The direction of the magnetic field produced by a linear current is given by

PQ is a current carrying conductor in the plane of the paper as shown in the figure below. (i) Find the directions of the magnetic fields produced by it at points R and S? (ii) Given r_(1)gt r_(2) , where will the strength of the magnetic field be larger? Give reasons (iii) If the polarity of the battery connected to the wire is reversed, how would the direction of the magnetic field be changed? (iv) Explain the rule that is used to find the direction of the magnetic field for a straight current carrying conductor.

AB is a current-carrying conductor in the plane of the paper as shown in figure. What are the directions of magnetic fields produced by it at point P and Q? Given r_1gtr_2 , where will the strength of the magnetic field be larger?

A current-carrying straight wire is held in exactly vertical position. If the current passes through this wire in the vertically upward direction, what is the direction of magnetic field produced by it ? Name the rule used to find out the direction of magnetic field.