
Concept explainers
If you triple the speed of a particle entering a magnetic field, what happens to the radius of the helix that it makes? Select the correct answer, then describe the possible reasoning that could lead a student to choose each of the other answers. You do not need to agree with that reasoning.
a. It triples.
b. It becomes one-third as big.
c. It increases by 9 times.
d. It will not change if the magnetic field does not change.

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Chapter 20 Solutions
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