A ping-pong ball of mass 3.0 x 10^-4 kg hangs from a light thread 1.0 long between two vertical parallel plates 10.0 cm apart. (refer to diagram below) when the potential difference across the plate is 420 V, the ball comes to equilibrium 1.0 cm to one side of its original position.

a) calculate the electric field strength between the plates.
b) calculate the tension in the thread
c) calculate the magnitude of the electric force deflecting the ball
d) calculate the charge on the ball

Question

A ping-pong ball of mass 3.0 x 10^-4 kg hangs from a light thread 1.0 long between two vertical parallel plates 10.0 cm apart. (refer to diagram below) when the potential difference across the plate is 420 V, the ball comes to equilibrium 1.0 cm to one side of its original position. 

a) calculate the electric field strength between the plates. 
b) calculate the tension in the thread
c) calculate the magnitude of the electric force deflecting the ball
d) calculate the charge on the ball

anonymous · Answer

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