Correct Answer : Option (C) : Solenoidal, irrotational
Explanation : Since the vector field does not diverge (moves in a straight path), the divergence is zero. Also, the path does not possess any curls, so the field is irrotational.
Correct Answer : Option (C) : Power radiated per unit solid angle in that direction
Correct Answer : Option (B) : A quarter wave line
Correct Answer : Option (D) : Larger wavelength than in the free space