Question

What is Fleming's left-hand rule Class 10 Ncert?

Answer 1

Fleming's Left-Hand Rule is a simple way to remember the direction of force in an electric motor when a current-carrying conductor is placed in a magnetic field. It is specifically used to determine the direction of motion (force) when current flows through a wire in a magnetic field, which is the basic working principle of an electric motor.

Here’s how to apply Fleming's Left-Hand Rule:

1. Hold your left hand with your thumb, index finger, and middle finger all at right angles (forming an 'L' shape).
   

1. Align the three fingers like this:
   

   - Thumb: Points in the direction of the motion (force) of the conductor (or the direction the wire moves).
   - Index Finger: Points in the direction of the magnetic field (from North to South).
   - Middle Finger: Points in the direction of the current (positive to negative).

If you position your hand correctly, the thumb shows you the direction of the force or motion, which is what you want to know.

Example:

If a current flows through a wire in a magnetic field, using Fleming’s Left-Hand Rule will help you figure out which way the wire will move.

In simple terms:

1. Thumb = Force (motion)
   

1. Index Finger = Magnetic Field
   

1. Middle Finger = Current
   

This rule is essential for understanding how electric motors work, where current in a coil interacts with the magnetic field to create motion.