# What is true of the magnetic forces between parallel and anti parallel currents?

Both parallel and anti-parallel currents do not exert magnetic forces between each other since the angle between them is either O or 180 degrees so the cross product is zero. Both parallel and anti-parallel currents repel each other Both parallel and anti-parallel currents attract each other.

This force between two current carrying wires gives rise to the fundamental definition of the Ampère: If two long parallel wires 1 m apart each carry a current of 1 A, then the force per unit length on each wire is 2 x 10 7 N/m.

Subsequently, question is, how does parallel and antiparallel current behave? Application of right hand rules shows that when the currents are parallel the force between the wires is attractive and when the currents are opposite (anti-parallel) the force is repulsive. In the diagram below, magnetic field lines are blue and the currents are into or out of the plane.

Secondly, what happens if the current is parallel to the magnetic field?

Parallel wires carrying currents will exert forces on each other. One wire sets up a magnetic field that influences the other wire, and vice versa. When the current goes the same way in the two wires, the force is attractive. When the currents go opposite ways, the force is repulsive.

What is the force on a current carrying wire that is parallel to a magnetic field?

Force on a currentcarrying wire that is parallel to magnetic field will be zero. This is because the magnitude of force depends on the sin of the angle between the direction of current and the direction of magnetic field, so if the current carrying wire is held parallel to the magnetic field, the force will be zero.

### Why do two parallel current carrying wires attract each other?

When the currents flow in the same direction the magnetic field will be opposite and the wires will attract. If the currents flow in opposite directions, the electrons will “see” a higher density of electrons in the other wire due to relativistic length contraction. And the wires will repel.

### Why two parallel wires carrying current in opposite directions repel each other?

The direction of magnetic field on the conductor is determined by Fleming’s right hand rule. Thus, gives us that the direction of magnetic field turns out to be opposite to each other. This results in repulsion of the conductors carrying current in opposite directions relatively and vice versa.

### What is force per unit length?

The ratio F/l is the force per unit length between two parallel currents I1 and I2 separated by a distance r. The force is attractive if the currents are in the same direction and repulsive if they are in opposite directions. This force is responsible for the pinch effect in electric arcs and other plasmas.

### Is Biot Savart legal?

The Biot-Savart Law is an equation that describes the magnetic field created by a current-carrying wire, and allows you to calculate its strength at various points. And we also replace the electric field E with a magnetic field element dB because a moving charge produces a magnetic field, not an electric field.

### What is the nature of force between two parallel current carrying wires in same direction?

By applying Flemming’s Left Hand Rule, we will find that the magnetic force between 2 conductors carrying parallel current isattractive in nature. The nature of force between two parallel current carrying wires having current in same direction is attraction.

### Would two perpendicular current carrying wires exert a force on each other?

Any current-carrying wire creates a magnetic field around itself and this magnetic field can exert a force on another wire with another current. The force due to the magnetic field is perpendicular to both magnetic field and the current direction and is proportional to both current and magnetic field.

### Why is the magnetic force perpendicular to the magnetic field?

The magnetic force is perpendicular to the velocity, and so velocity changes in direction but not magnitude. Uniform circular motion results. The component of the velocity parallel to the field is unaffected, since the magnetic force is zero for motion parallel to the field.

### How magnetic force is produced?

A magnetic field can be created by running electricity through a wire. All magnetic fields are created by moving charged particles. Even the magnet on your fridge is magnetic because it contains electrons that are constantly moving around inside.

### What is the formula for magnetic force?

Magnetic Force The force is perpendicular to both the velocity v of the charge q and the magnetic field B. 2. The magnitude of the force is F = qvB sinθ where θ is the angle < 180 degrees between the velocity and the magnetic field.

### What is the SI unit of magnetic force?

Magnetic Field. The SI unit for magnetic field is the Tesla, which can be seen from the magnetic part of the Lorentz force law Fmagnetic = qvB to be composed of (Newton x second)/(Coulomb x meter).

### Which way does magnetic field flow?

Lines of Force from a Bar Magnets Magnetic Field The general direction for the magnetic flux flow is from the North ( N ) to the South ( S ) pole. In addition, these magnetic lines form closed loops that leave at the north pole of the magnet and enter at the south pole. Magnetic poles are always in pairs.

### What is meant by magnetic force?

Magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion. The magnetic force between two moving charges may be described as the effect exerted upon either charge by a magnetic field created by the other.