The ratio of the radii required to give a 60 ohm coaxial

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The ratio of the radii required to give a 60 ohm coaxial line filled with PTFE of ∈_r = 2, µ_r = 1 is—

1. 4.1: 1
2. 3.25: 1
3. 1: 1
4. 7.39: 1

Correct Option: A

The equation to be used is for 2 wire line

Z₀ =	120	In	2D
	√∈_r		d