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A 0.65-g oil droplet with charge +6.0×10−9C is in a vertical E⃗ field. Ignore the forces...

A 0.65-g oil droplet with charge +6.0×10−9C is in a vertical E⃗ field. Ignore the forces that air exerts on the droplet. What magnitude should the E⃗ field have so that the droplet moves at constant speed?

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Answer #1

Concept - for speed to be constant acceleration must be zero and hence the electric force must be equal to the weight of the droplet as shown below,***********************************************************************************************
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