(D) circles around the wire that go in at the bottom
Explanation:
The direction of magnetic field can be determined by using right hand rule. This rule states that if the thumb shows the electric current, then the curled finger will give the direction of magnetic field.
In this case, a wire has a current that flows to the right. According to right hand rule, the direction of magnetic field will be given by curled finger i.e. circles around the wire that go in at the bottom.
Hence, the correct option is (D) circles around the wire that go in at the bottom.
