10: Electricity and circuits
Alternating current- ✅current flow consisting of charges that continually
change direction
✅
ammeter- a device connected in series with a component to measure the
current that flows through it
amp ( A )- ✅unit of current
Circuit breaker-✅A safety device that cuts off the power supply if a surge
of current passes through it
coulomb- ✅unit of charge
currents at a junction-✅the sum of current entering a junction must always
equal the sum of currents leaving it
✅
diode- a component that only allows current to flow in the forward
direction
direct current- ✅current flow consisting of charges flowing in a single
direction only
✅
earth wire- the green and yellow striped safety wire connected to metal
casings that prevents an appliance from becoming live
✅the rate of flow of charge
electric current-
energy transfers in circuits-✅electrical energy is transferred to thermal
energy when current does work against a resistance
Alternating current- ✅current flow consisting of charges that continually
change direction
✅
ammeter- a device connected in series with a component to measure the
current that flows through it
amp ( A )- ✅unit of current
Circuit breaker-✅A safety device that cuts off the power supply if a surge
of current passes through it
coulomb- ✅unit of charge
currents at a junction-✅the sum of current entering a junction must always
equal the sum of currents leaving it
✅
diode- a component that only allows current to flow in the forward
direction
direct current- ✅current flow consisting of charges flowing in a single
direction only
✅
earth wire- the green and yellow striped safety wire connected to metal
casings that prevents an appliance from becoming live
✅the rate of flow of charge
electric current-
energy transfers in circuits-✅electrical energy is transferred to thermal
energy when current does work against a resistance
