No, the voltage is too high.
No
No, get a matching transformer and check the polarity and the milliamps.
No, the voltage of the replacement adapter must always be IDENTICAL to the original adapter and the current of the replacement adapter must be the same or larger than the original adapter.Trying to use a 9 Volt adapter to replace a 5 Volt adapter will almost certainly completely destroy the device the moment you plug it in.You did not say whether the adapters provided AC or DC or the polarity if DC. Either way both the replacement adapter and the original adapter must be IDENTICAL in this respect.
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, attempting to do so will destroy the adapter. It maywork for a short time, but it certainly won't work for long.An adapter should be sized so that it does not normally exceed 80% of it's duty rating. The maximum rating should only be used for brief periods.
To calculate the fuse rating for a 600 watt appliance on a 220 volt supply, you can use the formula: Fuse rating = (Power/Voltage). In this case, it would be 600 watts / 220 volts, which equals approximately 2.73 amps. Therefore, you would need a 3 amp fuse for the 600 watt appliance on a 220 volt supply.
The nook can be recharged by connecting the micro usb to a computer or any usb adapter( 5 Volt).
no
The -5 volt is used in the dynamic RAM chip for Memory Refresh
It is generally safe to run a 4.3V device with a 5V power adapter, as the device should only draw the amount of voltage it is designed for. However, there is a slight risk of damaging the device if the voltage is consistently higher than the recommended level.
No you can not. The power supply output of 5 volts is under sized. There is no way that a 45 volt device would operate from it. You will need to find a power supply of 45 volts.
You could burn out the device you're powering.