# Question about right hand rule (magnetism)

• gokuls
In summary, the right hand rule can be used to determine the direction of the magnetic field, force, and current even when they are not orthogonal to each other. The formula for the magnetic force on a charged particle takes into account the angle between the velocity vector and the magnetic field, which does not have to be 90 degrees. This can be seen in the example of a wire with current where the force applied can be at any angle, but only the portion that is orthogonal to the current will produce a magnetic field.
gokuls
Is the right hand rule for determining the direction of the magnetic field, force, and current only used when the aforementioned vectors are orthogonal to each other? Or, can the RHR be used in other cases as well?

When aren't they orthogonal?

They're not always orthogonal I think. The formula for the magnetic force on a charged particle:
F = qvB sin(theta). The sin is the angle between the velocity vector of the charged particle and the magnetic field, and it doesn't have to be 90.

Example: A wire with current going through it has a force applied to it which makes it move. The force could be at any angle but only the portion of the force which is orthogonal to the current will make a magnetic field (which is orthogonal to both the current and the portion of force which is orthogonal to the current.

I hope that makes sense.

The right hand rule is a commonly used method for determining the direction of the magnetic field, force, and current in a given situation. It is typically used when the aforementioned vectors are orthogonal, or at right angles, to each other. However, it can also be applied in other cases, such as when the vectors are not exactly orthogonal but are close enough to be considered as such. Additionally, the right hand rule can also be used to determine the direction of the magnetic field, force, and current in more complex situations, such as in electromagnetic induction or in curved wires. It is a versatile tool that can be applied in various scenarios to accurately determine the direction of these vectors.

## 1. What is the right hand rule in magnetism?

The right hand rule in magnetism is a method for determining the direction of a magnetic field or current based on the position of your right hand. It states that if you point your thumb in the direction of the current or magnetic field, then your fingers will curl in the direction of the magnetic field lines.

## 2. How is the right hand rule used in electromagnetism?

In electromagnetism, the right hand rule is used to determine the direction of the magnetic field created by a current-carrying wire. It is also used to determine the direction of the force on a current-carrying wire in a magnetic field.

## 3. What is the difference between the right hand rule and the left hand rule in magnetism?

The right hand rule is used for determining the direction of the magnetic field or current in a conventional current (positive charge) while the left hand rule is used for determining the direction of the magnetic field or current in an electron current (negative charge).

## 4. Can the right hand rule be used for any magnetic field or current?

Yes, the right hand rule can be applied to any magnetic field or current, as long as the direction of the current is known.

## 5. Is the right hand rule a universal rule in physics?

No, the right hand rule is specific to magnetism and electromagnetism. It is not a universal rule in physics and may not be applicable in other areas of physics.

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