A point charge (m = 1.0 gram) at the end of an insulating cord of length 55 cm is observed to be in equilibrium in a uniform horizontal electric field of 9500 N/C, when the pendulum's position is as shown in Fig. 16–66, with the charge 12 cm above the lowest (vertical) position. If the field points to the right in Fig. 16–66, determine the magnitude and sign of the point charge. l = 55 cm m -12 cm FIGURE 16-66 Problem 57.

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A point charge (m = 1.0 gram) at the end of an insulating
cord of length 55 cm is observed to be in equilibrium in a
uniform horizontal electric field of 9500 N/C, when the
pendulum's position is as shown in Fig. 16–66, with the
charge 12 cm above the lowest
(vertical) position. If the field
points to the right in Fig. 16–66,
determine the magnitude and
sign of the point charge.
l = 55 cm
m
-12 cm
FIGURE 16-66
Problem 57.
Transcribed Image Text:A point charge (m = 1.0 gram) at the end of an insulating cord of length 55 cm is observed to be in equilibrium in a uniform horizontal electric field of 9500 N/C, when the pendulum's position is as shown in Fig. 16–66, with the charge 12 cm above the lowest (vertical) position. If the field points to the right in Fig. 16–66, determine the magnitude and sign of the point charge. l = 55 cm m -12 cm FIGURE 16-66 Problem 57.
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