An electric charge oscillating with a frequency of 1 kilo cycles/* can radiates electromagnetic waves of wavelength
(A) 100km
(B) 200km
(C) 300km
(D) 400km
The correct option is (C) 300km.
Explanation:
f = 1 kilocycle/ = 1 × 103 cycle/ = 103Hz
λ = [(velocity) / (frequency)]
λ = (c/f) = [(3 × 108) / 103] = 3 × 105 = 300km.
