Question

oa is the direction of electric current. what's correct magnetic field ring (a) (b) (c)​

Answer 1

(b) is correct magnetic field ring.

Here OA is Direction of electric current then according to right hand thumb rule.

option (b) is correct magnetic field ring.

• Right hand thum rule states that

Imagine that you have held the conductor in your right hand in such a way that your thumb points in the direction of the current. Then turn your fingers around the conductor, the direction of the fingers is the direction of the magnetic lines of force.

More information:-

Fleming's left hand rule:-

According to this rule, the left hand thumb, index finger, and the middle finger are stretched so as to be perpendicular to each other. If the index finger is in the direction of the magnetic field, and the middle finger points in the direction of the current, then the direction of the thumb is the direction of the force on the conductor.

Fleming's right hand rule:-

Stretch the thumb, the index finger and the middle finger in such a way that they will be perpendicular to each other. In this position, the thumb indicates the direction of motion of the conductor, the index finger the direction of the magnetic field, and the middle finger shows the direction of the induced current.