1.

For TM mode. The wave equation in cylindrical co ordinates is:

A. (∂<sup>2</sup>/∂ρ<sup>2</sup>+1/ρ ∂/∂ρ + 1/ρ<sup>2</sup> (∂<sup>2</sup>/∂∅<sup>2</sup> + kc<sup>2</sup>) =0
B. ∂<sup>2</sup>E<sup>2</sup>/∂ρ<sup>2</sup> + 1/ρ ( ∂E/∂ρ)=0
C. ∂<sup>2</sup>E<sup>2</sup>/∂ρ<sup>2</sup> + 1/ρ<sup>2</sup> (∂<sup>2</sup>E<sup>2</sup>/∂∅<sup>2</sup> ) = 0
D. None of the mentioned
Answer» B. ‚Äö√Ñ√∂‚àö‚Ć‚àö√°<sup>2</sup>E<sup>2</sup>/‚Äö√Ñ√∂‚àö‚Ć‚àö√°‚âà√¨‚àö√ñ<sup>2</sup> + 1/‚âà√¨‚àö√ñ ( ‚Äö√Ñ√∂‚àö‚Ć‚àö√°E/‚Äö√Ñ√∂‚àö‚Ć‚àö√°‚âà√¨‚àö√ñ)=0


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