List the factors on which the magnetic field produced by a current carrying straight conductor depends ? State the rule which gives the direction of its magnetic field. Draw the pattern of magnetic field lines due to a straight current carrying conductor.

The factors on which the magnetic field produced by a current carrying straight conductor depends are

(a) directly proportional to magnitude of current, and

(b) inversely proportional to the distance from conductor

..

The direction of magnetic field is given by the Right Hand Thumb Rule.

..

The direction of filed lines is given as