Power Systems
Find the characteristic impedance of a transmission line, if impedance is 16 Ω and admittance is 0.1 mâ„§?

 160 Ω
 320 Ω
 400 Ω
 200 Ω

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Power Systems
The skin effect shows that

 current density is more at the centre of the condutor
 current density is lower at the surface of the condutor
 current density is more at the surface of the condutor
 the distribution of AC current is uniform through the cross section of the conductor

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