The South Pole of a Bar Magnet Is Moved Toward

question 40

Multiple Choice

The south pole of a bar magnet is moved toward a short helical coil of wire (solenoid) along the axis of the coil. The coil has 100 turns and the ends of the coil are connected to form a closed circuit. If the coil is replaced with a single loop of the same type of wire, and the magnet is moved exactly as before, the magnet experiences a force that is

• A) the same as before.
• B) attractive and 100 times larger.
• C) attractive and 100 times smaller.
• D) repulsive and 100 times larger.
• E) repulsive and 100 times smaller.

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