A resistance of 25 Ω is connected to a 12 V battery. Calculate the heat energy in joules generated per minute.

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Solution

V =12 V
R = 25 Ω
t = 1 minute = 60 s

Current, I = $\frac{V}{R} = \frac{12}{25} = 0.48 A$

Heat generated = I²Rt = (0.48)²(25)(60) = 345.6 J

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A resistance of 25 Ω is connected to a 12 V battery. Calculate the heat energy in joules generated per minute.

V =12 V R = 25 Ω t = 1 minute = 60 s Current, I = VR=1225=0.48 A Heat generated = I2Rt = (0.48)2(25)(60) = 345.6 J

V =12 V
R = 25 Ω
t = 1 minute = 60 s

Current, I = $\frac{V}{R} = \frac{12}{25} = 0.48 A$

Heat generated = I²Rt = (0.48)²(25)(60) = 345.6 J