A half wavelength dipole is kept in the x-y plane and orient

General Aptitude
Electronics and comm.

M: +2.00/-0.66

A half wavelength dipole is kept in the x-y plane and oriented along 45^ofrom the x-axis. Determine the direction of null in the radiation pattern for 0≤θ≤π. Here the angle θ (0≤θ≤π) is measured from the z-axis, and the angle ∅(0≤∅≤2π) is measured from the x-axis in the x-y plane.

[GATE EC 2017 Set 1]

A θ=90 °, ∅=45 °

B θ=45 °, ∅=90 °

C θ=90 °, ∅=135 °

D θ=45 °, ∅=135 °