No. The voltage difference is too great. There are types of adapters in the market place that have variable set point voltages. You can usually go from 1.5,3,4.5,6,7.5,9 and 12 volts with these types of wall plug in adapters.These types of adapters also come with different end type connectors for connecting to many different devices.
There are many electronics today that run on 12 volt DC power. The good news for anyone who is traveling is that you can use a 12 volt AC adapter 12 VAC 2A.
No, the excessive voltage will destroy the equipment, unless the fuse trips (hopefully) ...
The output of a 12 volt transformer is an alternating current (AC). Your adapter is a 12 volt transformer but it has a built in half wave or, more expensive ones, a full wave bridge rectifier. What this rectifier does is change AC to DC. Bridge rectifiers are cheap to purchase. Connect it to the output of the 12 volt transformer and you will get a DC voltage. Great little project.
No. You should use the adapter specified for the DVD player. Using the wrong adapter can damage the DVD player and/or the adapter and/or cause a fire.
No, the battery is DC not AC.
No you shouldn't use a 14 volt 5 amp adapter on a 12 volt 5 amp device unless you know for sure that the 12 volt device has an internal voltage regulator that will lower the voltage to the correct voltage range the device was designed to use. As long as you always take care to check the output voltage with a voltmeter first, to be sure that the voltage from the adapter is regulated, meaning that it does not rise when a lower current in amps is drawn from it, you may be able to use an adapter that gives the right voltage at a higher amp output rating than the device actually takes. (For example, it may be possible to use a 12 volt 7 amp adapter for a 12 volt 5 amp device.)
No. You need 12 volt AC to run a 12 volt AC motor, not 12 volt DC.
No, 12 volt AC is a different from 12 volt DC. Have a second look at the 12 AC volt adapter's output label. Most adapters contain a bridge rectifier in them that makes a conversion within the adapter. An example of this is in phone chargers.
No, it is not recommended to substitute a 12 volt 0.5 amp AC adapter with a 7.5 volt 1 amp adapter. The voltage and amperage ratings need to match the requirements of the device you are powering. Using a lower voltage adapter may not provide enough power, and using a higher voltage adapter can potentially damage the device.
No, auto batteries are DC not AC.
For a 7.2-watt, 12-volt LED lighting unit, you need a power adapter that provides 12 volts and at least 0.6 amps (since 7.2 watts divided by 12 volts equals 0.6 amps). It's advisable to choose an adapter with a slightly higher current rating, such as 1 amp, to ensure proper operation and avoid overloading the adapter. Make sure the adapter has the correct connector type and polarity to match your LED lighting unit.
An AC Adapter converts direct current into alternating current. It is handy when you only have 12 volt battery current and you need to use power tools which only run on alternating current.