Magnetism and Electromagnetic Induction unit test

A test on this unit alone, marked as a percentage and a letter grade — for the test your class is actually sitting, rather than for May. Answer everything, then submit once: seeing the answer to question 3 before attempting question 4 makes the final percentage meaningless.

Paper 1 Paper 2 Paper 3

Each paper is built from this unit’s 22 terms and is the same for everyone, so a teacher can assign “Unit 4, Paper 1” and every student sits the identical test. Multiple choice is marked objectively; the written sections you mark yourself against the model answer and rubric.

Suggested time 31 min 28 points0/17 attempted

Faraday's law

Magnetic force does no work

Flux through a rotating loop

Force on a current-carrying wire

Lenz's law

Applying Lenz's law to a falling magnet

Magnetic flux

Why magnetic monopoles do not appear

Determining the field direction around a wire

Eddy currents

Generator principle

Right-hand rule for force

Short answer 1. Define or explain: Transformers

3 pts

Short answer 2. Define or explain: Motor principle

3 pts

Short answer 3. Define or explain: Domains and ferromagnetism

3 pts

Short answer 4. Define or explain: Force on a moving charge

3 pts

Free response

4 pts

A long straight wire carries a steady current I to the right. A rectangular conducting loop is placed below the wire and is pulled downward at a constant velocity v.

Determine the direction of the induced current in the loop. Justify your answer using Lenz's Law.

As the loop moves further away, what happens to the magnitude of the induced current? Explain.