ELECTRICAL UNITS Match up correctly: CURRENT (I) Joules Ω

ELECTRICAL UNITS Match up correctly: CURRENT (I) Joules Ω VOLTAGE (V) Ohms A RESISTANCE (R) Coulombs J POWER (P) Volts or Joules/coulomb W CHARGE (Q) Amps or Coulombs/second V ENERGY (E) Watts or Joules/second C Once you have done this – write down as many symbol equations as you can remember for this unit

The Equations V I x R • Q = I x t • V = C x R • E = V x Q • E = P x t • P = V X I E V x Q Q I x t E P x t P V x I Where do they all come from?

Electricity • Revise the concept of charge and current • Revise the concept of voltage and energy • Revise the concept of Parallel and Series Circuits • Back to the equations

Q Ix t Q = Ix t • Charge = Current x Time Back to the equations

V I x R V = Ix R • Voltage = Current x Resistance • Remember VCR Back to the equations

E V x Q E = V x Q • Energy = Voltage (pd) x Charge • One Volt = One Joule given to One Coulomb of Charge Back to the equations

E P x t E = P x t • Energy = Power x Time • The Power is the rate at which energy is transferred A Kettle uses 2300 Watts of power. If it is switched on for 5 minutes how much energy does it use? Back to the equations

P V x I P = V x I • Power = Voltage x Current • Increasing Voltage or Current means the rate of energy transfer increases A Kettle uses 2300 Watts of power. If it is switched on for 5 minutes how much energy does it use? The Kettle runs of mains electricity, What current does the kettle draw? Back to the equations

Parallel and Series Circuits

GAME 1 GAME 2 Who wants to be a millionaire

ELECTRICAL UNITS Match up correctly: CURRENT (I) Joules Ω