What is expression for amplitude of reflected wave?

Q.  What is the expression for the amplitude of the reflected wave?
- Published on 30 Sep 15

a. Ir = [ (R + Z) / (R - Z) ] It
b. Ir = [ (R - Z) / Z ] It
c. Ir = [ (R - Z) / (R + Z) ] It
d. Ir = [ (R + Z) / Z ] It

ANSWER: Ir = [ (R - Z) / (R + Z) ] It

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