (alternating current) or DC (direct current) power, depending on the type of device they are connected to. However, most batteries themselves supply DC power. Devices that require AC power typically use an inverter to convert the battery's DC power into AC power.
DC series motors run on DC power. Homes have AC power, not DC power. You could use DC motors in homes if you have a power supply or use a battery, but it is usually more cost effective to use an AC motor.
No, batteries provide DC power.
Usually a car battery, but it also depends on the size of the battery.