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The resistance of a conductor is 2 Ω. How many joules of heat are generated in one minute when the current is 2A?
T = 1min = 60s, q = i2rt = (2a) 2 × 2 Ω × 60s = 480j A: the heat generated in 1min is 480j
Current is 1a, resistance is 50 ohm, can you connect on 220 V power supply how to calculate?
No, beyond the rated current, 220 divided by 50 = 4.4, greater than one
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