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Power
Rate of energy transfer or amount of energy transferred per second
depends on
voltage (p.d)
current
P = IV
Watt
Joule per second (J/s)
Fuse
device designed to cut off flow of electricity to an appliance if the current becomes too large
How Fuses Work
glass cylinder containing a thin metal wire
if current becomes too large
wire heats up and melts
causes wire to break, breaking the circuit and stopping the current
makes sure current doesn’t keep flowing through the circuit and causing more damage to equipment, or causing a fire