Electric force charges homework

  • Thread starter danish1991
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1. A student is performing an experiment with two identical small metal balls, A and B. Initially, Ball A contains 6.0-uC net charge with unknown sign and Ball B is neutral. The student brings them in contact and then separated them by 20cm. Both of the balls are remained isolated. Is the electric force between A and B attractive, repulsive or zero?
Please help!
 

Answers and Replies

  • #2
tiny-tim
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hi danish1991! welcome to pf! :wink:

what happens to the charge when the metal balls are in contact?

tell us what you think, and why, and then we'll comment! :smile:
 
  • #3
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Okay, thanks for replying! Its either between repulsive or zero. It cannot be attractive since both charges aren't opposite. I know its repulsive as the correct answer but wouldn't it be zero since ball b is neutral charged and ball a is positive because for attractive both charges gotta be opposite to each other, repulsive they gotta be same since its positive and zero how would it be repulsive?
 
  • #4
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hi danish1991! welcome to pf! :wink:

what happens to the charge when the metal balls are in contact?

tell us what you think, and why, and then we'll comment! :smile:
Okay, thanks for replying! Its either between repulsive or zero. It cannot be attractive since both charges aren't opposite. I know its repulsive as the correct answer but wouldn't it be zero since ball b is neutral charged and ball a is positive because for attractive both charges gotta be opposite to each other, repulsive they gotta be same since its positive and zero how would it be repulsive?
 
  • #5
tiny-tim
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hi danish1991! :smile:

(just got up :zzz:)

you haven't answered my question :wink:
what happens to the charge when the metal balls are in contact?
 

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