When a positive charge is released and moves along an electric field line, it moves to a position of
A. lower potential and lower potential energy.
B. lower potential and higher potential energy.
C. higher potential and lower potential energy.
D. higher potential and higher potential energy.
E. greater magnitude of the electric field.
Answer: A
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A) 60 N to the right. B) 60 N to the left. C) 30 N to the left. D) none of the above
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A plant that is 4.1 cm tall is 10.3 cm from a converging lens. You observe that the image of this plant is virtual and 6.2 cm tall. What is the focal length of the lens?
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