At magnetic north pole of the earth the values of horizontal component H arıd angle of dip are :

Options

A. `H = 0, theta = 45^(@)`
B. `H ne 0 , theta = 0^(@)`
C. `H = 0 , theta = 90^(@)`
D. `H ne 0 , theta = 90^(@)`

Answer

C

Explanation

At north pole , magnetic lines of forces of will be vertical and the magnet will be vertical (north pole pointing downwards) . Thus H = 0 and angle of dip `(theta)` is `90^(@)` at that place .