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The power that a resistor must dissipate is jointly proportional to the square of the current flowing through the resistor and the resistance of the resistor. If a resistor needs to dissipate 63 watts of power when 3 amperes of current is flowing through the resistor whose resistance is 7 ohms comma find the power that a resistor needs to dissipate when 9 amperes of current are flowing through a resistor whose resistance is 5 ohms.

Answer :

Answer: 405 watt

Explanation:

Since the power is I^2 *R

I = current = 9 ampere

R = resistance =5 ohms

P = 9^2 * 5 = 405 watts

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