Question

State Fleming’s left-hand rule.

Answer 1

Hint: In this question, we will first find the basic concept of Fleming's left-hand rule. Since, the right hand rule tells us about the direction of magnetic force acting on a conductor, its application will be based on the basic rule. This will give us the required answer.

Complete step-by-step answer:

We know that 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. Fleming’s left-hand rule: from this rule if we Stretch our thumb, forefinger and middle finger of the left hand such that all these fingers are mutually perpendicular to each other. So, if the forefinger points in the direction of the magnetic field and the middle finger indicates the direction of the current, then the thumb will indicate the direction of motion or the force on the conductor.

The application of Fleming's right-hand rule in the electric device is:
Fleming's right-hand rule is used to find the direction of induced current in an electric generator. As we know that in an electric generator, the motion and magnetic field exist and these lead to the production of an electric current in the generator. So, the right hand rule is used here to find the direction of induced current in an electric generator.
Also, we can learn about the applications of Fleming's left-hand rule, which is used to find the direction of magnetic force acting in electric motors. We know that an electric current and magnetic field exist in an electric motor, and these lead to the force that creates the motion. So, the left hand rule is used here which gives the direction of magnetic force acting in the electric motor.

Additional Information: 

Fleming’s right-hand rule can be understood as: from this rule, if we Stretch the thumb, forefinger and middle finger of our right hand such that they are mutually perpendicular to each other. Here, if the forefinger point indicates the direction of the magnetic field and the thumb indicates the direction of motion of the conductor, then the middle finger will indicate the direction of induced current in the conductor.

The application of Fleming's right-hand rule in the electric device is: Fleming's right-hand rule is used to find the direction of induced current in an electric generator. As we know that in an electric generator, the motion and magnetic field exist and these lead to the production of an electric current in the generator. So, the right hand rule is used here to find the direction of induced current in an electric generator. Also, we can learn about the applications of Fleming's left-hand rule, which is used to find the direction of magnetic force acting in electric motors. We know that an electric current and magnetic field exist in an electric motor, and these lead to the force that creates the motion. So, the left hand rule is used here which gives the direction of magnetic force acting in the electric motor.

Note: Remember the rules because both the rules tell the different fields. Further, we need to notice the direction of the magnetic field i.e., whether the field is inward or outward. All the three fingers should be placed perpendicular to each other.