Electrical Energy and Power Concepts
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These flashcards cover fundamental electrical concepts including current, voltage, power, and energy calculations relevant to the lecture notes.
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10 Terms
Current
The flow of electric charge, typically measured in amperes (A).
Voltage
The electric potential difference between two points, measured in volts (V).
Electrical Energy
The energy carried by electric charges as they move through a circuit.
Power (P)
The rate at which electrical energy is consumed or produced, calculated as P = E/t, measured in watts (W).
kWh
A unit of energy equivalent to one kilowatt (1 kW) used for one hour.
Energy Cost
The total cost of energy consumption, calculated by multiplying kWh used by the cost per kWh.
Efficiency
A measure of how much useful output energy is obtained from the total input energy, expressed as Useful OUT / Total IN.
Power Rating
The amount of power a device consumes, often expressed in kilowatts (kW).
TV Daily Cost
The cost incurred to run a TV, calculated by multiplying the kWh it consumes by the cost per unit.
1 kWh = 30p
Indicates that one kilowatt-hour of energy costs thirty pence.
Note 
Flashcards (66)