A Charged Metal Ball of Mass,m Hangs from a String

question 30

Multiple Choice

A charged metal ball of mass,m hangs from a string.An electric field of 15,000 N/C,pointing to the right,is then turned on.After the electric field is turned on,the ball hangs at a 20 degree angle away from the vertical.If the charge on the ball is 6.1 * 10^-6 C,what is the tension in the string?

• A)0.238 N
• B)0.279 N
• C)0.303 N
• D)0.268 N
• E)0.291 N

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