A Conducting Bar of Length L Rotates in a Counterclockwise

question 40

Multiple Choice

A conducting bar of length L rotates in a counterclockwise direction 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_B?

• A)+24 mV
• B)-24 mV
• C)+16 mV
• D)-16 mV
• E)+32 mV

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