Question

The direction of magnetic field around a current carrying conductor is determined by which of the following principles?
This question has multiple options
(A) Fleming’s right hand rule
(B) Ampere’s right hand rule
(C) Maxwell’s cork screw rule
(D) Ampere’s swimming rule

Answer 1

Hint: To answer this question we have to first know the various rules that will be required to explain the direction of the magnetic field. So to begin the answer to this question, we have to define the rules. On the basis of the explanation of each of the rules we have to choose the answer.

Complete step by step answer:
We should know that the direction of the magnetic field that is produced at a specific point by a current-carrying conductor is explained by one of the following rules that are mentioned below:
Ampere’s swimming rule- We know that this rule states that if a man swims along a current carrying conductor which is in the direction of the current, then the north pole of the magnetic needle which is kept underneath the wire, will always be deflected towards the left hand of the man.
Fleming’s Right hand rule- This rule states that if we hold a current carrying conductor in the right hand with the thumb pointing towards the direction of the current, then the direction of the field lines will always be in the direction of the fingers.
Maxwell’s Cork Screw Rule- This rule states that if a right handed corkscrew with its axis being coincident with the current carrying wire, then the screw if rotated to advance in the direction of current, the direction in which there will be the rotation of the thumb will give the direction of the magnetic field lines.
So from the above explanation it is clear that the direction of magnetic field around a current carrying conductor is determined by Fleming’s right hand rule, Maxwell’s cork screw rule and Ampere’s swimming rule.

Hence option A, C and D are correct.

Note: The magnetic field is defined as any vector field which will describe the magnetic influence on an electric charge of any other moving charges or we can also say for any magnetized materials.
We should always remember that a charge that will be moving in a magnetic field will be experiencing a force which is perpendicular to the individual velocity and also to the magnetic field.