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*Note: When we talk about the left hand and right hand rules, we have some confusion built into the ideas. The confusion comes from the "old school" model that said electric current flowed from positive to negative. This is the so-called conventional current picture of electricity. Conventional current flows from positive to negative. It is electron current that flows from negative to positive. And that's what actually happens, and how we see things today. But both ideas as regards current flow are still kicked around. If we use Fleming's rule to work things out, then the current direction indications will have to be "reversed" to understand the mnemonic. Be sure to have an accurate picture of which rule and which method of current flow is being used to explain a given electrical situation!

For a wire, the left hand rule states that if the wire is grasped by wrapping the hand around it with the thumb pointing in the direction of electron flow, the fingers will be In a generator, if we apply the left hand rule (using electron flow instead of conventional current), we can find the direction of (electron) current flow that is induced in the conductor if we know the direction of the movement of the conductor and the direction of the magnetic field. Extend the left hand, and stick out the thumb. Then stick out the index finger in a direction that is an extension of the arm. The tumb will be "up" and the index finger will be "out" at 90 degrees from the thumb. Now stick out the middle finger to form a 90 degree angle with both the thumb and the index finger. Now you have a digit pointing in each of three directions that are mutually 90 degrees apart, each one from the others. Let's apply this mnemonic.

By pointing the thumb in the direction of the movement of the wire, and the index finger in the direction of the magnetic field, the middle finger will be pointing in the direction electrons will be moving as a result of the induced voltage in the conductor. It's just that simple and easy. Remember that both these mnemonics are "opposite" of Fleming's left hand rule, because we chose to speak to electron flow rather than use the idea of conventional current.

Left hand is for motor and right hand for generator.

Fore finger in both the direction of Field. Note "F"

Centre finger is for the current, of course, conventional current. Note down "C"

The Main finger is for the Movement of the conductor. Note "M"

Main is thumb. Middle finger, of course, is taken to be the centre.

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โˆ™ 2013-09-22 10:14:18
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Q: What is the left hand rule?
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Related questions

Who first suggested Fleming's left hand rule?

Who first suggested Fleming's left hand rule?


What John Ambrose Fleming left hand rule employed in?

in which thing fleming's left hand rule employed?


John Ambrose Fleming left hand rule employed in?

in which thing fleming's left hand rule employed?


When was the left hand rule invented?

it wasnt invented ;)


What is the Difference between left hand rule and right hand rule?

Fleming's right hand rule shows the direction of induced current flow when a conductor moves in a magnetic field. Fleming's left hand rule shows the direction of the thrust on a conductor carrying a current in a magnetic field.


What hand do you put any ring for men?

Usually the left hand, though there is not a rule as to which hand or finger.


What is the left hand rule for conductors?

The left hand rule for conductors says that your fingers will point in the direction of the resulting magnetic field. The magnetic field is produced by the electron flow.


What is the idea behind him about Fleming's left hand rule and right hand hand rule?

hmm,firstly for the fleming's left hand rule it is mostly to find the force if given the direction of the magnetic field and direction of current!whereas according to fleming's right hand rule it is used to find the current induced in the circuit where field lines are cut!!


How do you determine the direction of the magnetic field?

by flemings left hand rule.


Is there a rule about always eating with a spoon in your left hand?

If there is, it is not an etiquette rule, and is not a rule of manners. It would be a custom, or a cultural rule. Maybe even a family rule. Etiquette says that a person eats with whichever hand they please.


Which fingers are used in maxwell's left hand rule?

The thumb, the index finger and the middle finger.


What can you hold in your right hand but not in your left hand?

Eating With Chopsticks And Writing With Pen/Pencil For Only Some People Only xD Because Some People Can Eat With Chopsticks On The Left Hand And Write With A Pen/Pencil With The Left Hand Too '-'

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