How can one determine the direction of the magnetic field for a current carrying wire?

Answer 1

Curl your right-hand fist around the wire, with your thumb pointing in the direction of the

current in the wire. Your four curled fingers point in the direction of the magnetic field

that surrounds the wire.

Answer 2

yes.

when a coil or wire is hooked up to a power source the wire creates a magnetic field.

since a battery's current travels from - to + and a magnet travels from north or - to south or +

therefore the magnetic current SHOULD travle from the part of the wire connected to the negative to the part connected to the positive

Further AnswerViewed from either end of a straight conductor, the magnetic field due to the current in that conductor is generally represented as a series of concentric rings of magnetic flux lines surrounding the conductor. Bear in mind that this is only a 'model' (representation) of the field; there isn't really any 'lines' of force (it's simpy the area surrounding the conductor in which the effects of the magnetic field may be observed)!

Arrows are drawn on these concentric rings to represent the direction in which the flux lines act (which is the direction in which a compass needle will point if placed in that field).

For conventional current flow (+ to -), the direction can be determined by the right-hand grip rule: grip the conductor with your thumb pointing in the conventional current direction, and the curl of the fingers will represent the direction of the field. Alternatively, use the 'corkscrew rule' -the direction of the field is the direction you would turn a corkscrew when it points in the same direction as the conventional current.

For electron flow (- to +), use the left-hand grip ruleinstead of the right hand.

In practice, to determine the direction in which the magnetic field is acting, place the current-carrying conductor vertically, and place a compass next to the conductor -the resulting direction of the compass needle will indicate the direction of the field (clockwise or counterclockwise).

A coil of wire behaves just like a bar magnet, with one end a north pole and the other end a south pole. To determine its polarity, place a compass near either end. The needle will point to the south pole of that electromagnet.

Answer 3

Curl your right-hand fist around the wire, with your thumb pointing in the direction of the

current in the wire. Your four curled fingers point in the direction of the magnetic field

that surrounds the wire.

Answer 4

I mean to say how we can say that it will always be according to right hand rule?

Answer 5

There in only one direction