- #1
nunos
- 7
- 0
Have exam tomorrow. I know I should have studied before and more, but please help. If you know the answer, please take some time to reply. Thanks very much.
There are two charges, q1 = +4.5nC, and q2, ?, which are at distances d1 = 2.5cm and d2 = 2.0cm, from a point which has the tension of 3.2kV. What is the value of q2?
E = \frac{kQ}{r^2}, I think that's all, but I most probably am wrong.
This is certainly wrong. I have not even used one of the data given. Anyone, that's the best I was able to come up with.
\frac{kq_1}{r_1^2} = \frac{kq_2}{r_2^2}
which gives q_2 = 1.28 * 10^{-6} which is a wrong answer, since the correct one is supposed to be 3.5nC.
Homework Statement
There are two charges, q1 = +4.5nC, and q2, ?, which are at distances d1 = 2.5cm and d2 = 2.0cm, from a point which has the tension of 3.2kV. What is the value of q2?
Homework Equations
E = \frac{kQ}{r^2}, I think that's all, but I most probably am wrong.
The Attempt at a Solution
This is certainly wrong. I have not even used one of the data given. Anyone, that's the best I was able to come up with.
\frac{kq_1}{r_1^2} = \frac{kq_2}{r_2^2}
which gives q_2 = 1.28 * 10^{-6} which is a wrong answer, since the correct one is supposed to be 3.5nC.
