Two Tiny Metal Spheres Are Fixed to the Ends of a Non-Conducting

question 33

Multiple Choice

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 . 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.

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