Physics · Electrical energy and power, electrical resistivity and conductivity
is applied when
\( P=\frac{V^{2}}{R} \) is applied when
- A. Current is constant
- B. Potential difference is constant
- C. Resistance is constant
- D. None
Step-by-step solution
The formula P = V^2/R is derived from P = VI and Ohm's law (V=IR). When the potential difference (V) across a resistor is constant, the power dissipated is proportional to V^2 and inversely proportional to R. Thus, this form is typically applied when V is constant.
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