A Conducting Bar of Length L Rotates with a Constant

question 42

Multiple Choice

A conducting bar of length L rotates with a constant angular speed of +2.0 rad/s about a pivot P at one end,as shown.A uniform magnetic field (magnitude = 0.20 T) is directed into the paper.If L = 0.40 m,what is the potential difference,V_A − V_P?

• A)−12 mV
• B)+8.0 mV
• C)−8.0 mV
• D)+12 mV
• E)−16 mV

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