1.

A lossless transmission line having 50 Ω characteristic impedance and length λ⁄4 is short circuited at one end and connected to an ideal voltage source of 1V at the other end. The current drawn from the voltage sources is (a) 0 (b)0.02 A (c) ∞ (d)None of the these

Answer»

Correct option (a) 0

Explanation:

For quarter wave transformer (λ⁄4)

zin = z20/zL

zL = 0 (short circuit) 

zin = z20/0 = ∞ (open circuit) 

The current drawn from the voltage source 

Is = Vs/zin = Vs/∞ = 0



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