# ELECTRICAL UNITS Match up correctly: CURRENT (C) Joules Ω

## Presentation on theme: "ELECTRICAL UNITS Match up correctly: CURRENT (C) Joules Ω"— Presentation transcript:

ELECTRICAL UNITS Match up correctly: CURRENT (C) Joules Ω VOLTAGE (V) Ohms A RESISTANCE (R) Coulombs J POWER (P) Volts or Joules/coulomb W CHARGE (????) 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

ELECTRICAL UNITS Match up correctly: CURRENT (C) Joules Ω VOLTAGE (V) Ohms A RESISTANCE (R) Coulombs J POWER (P) Volts or Joules/coulomb W CHARGE (????) 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 Q = C x t V = C x R E = V x Q E = P x t P = V X C V
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 = C x t Q C x t Charge = Current x Time Back to the equations

V = C x R Voltage = Current x Resistance Remember VCR V C x R
Back to the equations

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 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 C Q C x t 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
Remember ! Current Voltage series circuit same everywhere split up between components parallel splits up between branches same across each branch

Who wants to be a millionaire
GAME 1 GAME 2