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1)The field normal to the plane of a wire of n turns and radius r which carries a current I is measured on the axis of the coil at a small distance h from the centre of the coil.This is smaller than the field at the centre by the fraction. a) (3h^2)/(2r^2) b) (2h^2)/(3r^2) c) (3r^2)/(2h^2) d) (2r^2)/(3h^2) 2)The magnetic field inside a current carrying long wire of circular cross section varies as(r:distance from center) a) r^0 b)r c)r^2 d)r^3


1)The field normal to the plane of a wire of n turns and radius r which carries a current I is measured on the axis of the coil at a small distance h from the centre of the coil.This is smaller than the field at the centre by the fraction.

a)  (3h^2)/(2r^2)             b)  (2h^2)/(3r^2)                    c)  (3r^2)/(2h^2)                  d)  (2r^2)/(3h^2)

2)The magnetic field inside a current carrying long wire of circular cross section varies as(r:distance from center)

a) r^0                    b)r                c)r^2                          d)r^3


Grade:upto college level

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