PHYS320 Lab 31 Electromagnetic Induction

Experiment 1: Simple Electric Motor

Questions

  1. What orientation of the coil (vertical or horizontal) allows current to flow through assembly? What happens as you rotate the windings 180 degrees from this position?
  2. Why did we scrape one side of the axle tail in step 3? What would happen if we scraped both sides of both ends?
  3. What two items in the experiment could you change to easily increase or decrease the speed it rotates? Remember that the force on the windings is proportional to both the magnetic field strength and the current.
  4. Why do you think the number of loops in the coil is important? If we had only a couple of loops instead of more than 10, how would the force on the coil change? Remember that the force depends on the amount of charge moving in one direction.
  5. Given the strength of the battery and the size of the coil, there are an ideal number of coil turns that make a motor that spins fast without being unstable. What problems do you think you would run into if you made a coil with 50 turns of wire using the same setup?

Photos

PHYS320 Lab 31 Electromagnetic Induction
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