Electronic Principles – Section 2

11. The direction of electron current flow is:

A. from right to left
B. from positive to negative
C. from negative to positive
D. from neutral to positive
E. None of the above

Correct Answer:  C. from negative to positive

12. A device that converts mechanical pressure to electrical energy is called a:

A. piezoelectric device
B. solar cell
C. photodiode
D. nicad cell
E. None of the above

Correct Answer:  A. piezoelectric device

13. Which one of the following statements is true for the voltage in a parallel RC circuit?

A. The voltage always has the same amplitude and phase for every part of the circuit
B. The total voltage is equal to the sum of the voltages across the resistance and capacitance
C. The total voltage leads the total current by less than 90 degree
D. The total voltage is less than the sum of the voltages across the resistance and capacitance
E. None of the above

Correct Answer:  A. The voltage always has the same amplitude and phase for every part of the circuit

14. The Thevenin resistance is equal in value to the

A. Load resistance
B. Half the load resistance
C. Internal resistance of a Morton circuit
D. Open-load resistance
E. None of the above

Correct Answer:  A. Load resistance

15. Most AC power is obtained from:

A. generators
B. batteries
C. oscillators
D. lightning
E. None of the above

Correct Answer:  C. oscillators

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