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P2 - electrical circuits by Mind Map: P2 - electrical circuits
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P2 - electrical circuits

measurements

voltage

voltmeter, parallel

volts (V)

current

flow of charge

ammeter, series

amps (A)

power

energy used per second

Watts (W)

component graphs

resistor

straight line

bulb

curve

diode

current only flows when voltage is grater than 0.6V

plug

live

fuse

brown

earth

green and yellow

neutral

blue

insulation

safety

earth lead

current flows straight to earth

protects against electric shock

fuse

melts if current is too big

no protection against electric shock

miniature circuit breaker (mcb)

replace fuses

electromagnet

breaks circuit if current is too big

no protection against electric shock

residual current device (rcd)

protects against electric shocks

compares current in live and neutral wires

should be used in gardens

UK = 240V (US and Europe=110V)