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AP Physics 2
12.4 Electromagnetic Induction and Faraday’s Law
IntermediateMCQMathematicalConceptual13.7k
A horizontal diagram showing a rectangular bar magnet on the left and a cylindrical solenoid on the right. The bar magnet is divided into two halves, with the left half labeled N and the right half labeled S. A horizontal arrow pointing to the right above the magnet indicates its velocity v toward the solenoid. To the right of the magnet is a stationary cylindrical solenoid with five visible loops of wire forming a closed loop with a simple resistor symbol at the bottom. The left face of the solenoid is positioned directly across from the south pole of the bar magnet. No other labels, lines, text, or axes appear.
A bar magnet moving toward the left end of a stationary solenoid.
A bar magnet is oriented horizontally with its south pole facing the left end of a stationary, closed-circuit solenoid. In Trial 1, the bar magnet is moved to the right toward the solenoid at a constant speed v. In Trial 2, the bar magnet is moved to the left away from the solenoid at the same constant speed v. Which of the following correctly identifies the magnetic pole induced at the left end of the solenoid and the direction of the magnetic force exerted by the solenoid on the bar magnet for each trial?

TrialLeft End of SolenoidForce on Magnet
1 (Approaching)??
2 (Receding)??

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