11. What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with a capacitor that has a reactance of 100 ohm?

A. 60 Ohm
B. 99.3 Ohm
C. 250 Ohm
D. 70.7 Ohm
E. None of the above

12. Current can flow through a normally open push button switch as long as:

A. you are pressing the button
B. you are not pressing the button
C. its contact remain open
D. its contact remain open
E. None of the above

13. Doubling the operating frequency of a purely capacitive circuit:

A. has no effect on the total circuit current
B. doubles the amount of total current
C. cuts the total current by one-half
D. thrice the amount of total current
E. None of the above

14. How much current flows through a 0.02 micro F capacitor that is operating from a 12-V ac, 100-Hz source?

A. 0.151 mA
B. 157 raA
C. 0.995 mA
D. 2.02 A
E. None of the above

15. An unloaded zener regulator has a source voltage of 20 V, a series resistance of 330 W, and a zener voltage of 12 V, What is the Zener current?

A. 28.4 mA
B. 24.2 mA
C. 34.4 mA
D. 68.4 mA
E. None of the above