Why do we not simply define the direction of the magnetic field?

Because the magnetic force depends on the velocity of the charged particle, so it points in different directions for particles moving in different directions.

What would happen if the magnetic field did not exist?

There is an invisible force protecting us, keeping our atmosphere in place. Without it, life on Earth would be over very quickly. The Earth’s magnetic field protects us by deflecting much of the incoming solar radiation. Without it, our atmosphere would be stripped by solar winds.

How is the direction of the magnetic force field defined?

As shown in Figure 1, the direction of magnetic field lines is defined to be the direction in which the north end of a compass needle points. The magnetic field is traditionally called the B-field. Figure 1. Magnetic field lines are defined to have the direction that a small compass points when placed at a location.

How is the direction of magnetic field at a point in a magnetic field determined using field lines?

The direction of a magnetic field at a point is determined by placing a small compass needle. The N – pole of compass indicates the direction of magnetic field at that point. Magnetic field lines emerge from the north pole and merge at the south pole.

Why don’t we define the direction of the magnetic field to be in the direction of the force on a moving test charge?

What is the direction of magnetic field lines inside any magnet?

Near the South Pole, inside the magnet, the field lines are moving parallel to each other towards the North Pole. So inside the magnets the field lines are always moving towards the North from the south and outside the magnet the field lines are moving from the north to the South.

What would happen to the magnetic field if she connects the battery in the opposite direction?

What would happen to the magnetic field if she connects the battery in the opposite direction? The field would stop.

Why do magnetic field lines go from north to south?

When it comes to magnets, opposites attract. This fact means that the north end of a magnet in a compass is attracted to the south magnetic pole, which lies close to the geographic north pole. Magnetic field lines outside of a permanent magnet always run from the north magnetic pole to the south magnetic pole.

What is the direction of magnetic field outside a bar magnet?

North pole to south pole is the direction of magnetic field lines outside a bar-magnet.

How is the direction of magnetic field at a point determined what is the direction of magnetic field at the Centre of a current carrying circular loop?

Answer: The direction of the magnetic field at a point can be found by placing a small magnetic compass at that point. The direction of magnetic field at the centre of a current-carrying circular loop is perpendicular to the plane of the loop.

What is the direction of the magnetic field that produces the magnetic force on a positive charge?

The direction of the magnetic force can be determined by the right hand rule-1. According to this rule for a positive moving charge, right thumb is in the direction of current, fingers point in the direction of magnetic field and perpendicular to the palm points is the direction of magnetic force.