A resistance coil is made by combining two 2.5 ohm resistances in series. A 1.0 V steady voltage is applied across the two ends of the coil for 5 minutes. The heat generated is:

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Solution

Req = R1 + R2 = 2.5 + 2.5 = 5

V = 1V

V = IR
I = V/R
= 1/5
= 0.2A

H = (I^2) * R * t
= (0.2)^2 * 5 * 300 (TIME IN SECONDS)
= 60J

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A resistance coil is made by combining two 2.5 ohm resistances in series. A 1.0 V steady voltage is applied across the two ends of the coil for 5 minutes. The heat generated is:

Req = R1 + R2 = 2.5 + 2.5 = 5 V = 1V V = IR I = V/R = 1/5 = 0.2A H = (I^2) * R * t = (0.2)^2 * 5 * 300 (TIME IN SECONDS) = 60J

Req = R1 + R2 = 2.5 + 2.5 = 5

V = 1V

V = IR
I = V/R
= 1/5
= 0.2A

H = (I^2) * R * t
= (0.2)^2 * 5 * 300 (TIME IN SECONDS)
= 60J