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A resistor with a 15.0-V potential difference across its ends develops thermal energy at a rate of 327 W.

Part A

What is its resistance?

Part B

What is the current in the resistor?

pur-new-sol

Answer:

a) The power dissipated by a resistor is given by P = V²/R

Power = 327 W

Voltage (V) = 15V

Hence R = V²/P =15 x 15 /327 ohm = 0.69 ohm

b) Current in the resistor is given by V = iR
Hence i = V/R = 15/ 0.69 = 21.74 Ampere

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