Electronic Principles – Section 4

31. What is the power dissipation of a resistance that has 24 V dropped across it and 0.25 A flowing through it?

A. 3 W
B. 6 W
C. 64 W
D. 122 W
E. None of the above

Correct Answer:  B. 6 W

32. Which one of the following kinds of materials has the highest permeability?

A. A diamagnetic material
B. A ferromagnetic material
C. A paramagnetic material
D. All of the above
E. None of the above

Correct Answer:  B. A ferromagnetic material

33. Inductive reactance is measured in units of:

A. volts per second
B. amperes per second
C. Ohm
D. henrys
E. None of the above

Correct Answer:  C. Ohm

34. What is the difference between the kinds of charges for an electron and a proton?

A. An electron has a positive charge and a proton has no charge
B. An electron has a positive charge and a proton has a negative charge
C. An electron has a negative charge and a proton has a positive charge
D. An electron has a negative charge and a proton has no charge
E. None of the above

Correct Answer:  C. An electron has a negative charge and a proton has a positive charge

35. An ideal voltage source has

A. Zero internal resistance
B. Infinite internal resistance
C. A load dependent voltage
D. A load-dependent current
E. None of the above

Correct Answer:  A. Zero internal resistance

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