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Q.

State whether the given statement is true or false.


Fleming’s Left Hand Rule states that if we arrange our thumb, forefinger and middle finger of the left hand perpendicular to each other, then the thumb points towards the direction of the magnetic force, the forefinger points towards the direction of the magnetic field and the middle finger points towards the direction of the current.


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a

True

b

False 

answer is A.

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Detailed Solution

The given statement is true.
Concept- We shall first discover the fundamental idea behind Fleming's left-hand rule in this question. The right hand rule's application will be predicated on the fundamental rule since it informs us of the direction of the magnetic force operating on a conductor. This will provide us with the needed response.
We are aware that Fleming's right-hand rule provides the direction of induced current while Fleming's left-hand rule provides the direction of magnetic force acting on a conductor. Fleming's left-hand rule: If we stretch our thumb, forefinger, and middle finger in such a way that they are all perpendicular to one another, we may apply this rule. Therefore, the thumb will indicate the
direction of motion or the force acting on the conductor if the forefinger points in the direction of the magnetic field and the middle finger points in the direction of the current.
Question ImageFleming's right-hand rule is applied to electric devices in the following way: It may be used to determine the direction of induced current in an electric generator. As is well known, an electric generator has a magnetic field and velocity, which together cause the generator to produce an electric current. In order to determine the direction of induced current in an electric generator, the right hand rule is applied here.
Additionally, we may discover the uses of Fleming's left-hand rule, which is employed to determine the magnetic force's direction in electric motors. We are aware that an electric motor has a magnetic field and an electric current, and that these two components combine to provide the force that propels motion. In order to determine the direction of the magnetic force operating in the electric motor, the left hand rule is applied here.
Hence, the given statement is true.
 
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