Who and how  gave  the rules to find the direction of magnetic field .

How did he verify them  .Are they completely accurate.

And why their direction is important . How does their direction influence them.

Hi,

We appreciate your post! however, we only cater to one question per post, so we request you to post these multiple questions as a separate query post.

 

The following is the response to your first query:

Who gave  the rules to find the direction of magnetic field ?

- It was Sir John Ambrose Fleming, a British electrical engineer and physicist who discovered the relationship between the dircetion of magnetic field, electric flow and the force experienced. And compiled a rule based on this relationship.

- This is the reason why it is named 'Fleming's Rule'