Flemings Left Hand Rule and Right Hand Rule

Edited By Team Careers360 | Updated on Nov 29, 2022 01:13 PM IST

The Left-Hand Rule of Fleming

According to Fleming's left-hand rule:
A current-carrying conductor is subjected to a force that is perpendicular to both the field and the current flow direction when exposed to an external magnetic field. Fleming left hand rule is used to find direction of force exerted on a conductor placed in an electric motor when the magnetic field direction and the current direction are known.

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The Left-Hand Rule of Fleming
Fleming right hand rule:
Applications of fleming's right hand rule

Flemings Left Hand Rule and Right Hand Rule

John Ambrose Fleming was the one who came up with the idea of right hand thumb rule and left hand thumb rule.

According to Fleming's left hand thumb rule, if we stretch the thumb, middle finger, and index finger of the left hand to form a 90-degree angle (perpendicular to each other), the conductor. When something is placed in a magnetic field, it is subjected to a magnetic force.

as follows:

Flemings left hand rule

Thumb: It points in the force's direction (F)
The direction of the current is represented by the middle finger (I)
The direction of the magnetic field is represented by the index finger (B)

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Using the left hand to illustrate

On the thumb, forefinger, and middle finger, a left hand can be used to denote three mutually orthogonal axes. When the thumb, center finger, and forefinger of the left hand are arranged at right angles to one another, the thumb points in the direction of magnetic force, the center finger points in the direction of current, and the forefinger points in the direction of a magnetic field.

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Fleming left hand rule

Flemings left hand rule

When a moving conductor is placed inside a magnetic field, a current is induced in it, according to Faraday's law of electromagnetic induction.

There will be a link between the direction of applied force, magnetic field, and current if the conductor is forcefully moved inside the magnetic field.
It is mostly utilized in the operation of electric motors.
The rule's principal goal is to determine the direction of motion in an electric motor.
The direction of motion in an electric motor is determined by the popular Fleming's left-hand rule, which is based on Faraday's law of electromagnetic induction.

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Application of flemings left hand rule

1. We can identify the direction of force exerted on the proton using Fleming's left-hand rule.

Because the proton is going towards the east, the current is also moving towards the east. The force is directed towards the north since the magnetic field is acting downwards. As a result, we can say the force is acting northward.

2. We may identify the direction of the magnetic field acting on the electron using Fleming's left-hand rule. An electron has a negative charge, as we all know. The current runs in the opposite direction, down, when an electron moves upward. The force operating on the electron is thought to be in the direction of the south. As a result, the magnetic field is oriented towards the east.

Fleming right hand rule:

We will be able to stretch the thumb, middle finger, and index finger in such a way that they are perpendicular to one another as follows:

Fleming right hand rule

1. Thumb: It moves in the same direction as the conductor.

2. The induced current is pointed in the direction of the middle finger.

3. Index Finger: It points in the magnetic field's direction.

Applications of fleming's right hand rule

The direction of induced current within an electric generator is determined by Fleming's right hand rule.

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Frequently Asked Questions (FAQs)

1. What is difference between Fleming left hand rule and right hand rule?

Fleming's left-hand rule gives the direction of magnetic force acting on a conductor whereas, Fleming's right-hand rule gives us the direction of induced current.

2. What does Fleming's left hand rule explain?

Fleming's left- hand rule explains that, if we stretch the thumb, middle finger and the index finger of the left hand in such a way that they make an angle of 90 degrees (Perpendicular to each other) and the conductor placed in the magnetic field experiences Magnetic force.

3. What is Fleming's right hand rule called?

Fleming's right hand is also known as dynamo rule. It gives the direction of induced current produced in a straight conductor moving in a magnetic filed.

4. When it comes to coils, what is the left-hand rule?

The left-hand rule of Fleming aids with movement prediction. A current-carrying coil of wire twists when it is put in a magnetic field. The motor effect is what this is known as.

5. What is the other name for the thumb rule on the right hand?

With the use of the Right Hand Thumb Rule, the direction of magnetic field lines produced by current flow can be hypothetically calculated. Clasp Rule is another term for right hand thumb rule.

6. What circumstances influence Fleming's rule of the left hand?

The force is greatest when the current direction is 90 degrees from the magnetic field direction for any given combination of current and magnetic field strength. If the current and magnetic field are parallel to one another, there is no motor effect force.