For the dumbbell in the figure, let m = 0.02 kg, the distance between the masses is 0.5 m, and E = (600 N/C) î. Initially the dumbbell is at rest and makes an angle of 60° with the x axis. The dumbbell is then released, and when it is momentarily aligned with the electric field, its kinetic energy is 1.2  10-2 J. Determine the magnitude of q.

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Q: 4.00 cm -9 -9 2.00 cm

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.