A tiny 0.60g ball carries a charge of magnitude f 8.0uC. It is suspended by a thread in a downward 300 N/C electric field. What is the tension in the thread if the charge on the ball is negative? - Positive?

4 answers

Tension= mg+electric force
The direction of the E field is the direction of a positive charge, so if the charge is positive, they add.
If the charge is negative, they are in opposite directions.
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