"two long parallel wires 24.0 cm apart carry currents of 3.0 a and 8.0 a in the same direction. how far from the wire carrying 3.0 a is the magnetic field is zero (in cm)? "

6.5454 m

Explanation:

Let the distance from the wire carrying 3 A current is x

Then the distance from the the carrying current 8 A is 24-x

We know that magnetic field due to long wire is given by

It is given that magnetic field is zero at some distance so

Here

So

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate