The resistance of a conductor is 2 ohm. What's its power when it passes 2 a current? How many joules of heat are produced in one minute?

When passing 2 a current, its power is p = I2R = (2a) 2 × 2 Ω = 8W; t = 1min = 60s, q = i2rt = (2a) 2 × 2 Ω × 60s = 480j A: when passing 2 a current, its power is 8W; the heat generated in 1min is 480j

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