Discharge devices
Discharge devices[edit]
Obsolete:
- Mercury arc rectifier
- Voltage regulator tube
- Nixie tube
Power sources[edit]
Sources of electrical power:
- Battery – acid- or alkali-based power supply.
- Fuel cell – an electrochemical generator
- Power supply – usually a main hook-up
- Photovoltaic device – generates electricity from light
- Thermoelectric generator – generates electricity from temperature gradients
- Electrical generator – an electromechanical power source
- Piezoelectric generator - generates electricity from mechanical strain
- Van de Graaff generator - generates electricity from friction
Passive components[edit]
Components incapable of controlling current by means of another electrical signal are called passive devices. Resistors, capacitors, inductors, and transformers are all considered passive devices.
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