Using a 12V 400mA power supply instead of a 12V 500mA power supply may result in insufficient current to power the device properly. This could cause the device to not function correctly or potentially damage the power supply due to overloading. It is generally recommended to use a power supply that meets or exceeds the required current specifications of the device.
Yes you can. But it may damage your computers power supply.
As long as the batteries are putting out the exact same voltage, then yes you can use a battery with a higher ma rating.
Using a 12V 500mA power supply instead of a 12V 300mA power supply will likely be fine as long as the voltage matches, but the higher current capacity (500mA) means the power supply can deliver more current if needed by the device. The device will only draw the current it needs, so having a higher current capacity power supply should not cause any issues.
Using a 12V 600mA power supply instead of a 12V 500mA one shouldn't be an issue if the device connected has a current rating under 600mA. However, it's important to ensure that the voltage matches and the device does not draw more current than the power supply can provide to prevent damage.
Using a 600mA adaptor instead of a 500mA one could potentially supply more current to the device than it is designed for. Depending on the device's circuitry, this can lead to overheating and damage, especially if the device is not designed to handle the extra current. It's generally safer to use an adaptor with the recommended current rating for the device.
No, you cannot.
500mA = 500 miliamper 1000mA = 1 amp so 500mA = .5 amps
1amp 3 max depends on what rating lamp it is (or bulb).
p=i square x r = 500ma * 500ma = .25 * 4.7k = 1175 watts
1 amp is larger than 1 milliamp. 1 amp is equivalent to 1000 milliamps.
NO