Question

The power consumed by an electric appliance is computed as the square of the voltage across the appliance divided by the resistance of the appliance. Express the function of the power P, consumed by an appliance with a resistance R, connected to a 220 volt supply.

Answer 1

Given : The power consumed by an electric appliance is computed as the square of the voltage across the appliance divided by the resistance of the appliance.

To Find : Express the function of the power P, consumed by an appliance with a resistance R, connected to a 220 volt supply.

Solution:

P  = V²/R

P = Power

V = Voltage

R = Resistance / Load

V = 220 V

=> P  = 220²/R

=> P  = 48400/R

P as a function of R

P = 48400/R

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