Magnetic field due to current in a long straight line

MAGNETIC FIELD

The space or region around a magnet with in which it can influence other magnet or gnetic material. It is denoted by B.

Magnetic field due to current
Magnetic field due to current in a long straight line


EXPLANATION

Consider a current carrying long, straight wire. A magnetic field B is set up around the current carrying wire. The magnetic lines of force are concentric circular around the wire and their direction depends upon the direction of current. The magnetic field B produces when current I flows through the wire and becomes zero when current stops. The strength of magnetic field is greater near the wire and decreases as the distance from the wire increases.

RIGHT HAND RULE

If the wire is grasped city in the right hand with the direction of current, thumb pointing in the the direction of the magnetic field will be along the curl of fingers.

Right hand rule
Right hand rule


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