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A wave is propagated in a waveguide at frequency of 9 GHz and separation is 2 cm between walls Calculate group velocity for dominant mode.

1.8 x 108 m/sec
5 x 108 m/sec
3 x 108 m/sec
1.5 x 108 m/sec

Correct Answer: 1.8 x 108 m/sec

Explanation:

V_g . V_p = C²

where

.

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