What is the magnetic field around a straight wire?

When a current flows in a wire, it creates a circular magnetic field around the wire. This magnetic field can deflect the needle of a magnetic compass. The strength of the magnetic field is greater closer to the wire, and increases if the current increases.

What is net magnetic field at point O?

The net magnetic field at point $O$ is the sum of magnetic induction at that point due to the two-current carrying straight wires and the magnetic induction at that point due to the semi-circular current carrying wire.

How do you find the magnetic field around a wire?

To observe the direction of the field at any given point around the circumference of the wire, click and drag the compass needle, (its north pole red, its south pole blue). The direction of the magnetic field around the wire is also indicated by the small arrows featured on the individual field lines.

What is r in magnetic field?

current. • The magnitude of a magnetic fields produced by a long. straight wire with a constant current is given by. • Where B is the magnetic field, I is the current, r is the. distance away from the wire, and is called the permeability of free space.

What is r in the magnetic field equation?

Magnitude of Magnetic Field from Current For a long straight wire where I is the current, r is the shortest distance to the wire, and the constant 0=4π10−7 T⋅m/A is the permeability of free space. This is one of the simplest cases to calculate the magnetic field strenght from a current.

What is the magnitude of magnetic field at the Centre O?

6π​μT.

What angle between the wire and magnetic field will produce 0 force?

180°
The force exerted on a current carrying wire placed in a magnetic field is zero when angle between the wire and the direction of magnetic field is. We know that sin 180° is 0. Therefore, the force exerted on a current-carrying wire that is placed in a magnetic field is zero.

What is the magnitude of the current in the wire?

Starts here2:16What is the magnitude of the current in the wire? – YouTubeYouTube