Electronics-Resistance and Power

Electronics-Resistance and Power
51. How is power dissipated in a resistor?
  • by resistance
  • by voltage
  • by current
  • by heat
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52. Resistance in a circuit is:
  • opposition to current
  • opposition to voltage
  • the same as current
  • the same as voltage
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53. The unit designator for resistance value is the:
  • ampere
  • ohm
  • volt
  • watt
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54. One ampere of current flowing through one ohm of resistance is equal to:
  • 1 horsepower
  • 1 Btu
  • 1 watt
  • 1 joule
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55. Good insulators:
  • have few electrons in their outer shells
  • have a large dielectric strength
  • have a small breakdown voltage
  • have many electrons in the nucleus
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56. A 12-volt battery is delivering 3 amperes to a resistor. The power dissipated by the resistor is 4 watts.
  • TRUE
  • FALSE
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57. Resistance limits the flow of current.
  • TRUE
  • FALSE
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58. A digital voltmeter can be used to measure resistance.
  • TRUE
  • FALSE
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59. Carbon composition resistors are the most common and the least expensive type of fixed-value resistor.
  • TRUE
  • FALSE
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60. In a resistive circuit, if the voltage increases, the current will increase.
  • TRUE
  • FALSE
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Electronics
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