Question 221Electricity & Electronics - QMED
70% to passHow is the power dissipated as heat in a direct current circuit calculated?
AE divided by I
BI times R divided by T
CI squared times R
DP divided by R
AI Explanation
The correct answer is C) I squared times R. The power dissipated as heat in a direct current (DC) circuit is calculated using the formula P = I^2 * R, where P is the power, I is the current, and R is the resistance. This formula is derived from Ohm's law and the definition of power, and it is the correct way to calculate the power dissipated as heat in a DC circuit. The other options are incorrect because: A) E divided by I would calculate the voltage, not the power. B) I times R divided by T would calculate the energy, not the power. D) P divided by R would not correctly calculate the power dissipated as heat.
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