Physics I / Current, Resistance, and DC Circuits
Practice question · Select all that apply

Which formulas give the power dissipated in a resistor?

Hints
  1. Substitute Ohm's law into the basic product and see what forms appear.
  2. Check the exponents, one candidate squares the wrong quantity.
Show the answer
  • A. P=I2RP = I^{2}R
  • C. P=V2/RP = V^{2}/R
  • D. P=IVP = IV
Why

All three are equivalent via V=IRV = IR; P=IR2P = IR^{2} has the wrong exponent.

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