question_answer 49)

  The strength of magnetic field inside a Long current carrying straight solenoid is (a) more at the ends than at the centre                 (b) minimum in the middle (c) same at all points                                                       (d) found to increase from one end to the other

Answer:

                  (c) The strength of magnetic field lines inside a long current carrying straight solenoid same at all points because the magnetic field lines are straight, equal-spaced and parallel to the axis of solenoid and hence uniform magnetic field exist inside the solenoid.