00:01
In this question we talk about two long parallel wires.
00:05
So, we are given here two long parallel wires that we are given here.
00:10
They are separated by r which is equal to 2 .65 cm or we can say 0 .0265 m.
00:19
Carrier current is in the opposite direction.
00:23
Now, current that is in one wire that is i1 we are given here which is 1 .70 a.
00:30
And the current in the other wire we can write i2 here is 3 a.
00:35
Now, in the first part of this question our target is to find magnitude of force.
00:39
So, let's find out the magnitude of force per unit length and that exerted one wire on another wire.
00:47
So, let's find out magnitude of force f.
00:50
So, here we can write f which is equal to here mu0 multiplied by i1 multiplied by i2 divided we can write 2 pi r which is equal to 4 pi multiplied we can write 10 raised to minus 7 multiplied we can write current that is 1 .70 multiplied we can write 3 a divided we can write 2 pi multiplied we can write r.
01:15
R is 0 .0265.
01:19
And now the value of force f which is equal to answer is or the answer is 384 .90 multiplied we can write 10 raised to minus 7 n...