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Hi everyone.
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We have a question in which we have given that we have two similar equally charged identical metallic spire a and b, and they are repelling each other with a given electrostatic force of repulsion.
00:12
So we have given that the force of repulsion between two metallic spear.
00:17
So force of repulsion and it is a electrostatic force of repulsion.
00:21
So what we can say that this is given in the question.
00:24
Let's say f and which is given that it is equal to 2 into 10 to the power minus 5 newton.
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10 to the power minus 5 newton.
00:33
Let's also we have given now a third basically a third identical spare which is now touching a then it is placed at the middle of the a and b so we need to find the net electrostatic force on c so we are bringing bringing another spare c another spare c so we need to find the net electrostatic force find net electrostatic force electrostatic force on c let's see how can we do this question so first of all as we have given in the question we have given the force of repulsion between a and b so let we can say that let charge on charge on spare a and b b q1 and q2 and separation, let's say, r.
01:50
Separation is, let's say, r.
01:52
So we can say that from the question we have given that the force between them is equals to k, q square by r square, and the value of it is given that 2 into 10 to the power minus 5 newton in the equation.
02:08
Now, also, now what we are doing, we are just touching the another spare c.
02:13
So now we are doing that when spare c is touched to a is touched to a.
02:27
So when this since the spare c is identical to a, so there will be a charge distribution and there will be a equally charge distributed in a and b.
02:36
So we can say that charge on a and b will be equal and it should be half of the initial charge.
02:49
That is we can say that it is q by 2.
02:51
Since the charge is same on both of them, so we can say that it is not q and q2, it is just q and q2...