A straight wire carries a current of 8.00 A toward the top of the page.
What are the magnitude and direction of the magnetic field at point P, which is 8.00 cm to the right of the wire?

The magnetic field is .

Explanation:

Given that,

Current carried in the wire, I = 8 A toward the top of the page.

We need to find the magnetic field at point P, which is 8.00 cm to the right of the wire. The magnetic field is given by :

So, the magnetic field is . Hence, this is the required solution.

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.