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Electric Field

  • Thread starter Ephysics
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  • #1
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Homework Statement


Two point charges of unknown magnitude and sign are places at some distance apart. The electric field is zero at a point not between them , but on the line joining the. Write 2 essential conditions for this to happen.


Homework Equations


E = q1*q2/(4 * pi * epsilon0 * r2)

The Attempt at a Solution


Since the net field is zero at a point outside the line joining the 2 charges ,
they should be oppositely charged.

So, condition one:
The charges should be oppositely charged .

What would be the second condition?

Any help would be highly appreciated.
Thank You.
 
Last edited:

Answers and Replies

  • #2
rl.bhat
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The point should be nearer to the smaller charge.
 
  • #3
Redbelly98
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So, condition one:
The charges should be oppositely charged .

What would be the second condition?

Any help would be highly appreciated.
Thank You.
Hint: try finding the location of zero electric field when the charges are +1 C and -1 C, and 1 m apart.
 

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