Electronic Principles – Section 3

26. If a load resistance is 1 kW, a stiff voltage source has a resistance of

A. At least 10 Ohm
B. less than 10 Ohm
C. More than 100 k Ohm
D. Less than 100 k Ohm
E. None of the above

Correct Answer:  B. less than 10 Ohm

27. A typical light switch in your home is a:

A. knife switch
B. toggle switch
C. rotary switch
D. momentary push button switch
E. None of the above

Correct Answer:  B. toggle switch

28. Suppose the voltage from a power outlet is 120 Vrms. What is the peak voltage?

A. 100 V
B. 120 V
C. 170 V
D. 180 V
E. None of the above

Correct Answer:  C. 170 V

29. A device that converts thermal energy to electrical energy is called a:

A. thermocouple
B. solar cell
C. chemical cell
D. piezoelectric devices
E. None of the above

Correct Answer:  A. thermocouple

30. How much power is being dissipated by a 1000 W resistance that has 25 V applied to it?

A. 0.24 W
B. 0.625 W
C. 80 W
D. 325 kW
E. None of the above

Correct Answer:  B. 0.625 W

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