Fleming's Right Hand Rule

Last updated at April 16, 2024 by

 

In Electromagnetic Induction, we saw that we can induce electric current by

  • Moving wire in a fixed Magnetic Field
  • Changing magnetic field keeping Wire fixed

 

But, how to find Direction of Induced Current?

We find Direction of Induced Current Using Fleming's Right Hand Rule

 

On our Right Hand,

We put our Thumb, Index finger and Middle Finger perpendicular to each other as shown below

 

flemings-right-hand-rule---teachoo.png

Then,

  • Our Thumb represents Direction of Motion of Conductor
  • Index Finger represents Direction of Magnetic Field
  • Middle Finger shows direction of Induced current

 

To remember this, remember FBI

  • F - Force or Motion
  • B - Magnetic Field
  • I - Induced Current

how-to-remember-flemings-right-hand-rule---fbi.png

Note : FBI is used to remember both Left and Right Rule.

But, always remember... For Induced Current , we use Right Hand Rule

 

Let's do some questions

 

Questions

What is the direction of induced current in the below figure?

1.png

Answer

2.png

Find Direction of Induced Current in the figure below 

3.png

4.png

Given Direction of Magnetic Field and Motion. Use Fleming's Right Hand Rule to Find Direction of Induced Current
5.png

Answer

6.png

 

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo