Question 437Electricity & Electronics - Assistant Engineer
70% to passHow is the power dissipated as heat in a direct current circuit calculated?
AP divided by R
BE divided by I
CI times R divided by T
DI squared times R
AI Explanation
The correct answer is D) I squared times R. This formula, I^2 * R, is the standard equation for calculating the power dissipated as heat in a direct current (DC) circuit. It is derived from Ohm's law and represents the relationship between current (I), resistance (R), and power (P). The other options are incorrect because: A) P/R does not account for the current in the circuit; B) E/I does not directly relate to power dissipation; and C) I*R/T is not the correct formula for calculating power dissipation in a DC circuit.
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