A student performs an experiment to study the magnetic effect of current around a current carrying straight conductor. He reports that:(i) the direction of deflection of the north pole of a compass needle kept at a given point near the conductor remains unaffected even when the terminals of the battery sending current in the wire are interchanged.(ii) for a given battery, the degree of deflection of a N-pole decreases when the compass is kept at a point farther away from the conductor.Which of the above observations of the student is incorrect and why?

A student performs an experiment to study the magnetic effect of curre

1.	A student performs an experiment to study the magnetic effect of current around a current carrying straight conductor. He reports that:(i) the direction of deflection of the north pole of a compass needle kept at a given point near the conductor remains unaffected even when the terminals of the battery sending current in the wire are interchanged.(ii) for a given battery, the degree of deflection of a N-pole decreases when the compass is kept at a point farther away from the conductor.Which of the above observations of the student is incorrect and why?
Answer» A student performs an experiment to study the magnetic effect of current around a current carrying straight conductor. He reports that: (i) the direction of deflection of the north pole of a compass needle kept at a given point near the conductor remains unaffected even when the terminals of the battery sending current in the wire are interchanged. (ii) for a given battery, the degree of deflection of a N-pole decreases when the compass is kept at a point farther away from the conductor. Which of the above observations of the student is incorrect and why?