Radiation for life

lollyskinner99
Slide Set by lollyskinner99, updated more than 1 year ago
lollyskinner99
Created by lollyskinner99 over 4 years ago
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P4
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Slide 1

    Resistance 
    variable resistor or rheostat changes resistance longer lengths of wire = more resistance  thinner wires = more resistance  voltage measured in volts using a voltmeter connected in parallel  fixed resistor - as voltage increases = current increasing  fixed power supply - as resistance increases = current decreasing  formulas:resistance = voltage/Current voltage = current x resistancecurrent = voltage/resistance 

Slide 2

    Live, neutral and earth wires
    live wire carries high voltage around house neutral wire completes the circuit providing a return path for the current  earth wire
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