Electronic Principles – Section 2

41. What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with an inductor that has a reactance of 200 W?

A. 77.7 ohm
B. 89.3 ohm
C. 88.8 ohm
D. 224 ohm
E. None of the above

Correct Answer:  B. 89.3 ohm

42. The nucleus of the copper atom contains how many protons?

A. 1
B. 4
C. 18
D. 29
E. None of the above

Correct Answer:  D. 29

43. Which one of the following statements is true for voltage in a series circuit?

A. The total voltage is equal to the sum of the individual voltages in a series circuit
B. The total voltage in a series circuit is equal to the average value of the individual voltages
C. The total voltage of a series circuit is equal to the total current divided by the total resistance
D. The total voltage in a series circuit is always less than the value of the smallest voltage
E. None of the above

Correct Answer:  A. The total voltage is equal to the sum of the individual voltages in a series circuit

44. A basic capacitor is composed of:

A. two conductors separated by a dielectric
B. two dielectrics separated by a conductor
C. two coils separated by a dielectric
D. two coils separated by a conductor
E. None of the above

Correct Answer:  A. two conductors separated by a dielectric

45. Which one of the following devices is most often used for measuring electrical potential difference?

A. Voltmeter
B. Ohmmeter
C. Ammeter
D. Wattmeter
E. None of the above

Correct Answer:  A. Voltmeter

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