Question: 67. A point charge (m = 1.0 g) at the end of an insulating string of length 55 cm is observed to be in equilibrium

67. A point charge (m = 1.0 g) at the end of an insulating string of length 55 cm is observed to be in equilibrium in a uniform horizontal electric eld of 12,000 N/ C , when the pendulum's position is as shown, with the charge 12 cm above the lowest (vertical) position. If the eld points to the right as shown, determine the magnitude and sign of the point charge

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