46. An audio transformer has a turn ratio of 9, What is its impedance ratio?

A. 81
B. 85
C. 6
D. 9
E. None of the above

47. Which one of the following statements is true?

A. The secondary voltage for a step-down power transformer is greater than the primary voltage
B. The secondary current for a step-down power transformer is greater than the primary voltage
C. Parallel RLC circuit operated below its resonant frequency
D. purely resistive circuit
E. None of the above

48. How many protons does the nucleus of a silicon atom contain?

A. 4
B. 29
C. 14
D. 48
E. None of the above

49. A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

A. 3 V
B. 16 V
C. 7.5 V
D. 8 V
E. None of the above

50. The emitter diode is usually

A. Forward-biased
B. Reverse-biased
C. Nonconducting
D. Operating in the breakdown region
E. None of the above