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The speed of electromagnetic wave in a m...

The speed of electromagnetic wave in a medium of dielectric constant 2.25 and relative permeability 4 is

A

`1 xx 10^(8) m//s`

B

`2.5 xx 10^(8)m//s`

C

`2 xx 10^(8)m//s`

D

`3 xx 10^(8)m//s`

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