Question

what is right tumb rule why we use it​

Answer 1

Answer:

RIGHT HAND THUMB RULE

IT states that if you hold the current carrying straight wire in the grip of your right hand in such a way that the stretched thumb points in the direction of current then the direction of the curl of the fingers will give the direction of the magnetic field. This rule is also called Maxwell's corkscrew rule.

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Answer 2

Answer:

if we stretch our right hand finger in such a way that our thumb finger and middle finger are mutually perpendicular to each other our points in the direction of motion our finger is in the direction of magnetic field then our middle finger point out the direction of induced current