A Conducting Bar Moves to the Left at a Constant

question 22

Multiple Choice

A conducting bar moves to the left at a constant speed v on two conducting rails joined at the left as shown.As a result of the bar moving through a constant magnetic field,a current I is induced in the indicated direction.Which one of the following directions is that of the magnetic field?

• A)toward the right
• B)toward the left
• C)parallel to the long axis of the bar
• D)into the page
• E)out of the page

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