Two tiny metal spheres are fixed to the ends of a non-conducting string of length . Equal charges, +q, are placed on the metal spheres. Randall says that the force on the string has magnitude . Tilden says that the tension in the string has magnitude

style="vertical-align: -22px;" width="71px" height="59px" align="absmiddle" />. Which one, if either, is correct?



A.

Randall, because both charges exert forces on the string, but the tension is .

B.
Tilden, because both charges exert forces on the string, but the net force is .

C.
Both are correct, because both charges exert forces on the string.

D.
Neither is correct, because both the tension and the force have magnitude .

E.
Neither is correct, because the tension is , but the net force is 0.


Answer: E

Physics & Space Science

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