A loop of wire lies on a table. A long straight wire rests on the table next to

Question

A loop of wire lies on a table. A long straight wire rests on the table next to or tangent to the loop of wire. The current in the long wire oscillates (e.g. AC current). Does the flux through the loop change with time? If there is an induced voltage is it constant or does it oscillate?

1. The magnetic field changes but it is parallel to the loop so the flux does not change with time; There is no induced voltage.

2. The magnetic field changes and it is perpendicular to the loop so the flux changes with time; The induced voltage is oscillates.

3. The magnetic field changes and it is perpendicular to the loop so the flux changes with time; The induced voltage is constant.

4. The magnetic field changes and it is parallel to the loops o the flux changes with time; The induced voltage is constant.

5. The magnetic field changes and it is parallel to the loop so the flux changes with time; The induced voltage oscillates.

Explanation / Answer

2. The magnetic field changes and it is perpendicular to the loop so the flux changes with time; The induced voltage is oscillates.

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