State the rule that is used to find the direction of magnetic field acting at a point near a current carrying straight conductor.

State the rule that is used to find the direction of field acting at a point near a current carrying straight conductor.

State the rule that is used to find the direction of field acting at a point near a current carrying straight conductor.

Mention the rule that is used to find the direction of force acting at a point near a current carrying straight conductor

State the rule which is used to find the direction of field acting at a point near a current carrying street conductors?

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.