# Homework Help: Electric Field

1. Dec 11, 2003

### roy5995

Would this work?

Find the electric fields a pont A & B. Then add the two fields ??? Or would you subtract the two fields ???

Use the formula $${E} = k\frac{Q}{r^2}$$

Is the field on point A & B going left or right?

By Reasoning does the electric field at A have to be bigger that B, since A is further away, Or should B be bigger that A , or is there no way of telling, just by looking at the question

Last edited: Dec 11, 2003
2. Dec 12, 2003

### Adrian Baker

In reply to the first part of your question, electric field is a vector quantity. You need to think what is the direction the field due to each charge. Try drawing it.

As one is +ve and the other -ve, both would move a positive charge in the same direction, so you add the values.

You say "Find the electric fields a pont A & B.". Actually you should find the value of the electric fields AT C due to A and at C due to B.

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