A student performs an experiment to study the magnetic effect of electric current around a current carrying straight conductor . He reports that
(a) 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.
(b) for a given battery, the degree of deflection of a North Pole decreases when the compass is kept at a point farther away from the conductor.
Which of the above situation of the student is incorrect and why?
Answers
Answer:
first situation is wrong and second situation is true
Explanation:
in first situations it is given that when the current in the conductor changes its direction then the direction of deflection of compass do not change but it is false as due to change in direction of current the direction of magnetic field lines change and the direction of deflection of compass also change.
whereas in the second situation it is given that when the compass needle is placed far away from the current carrying conductor and the deflection of compass needle decreases and it is true as on increasing the distance the strength of magnetic field lines decreases therefore deflection also decreases
Answer:
first situation is wrong and second situation is true
Explanation:
in first situations it is given that when the current in the conductor changes its direction then the direction of deflection of compass do not change but it is false as due to change in direction of current the direction of magnetic field lines change and the direction of deflection of compass also change.
whereas in the second situation it is given that when the compass needle is placed far away from the current carrying conductor and the deflection of compass needle decreases and it is true as on increasing the distance the strength of magnetic field lines decreases therefore deflection also decreases
Explanation: