The property which is not of an electromagnetic wave travelling in free space is that: (a) They are transverse in nature (b) The energy density in electric field is equal to energy density in magnetic field (c) They travel with a speed equal to (1)/(√(μ₀ε₀)) (d) They originate from charges moving with uniform speed

Answer: (d). EM waves in free space are transverse and travel at c = (1)/(√(μ₀ε₀)). Average energy density is shared equally: 1/2ε₀ E² = (B²)/(2μ₀). A charge moving with uniform speed gives steady fields only; EM waves come from accelerated charges. So the answer is (d).

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Nature of EM Waves & Wave Equation

The property which is not of an electromagnetic wave travelling in free space is that:

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Answer: (d)

EM waves in free space are transverse and travel at $c = \frac{1}{\sqrt{\mu_0\varepsilon_0}}$ .
Average energy density is shared equally: $\frac{1}{2}\varepsilon_0 E^2 = \frac{B^2}{2\mu_0}$ .
A charge moving with uniform speed gives steady fields only; EM waves come from accelerated charges.
So the answer is (d).

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