You have three light bulbs; bulb A has a resistance of 240 Ohms, bulb B has a re

Question

You have three light bulbs; bulb A has a resistance of 240 Ohms, bulb B has a resistance of 192 ohms, and bulb C has a resistance of 144 ohms. Each of these bulbs is used for the same amount of time in a setup like the one in the drawing. in each case the speed of teh rod and the magnetic field strength are the same. Rank the setups in descending order, according to how much work the hand in the drawing must do (largest amount of work first).

Chapter 22 Problem 2 Focus on concepts

Explanation / Answer

work done = C>B>A (since W = P*t where P = power = v^2/r => inversly proportional to resistance)

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