## How do a magnetic field and current affect a wire?

Current flows from the negative end of a battery, through the wire, to the positive end of the battery. Because the magnetic field created by the electric current in the wire is changing directions around the wire, it will repel both poles of the magnet by bending away from the wire.

## How is magnetic field related to current?

The interactions between electric currents and magnetic fields create forces. The magnetic force on a current in a magnetic field = current x displacement across the magnetic field. When two currents are directed through magnetic fields in the same direction, they attract.

How do you find the magnetic field due to straight wire carrying current?

Magnetic field due to an infinitely long straight current carrying wire – definition. B=(2πr)μ0I where B is the magnitude of magnetic field, r is the distance from the wire where the magnetic field is calculated, and I is the applied current.

### Why do wires have magnetic fields?

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.

### Do magnets affect wires?

A constant magnetic field won’t affect current in a wire. A changing magnetic field, such as if you are moving the magnet around, will induce a voltage in the wires, but it will be extremely small. Answer 4: Moving charges, aka current, produce a magnetic field around them.

What is the effect on the current in a wire if?

What is the effect on the current in a wire if both the voltage across it and its resistance are doubled? The current is doubled.

## Does increasing current increase magnetic field?

Yes, increasing current increases magnetic field strength. A moving charge produces a magnetic field around itself. This means a current of moving…

## Will the magnetic field be stronger in a straight wire?

The magnetic field is strongest in the area closest to the wire, and its direction depends upon the direction of the current that produces the field, as illustrated in this interactive animation. Presented in the tutorial is a straight wire with a current flowing through it.

What is the magnetic field of straight wire?

For an infinitely long straight wire, the magnetic field lines are circles centered on the wire. The direction is given by a right-hand rule: With your right hand, point your thumb in the direction of the current. When you curl your fingers they curl in the direction of the magnetic field.

### How do you calculate the force of a coil?

The equation for calculating the force on a wire is Force (N) = magnetic flux density (T) × current (A) × length (m) or, in short F = B I L.

How do a magnetic field and current affect a wire? Current flows from the negative end of a battery, through the wire, to the positive end of the battery. Because the magnetic field created by the electric current in the wire is changing directions around the wire, it will repel both poles of the magnet…