JEE Advanced 2013 Paper 2

Section: Physics

Question : 3 of 60

Marks: +1, -0

A steady current I flows along an infinitely long hollow cylindrical conductor of radius R. This cylinder is placed coaxially inside an infinite solenoid of radius 2R. The solenoid has n turns per unit length and carries a steady current I. Consider a point P at a distance r from the common axis. The correct statement(s) is (are) :

[JEE Adv 2013 P2]

In the region 0 < r < R, the magnetic field is non-zero.
In the region R < r < 2R, the magnetic field is along the common axis.
In the region R < r < 2R, the magnetic field is tangential to the circle of radius r, centered on the axis.
In the region r > 2R, the magnetic field is non-zero

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