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A Bob of Mass M (M = 0 μ\mu C) Is Held by a Massless String in a Uniform

Question 56

Multiple Choice

   A bob of mass m (m = 0.500 g) , and charge magnitude Q (Q = 50.0  \mu C)  is held by a massless string in a uniform electric field E. If the bob makes an angle of 10.0 degrees with the vertical, then calculate the magnitude of the electric field E and the sign of the bob charge Q. A)  1.73 *10<sup>1</sup> N/C and Q is positive. B)  9.81 *10<sup>1</sup> N/C and Q is negative. C)  9.81 * 10<sup>1</sup> N/C and Q is positive. D)  1.73 *10<sup>1</sup> N/C and Q is negative. E)  1.80 *10<sup>-1</sup> N/C and Q is positive. A bob of mass m (m = 0.500 g) , and charge magnitude Q (Q = 50.0 μ\mu C) is held by a massless string in a uniform electric field E. If the bob makes an angle of 10.0 degrees with the vertical, then calculate the magnitude of the electric field E and the sign of the bob charge Q.


A) 1.73 *101 N/C and Q is positive.
B) 9.81 *101 N/C and Q is negative.
C) 9.81 * 101 N/C and Q is positive.
D) 1.73 *101 N/C and Q is negative.
E) 1.80 *10-1 N/C and Q is positive.

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