Posted by **Andrew** on Thursday, February 3, 2011 at 4:59am.

1) Charges of +4uC and -6uC are placed at two corners of an equilateral triangle with sides of 0.10m. At the third corner, what is the electric field magnitude created by these two charges?

A]4.5 x 10e6 N/C

B]3.1 x 10e6 N/C

C]1.6 x 10e6

D]4.8 x 10e6

2)A +2.0 nC pont ahrge isplaced at one corner of a square (1.5m on each side), and a -3.0 nC charge is placed on a corner diagonally away from the first charge. What is the magnitude of the electric fled at either the two unoccupied corners?

A]20 N/C

B]14 N/C

C]4 N/C

D]12 N/C

E]8 N/C

- Physics -
**drwls**, Thursday, February 3, 2011 at 6:07am
Both problems involve the adding of two vectors. Get the magnitude of each vector using Coulomb's law.

You should make an effort to do these yourself.

In problem 2), you end up adding two perpendicular E-field vectors with magnitudes

k*2*10^-9/(1.5)^2 and

k*3*10^-9/(1.5)^2

The magnitude is, from the Pythagorean Theorem,

(k/2.25)*10^-9 sqrt13

Using 9.0*10^9 for k, I get 14.4 N/C

- Physics -
**Anonymous**, Friday, October 3, 2014 at 5:00am
4.8 x 10^6 N/C

## Answer this Question

## Related Questions

- physics - Two point charges are placed at two of the corners of a triangle (Take...
- physics2 - Charges are placed on an equilateral triangle (all angles are equal ...
- Physics - Three point charges have equal magnitudes, two being positive and one...
- Physics - Three point charges have equal magnitudes, two being positive and one...
- physics - The physics of electric potential energy at one corner of a triangle. ...
- physics - Four charges are placed at the four corners of a square of side 15 cm....
- physics - HELP HELP HELP Two tiny objects with equal charges of 83.0 µC are ...
- physics - HELP HELP HELP Two tiny objects with equal charges of 83.0 µC are ...
- physics - Two tiny objects with equal charges of 59.0 µC are placed at two ...
- Physics - 1. The problem statement, all variables and given/known data A point ...