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ECE Objective Questions { Transmission Lines and Waveguides }



8. If maximum voltage reading on the above line is 50 V, the minimum voltage reading would be volt.
A.25
B.12.5
C.6.25
D.37.5

9. Regarding reflection co-efficient (Kr) of a transmission line which statement is not correct? It is the ratio of
A. reflected voltage to the incident voltage
B. reflectedcurrent to the incident current
C. reflected power to the incident power
D. characteristic impedance to load impedance

10. For perfect match between line and load, value of Kr should be
A.0
B.1
C. between 0 and 1
D. more than unity

11. In a transmission line, the ratio of reflected power to incident power is given bY
A. Kr
B. 1/K1
C. 1/I(2
D. Kr2

12. The reflection co-efficient resulting from mismatching a 50 LI load and a 150 n transmission line is
A.0.5
B.2
C.37.5
D. 1/75

13.  If a SWR of 4 : 1 exists on a line, then its reflection co-efficient is
A.0.8
B.0.6
C.0.25
D.1.67

14. If a SWR of 4 : 1 exists on a line, percentage reflected power is
A.36
B.60
C.66.7
D.40

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