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17 Cards in this Set
- Front
- Back
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What is electrical power?
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the rate of change in electrical energy
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What is a joule (J)?
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the unit for measuring energy, named for the English scientist James Prescott Joule
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What is a junction point?
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the location where a circuit divides into multiple paths or where multiple paths combine
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What is a kilowatt-hour?
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the product of power, in kilowatts, and time, in hours
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What is a kilowatt-hour?
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the product of power, in kilowatts, and time, in hours
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What is a parallel circuit?
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a closed loop that has several paths for current to travel
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What is power?
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the rate of change in energy; also the rate at which work is done or energy is transformed
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What is a power rating?
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a measurement of how much electrical energy an electrical device consumes for every second it is in use
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What is a series circuit?
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a circuit that has only one path for current to travel
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What is watt (W)?
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one joule of energy transformed in one second, named in honour of Scottish inventor James Watt
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In a series circuit, what are the properties for voltage, resistance and current?
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1) Voltage adds up to total
2) Current stays the same 3) Resistance adds up to total |
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In a parallel circuit, what are the properties for voltage and current?
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1) Voltage stays the same
2) Current adds up to total |
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In a parallel circuit, when a resistor is placed in parallel, what happens to the total resistance and current?
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resistance decreases, current increases
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What is the formula for electrical power?
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power= energy/time
otherwise known as watts= joules/ seconds |
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What is power measured in?
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Watts
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How much is a kilowatt hour?
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3.6 x 10^6
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What is an electrical surge?
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brief surges in voltage
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