Below are the answers key for the Multiple Choice Questions (MCQs) in Chapter 15: Impedance and Admittance from the book Teach Yourself Electricity and Electronics, 5th edition by Stan Gibilisco.
1. Can never be positive.
2. Has a real part and an imaginary part.
3. 0 + j0
4. -9 + j12.
5. -38 – j34.
6. 30.
7. A pure resistance.
8. A pure capacitance.
9. Z = 6.7 Ω.
10. Z = 240 Ω.
11. It will increase.
12. R + jX =100 + j0.
13. j0. 209.
14. –j0.060.
15. Admittance.
16. R2 + X2.
17. Siemens.
18. Positive and imaginary.
19. Characteristic impedance is complex.
20. The less the flow of alternating current.
