can we use right hand thumb rule for electric motors? because in my text book inorder to check the direction of magnetic force in electric motor they used right hand rule and never mentioned about left hand rule , they simply asked us to reverse the direction for negative charge?
LEFT HAND RULE ( MOTOR):
Essentially, the Left hand rule is used to figure out the motion resulted from the electromagnetism, in motor circuits (here, we have electric energy changed to kinetic energy)
The Left Hand Rule is used when some information of the circuit is provided (current and magnetic field) and often you are required to find the direction of motion of force.
RIGHT HAND RULE (GENERATOR):
The Right Hand rule is used in generator circuits where kinetic energy is changed to electric.
Often you are given information on the magnetic field and a rotating wire (such as a dynamo or an electric generator) and you are required to find the direction of e.m.f. or the direction of (electric) current.
DISTINGUISHING BETWEEN THEM:
In an electric motor, the electric current and magnet field exist (which are the causes), and they lead to the force that creates the motion (which is the effect), and so the left hand rule is used.
In an electric generator, the motion and magnetic field exist (causes), and they lead to the creation of the electric current (effect), and so the right hand rule is used.
LEFT HAND RULE ( MOTOR):
Essentially, the Left hand rule is used to figure out the motion resulted from the electromagnetism, in motor circuits (here, we have electric energy changed to kinetic energy)
The Left Hand Rule is used when some information of the circuit is provided (current and magnetic field) and often you are required to find the direction of motion of force.
RIGHT HAND RULE (GENERATOR):
The Right Hand rule is used in generator circuits where kinetic energy is changed to electric.
Often you are given information on the magnetic field and a rotating wire (such as a dynamo or an electric generator) and you are required to find the direction of e.m.f. or the direction of (electric) current.
DISTINGUISHING BETWEEN THEM:
In an electric motor, the electric current and magnet field exist (which are the causes), and they lead to the force that creates the motion (which is the effect), and so the left hand rule is used.
In an electric generator, the motion and magnetic field exist (causes), and they lead to the creation of the electric current (effect), and so the right hand rule is used.
