This type of coma is usually reversible once the blood sugar is corrected. Oxygen deprivation: Oxygen is essential for brain function. Cardiac arrest causes a sudden cutoff of blood flow and oxygen to the brain, called hypoxia or anoxia.
The external power supply is the AC power adapter that converts household AC electricity voltages to the much lower DC voltages needed to charge a mobile phone's internal battery.
Electric Power. Electric power is the rate of energy consumption in an electrical circuit. The electric power is measured in units of watts. 1  Electric power definition. 2  Electric power calculation. 3  Power of AC circuits. 4  Power factor. 5  Power calculator.