quiz 14 Flashcards
State the equation linking current, potential difference and power using words.
Power = Current x Potential Difference
What symbol is used instead of writing the word ‘power’?
P
State the equation linking time, energy and power using symbols.
E = Pt
State the unit of power
watts or W
State the unit of current.
amps or A
What is the unit of charge?
coulomb or C
State the equation linking current, resistance and power using symbols
P = I²R
State the equation linking potential difference, charge and energy using symbols.
E = QV
State the equation linking potential difference, resistance and current using symbols.
V = IR
What is the name given to the system of cables and transformers linking power stations to consumers?
The National Grid
State the equation linking current, resistance and power using words
Power = current² x resistance
State the equation linking current, charge and time using symbols.
Q = It
State the equation linking current, potential difference and power using symbols.
P = IV
State the equation linking time, energy and power using words.
Energy = Power x time
What store of energy does an electric motor have?
Kinetic
