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Power dissipated in a resistor under DC:
AV + I
BP = VI = I²R = V²/R
CV × I
DV/I
Answer & Solution
Correct answer: B. P = VI = I²R = V²/R
DC resistor power: P = VI. Using Ohm's law (V=IR), three forms: VI, I²R, V²/R. Always positive (resistor dissipates energy as heat). Energy: E = P × t.
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