An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is= 2.6 10 -7 C/m 2...

An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is= 2.6 × 10-7C/m2,and the plates are separated by a distance of1.9 × 10-2m.How fast is the electron moving just before it reaches the positive plate?

A small plastic ball of mass 8.94 × 10-3 kg and charge +0.194C is suspended from an insulating thread and hangs between the plates of a capacitor (see the drawing). The ball is in equilibrium, with the thread making an angle of 30.0o with respect to the vertical. The area of each plate is 0.02226 m2. What is the magnitude of the charge on each plate?

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