GATE EC 1997 Electromagnetics Solution Q 2

GATE EC 1997 Electromagnetics Solution Q 2

A rectangular air filled waveguide has a cross section of  4 cm × 10 cm. The minimum frequency which can propagated in the waveguide is_______.

a) 1.5 GHz

b) 2.0 GHz

c) 2.5 GHz

d) 3.0 GHz

Ans- a)

Explanation

f_c=\frac{v_o}{2a} a=10\;cm\;\;and\;\;\;v_o=3\times10^8\;m/sec

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