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nunos
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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?
[tex] E = \frac{kQ}{r^2} [/tex], 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.
[tex] \frac{kq_1}{r_1^2} = \frac{kq_2}{r_2^2}[/tex]
which gives [tex]q_2 = 1.28 * 10^{-6} [/tex] which is a wrong answer, since the correct one is supposed to be [tex]3.5nC[/tex].
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
[tex] E = \frac{kQ}{r^2} [/tex], 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.
[tex] \frac{kq_1}{r_1^2} = \frac{kq_2}{r_2^2}[/tex]
which gives [tex]q_2 = 1.28 * 10^{-6} [/tex] which is a wrong answer, since the correct one is supposed to be [tex]3.5nC[/tex].