# What is the right hand rule in electromagnetism?

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The right hand rule states that, to find the direction of the magnetic force on a positive moving charge, the thumb of the right hand point in the direction of v, the fingers in the direction of B, and the force (F) is directed perpendicular to the right hand palm.

## What is meant by right hand rule?

: a rule in electricity: if the thumb, the forefinger, and the middle finger of the right hand are bent at right angles to one another with the thumb pointed in the direction of motion of a conductor relative to a magnetic field and the forefinger in the direction of the field, then the middle finger will point in the …

## What is the right hand rule for torque?

The direction of the torque is given by the right-hand rule. Using your right hand, point your fingers in the direction of the first vector (r) and curl them into the direction of the second vector (F). Your thumb, sticking out, will point in the direction of the torque.

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## What are the 3 right hand rules?

Some would claim that there is only one right-hand rule, but I have found the convention of three separate rules for the most common situations to be very convenient. These are for (1) long, straight wires, (2) free moving charges in magnetic fields, and (3) the solenoid rule – which are loops of current.

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## How do you use the right hand rule?

We can remember this diagram using the right-hand rule. If you point your pointer finger in the direction the positive charge is moving, and then your middle finger in the direction of the magnetic field, your thumb points in the direction of the magnetic force pushing on the moving charge.

## Can you have negative torque?

Negative torque does not exist, just like negative force and negative energy don’t exist. (Don’t get me started on quantum mechanics) It’s an absolute value, meaning it can only be positive. The direction, however, can vary. Negative torque does not exist, just like negative force and negative energy don’t exist.

## How do you know if torque is positive or negative?

Torque is a vector quantity that has direction as well as magnitude. Turning the handle of a screwdriver clockwise and then counterclockwise will advance the screw first inward and then outward. By convention, counterclockwise torques are positive and clockwise torques are negative.

## Is right hand positive or negative?

The right hand rule is a way to predict the direction of a force in a magnetic field. To predict the behavior of positive charges, use your right hand. To predict the behavior of negative charges, use your left hand.

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## What is the difference between left hand rule and right hand rule?

Fleming’s left-hand rule is used for electric motors, while Fleming’s right-hand rule is used for electric generators. … Since neither the direction of motion nor the direction of the magnetic field (inside the motor/generator) has changed, the direction of the electric current in the motor/generator has reversed.

## Who proposed right hand rule?

In mathematics and physics, the right-hand rule is a common mnemonic for understanding notation conventions for vectors in 3 dimensions. It was invented for use in electromagnetism by British physicist John Ambrose Fleming in the late 19th century.

## What is the first right hand rule?

The right hand rule states that, to find the direction of the magnetic force on a positive moving charge, the thumb of the right hand point in the direction of v, the fingers in the direction of B, and the force (F) is directed perpendicular to the right hand palm.

## Why the right hand rule works?

It works because we use the same right hand rule to determine the force the magnetic field exerts on a current. … And it is always the case that these sort of right/left hand rules occur in pairs that make the observable result not arbitrary.

## What is right hand rule 10th thumb?

If a current carrying conductor is imagined to be held in right hand such that thumb points in direction of current,then curled fingers of hand indicate the direction of magnetic field. If current flows in upward direction then direction will be anticlockwise.

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