All SAT II Physics Resources
Example Questions
Example Question #21 : Sat Subject Test In Physics
On which of the following does the amount of work required to move a charge in an electric field depend?
Possible Answers:
Only the change in potential
Both the potential and the path traveled
Neither the potential nor the path traveled
Only the path traveled
Only the magnetic field
Correct answer:
Only the change in potential
Explanation:
Work done by electric field is defined:
Notice that the only variable in the equation is the potential, so this is the only quantity on which work depends.
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