Physics Review Question

Unit: Electricity and magnetism
Year: 1990 Question#: 28
Question: If the charge on two small spheres a fixed distance apart is doubled, the force of attraction between the spheres will be

(1 ) quartered
(2 ) doubled
(3 ) halved
(4 ) quadrupled

What is this question really asking?




Explanation by: zac D 

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Answer 1
quatered

INCORRECT

Because the charge is increased on the two spheres, the force of attraction will also increase. return to top























Answer 2
doubled

INCORRECT

By using the formula F= kq1q2/r2 the charges (represented as q) multiplied together will cause the force of attraction to be quadrupled, not doubled. return to top

Answer 3
halved

INCORRECT

Because the charge on each of the spheres would increase, the force of attraction would also increase. return to top

Answer 4
quadrupled

CORRECT

By using the formula F= kq1q2/r2 multiplying the charges will cause the force to be quadrupled.
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What's this question really asking?

What is the formula for electrostatic force? return to top

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