Question

use the drop-down menus to complete each description about the experimental results. first, we verified that magnet movement would induce a current. each time the magnet moved near the wire loop, whether it was moving forward or in reverse, a current registered. when the magnet was stationary, a current of milliamps was generated. under normal magnet polarity, whenever the magnet was moving toward the loop, the induced current had a value, and a value if the magnet was moving in reverse. under reversed polarity, we found the results to be exactly in current direction, while the current maximums were.

Explanation:

To solve this, we use principles of electromagnetic induction (Faraday's and Lenz's laws):

Step 1: Stationary Magnet

By Faraday’s law, a changing magnetic flux induces current. A stationary magnet has no flux change, so induced current is \( \boldsymbol{0} \) milliamps.

Step 2: Normal Polarity - Magnet Moving Toward Loop

Lenz’s law: Current opposes the change. If magnet moves toward loop (increasing flux), current has a positive (or specific sign) value (direction depends on setup, but magnitude is non - zero).

Step 3: Normal Polarity - Magnet Moving Reverse

When magnet moves away (decreasing flux), Lenz’s law reverses the current’s direction, so it has a negative (opposite sign) value.

Step 4: Reversed Polarity - Current Direction

Reversing magnet polarity reverses the magnetic field direction. The induced current’s direction (to oppose the change) will be reversed (opposite to normal polarity for the same motion).

Step 5: Reversed Polarity - Current Maximums

The magnitude of induced current depends on flux change rate (same magnet speed, same loop), so current maximums are equal (same magnitude, opposite direction).

Answer:

• Stationary magnet: \( \boldsymbol{0} \) milliamps.
• Toward loop (normal polarity): Positive (or specific sign, e.g., “+”) value.
• Reverse (normal polarity): Negative (or specific sign, e.g., “-”) value.
• Reversed polarity (direction): Reversed.
• Reversed polarity (maximums): Equal.

(Note: Exact dropdown options depend on the provided choices, but the logic follows electromagnetic induction laws.)