Question

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

Answer 1

Factors on which the magnetic field produced by a current carrying conductor depends :
(i) Current passing through the conductor. 
(ii) Distance of the magnetic compass from the conductor. 
Right Hand Thumb Rule gives the direction of magnetic field.