Posts tagged Electrical Principles

Fuse Wire

with free top tip included ‘Before renewing see that the Main Switch is OFF’.. well guess they need their customers to return to consume more of their products… c1930’s


Electrical Principles

Electrical Principles


Power (in watts) = Volts x Current (in amps)

so with a bit of algebra , I = p/v   so a 20 watt lamp at 12 volts would pull 1.6 amps,  but a 20 watt lamp at domestic mains voltage of 240 volts would pull less that 0.1 amp.


 Volts = Current (in amps) * Resistance (in Ohms)

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