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EET113-Ch4
Ch 4 Glossary
Question | Answer |
---|---|
Circuit breaker | A two-terminal device designed to ensure that current levels do not exceed safe levels. If "tripped," it can be reset with a switch or a reset button. |
Diode | A semiconductor device whose behavior is much like that of a simple switch; that is, it will pass cuiTent ideally in only one direction when operating within specified limits. |
Efficiency (η) | A ratio of output to input power that provides immediate information about the energy-converting characteristics of a system. |
Energy (W) | A quantity whose change in state is determined by the product of the rate of conversion (P) and the period involved (t). It is measured in joules (J) or wattseconds (Ws). |
Fuse | A two-terminal device whose sole purpose is to ensure that current levels in a circuit do not exceed safe levels. |
Horsepower (hp) | Equivalent to 746 watts in the electrical system. |
Kilowatthour meter | An instrument for measuring kilowatt hours of energy supplied to a residential or commercial user of electricity. |
Ohm's law | An equation that establishes a relationship among the current, voltage, and resistance of an electrical system. |
Power | An indication of how much work can be done in a specified amount of time: a rate of doing work. It is measured in joules/second (J/s) or watts (W). |