## anonymous one year ago What is the resistance of a 75W light bulb connected to its proper source voltage of 110V?

clues: 1) 75W light bulb [ie Power] 2) proper source voltage of 110V [ie voltage] from Ohm's Law, we have a lot to play with: $$V = I R; \ I = V/R$$ and, if we remember a fundamental idea: $$P = I \times V$$, then we can manipulate that using Ohm's Law to get: $$P = V^2 / R$$ so we have an equation that allows us to relate resistance to voltage and power. and we can begin to understand why that relationship exists.