Competency #8
Explain the differences and interconnections between electricity and magnetism
Learning Objective a
- a. Explain current, voltage, and resistance and how they are related (Ohm's Law)
Question
Write down your answer to the following question:
Which statement is correct?
A certain piece of copper wire has an electrical resistance of 4 W . Indicate what effect each of the following changes will have on the wire's resistance.
- The length of the wire is doubled
- The thickness of the wire is doubled
- The material is changed from copper to plastic
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