Practice question · Numerical answer
A resistor of 8 Ω carries a current of 2.5 A. Compute the power dissipated in watts.
Hints
- Power is current squared times resistance.
- Compute 2.5^2 x 8.
Show the answer
50 (answers within ±0.5 count)
Why
W. The quadratic dependence on current is why transmission lines run at high voltage and low current.
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