Module 10: Chapter 10: Magnetism Assignment
Completion requirements
Answer the following questions:
Chapter 10: Magnetism Assignment (worth 10 points maximum)
This assignment aligns with the following Module 10: Chapter 10: Magnetism objectives:
- Explain the effects of magnetic fields on moving charge (CLO2)(CLO3)
- Describe and differentiate between DC and AC current. (CLO2)(CLO3)
- Explain how a transformer works, and solve problems using the transformer formula. (CLO2)(CLO3)(CLO5)
- Describe how electric motors work and the role of magnetism in their function. (CLO2)(CLO3)
Answer the following questions:
- Infer how you could you use a horseshoe magnet to find the direction north.
- Explain In Europe, generators produce alternating current at a frequency of 50 Hz. Would the electric appliances you use in North America work if you plugged them into an outlet in Europe? Why or why not?
- Predict Two generators are identical except for the loops of wire that rotate through their magnetic fields. One has twice as many turns of wire as the other one does. Which generator would produce the most electric current? Why?
- Explain why a bar magnet will attract an iron nail to either its north pole or its south pole, but attract another magnet to only one of its poles.
- Compare and contrast electromagnetic induction and the formation of electromagnets.
- A step-down transformer reduces a 2,400-V current to 120 V. If the primary coil has 500 turns of wire, how many turns of wire are there on the secondary coil?
- To produce a spark, a spark plug requires a current at about 12,000 V. A car’s engine uses a type of transformer called an induction coil to change the input voltage from 12 V to 12,000 V. In the induction coil, what is the ratio of the number of wire turns on the primary coil to the number of turns on the secondary coil?
- Calculate Number of Domains The magnetic domains in a magnet have an average volume of 0.0001 mm3. If the magnet has dimensions 50 mm by 10 mm by 4 mm, how many domains does the magnet contain?
- The magnetic field strength around a wire at a distance of 1 cm is twice as large as at a distance of 2 cm. How does the field strength at 0.5 cm compare to the field strength at 1 cm?
- A transformer has 1,000 turns of wire in the primary coil and 50 turns in the secondary coil. If the input voltage is 2400 V, what is the output voltage?
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