Fairly self explanatory.
Power = Current x Voltage
P = I x V
P measured in watts (W)
I measured in amperes (A)
V measured in volts (V)
!!WARNING!!
I represents current. Although A is the symbol for the units, it does not represent current in an equation. If you write P = A x V in an exam you will get marked down because it is wrong.
Power is the rate of energy transferred. Fuses will usually tell you the voltage and current of the device, and from this, the power can be worked out
I think that actually appliances show their power and voltage, so current needs to be worked out, current is what fuses range in anyway
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