An electric charge oscillating with a frequency of $1 k i l o c y c l e s / s$ can radiate electromagnetic waves of wavelength.

$100 k m$

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$200 k m$

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$300 k m$

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$400 k m$

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Solution

The correct option is C
$300 k m$

Step1. Given data:
Frequency of the electromagnetic wave $f = 1 k i l o c y c l e s / s$ $= 1 x 10^{3} c y c l e s / s = 10^{3} H z$
Velocity of the electromagnetic wave is $c = 3 \times 10^{8} m / s$
Step2. Find the wavelength of electromagnetic wave:
$λ = v e l o c i t y / f r e q u e n c y$
$= c / f = (3 x 10^{8}) / 10^{3}$
$= 3 x 10^{5} m = 300 k m$
Hence, option (C) is correct.

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An electric charge oscillating with a frequency of 1kilocycles/s can radiate electromagnetic waves of wavelength.

An electric charge oscillating with a frequency of $1 k i l o c y c l e s / s$ can radiate electromagnetic waves of wavelength.