Electronics-Resistance and Power

Electronics-Resistance and Power
11. With Ohm's law:
  • current is inversely proportional to resistance
  • resistance is directly proportional to voltage
  • voltage is indirectly proportional to power
  • current is directly proportional to resistance
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12.  Power is defined as:
  • the rate at which energy is used
  • watts
  • energy
  • the rate at which energy is generated
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13. What is the most commonly used conductor in electronics?
  • aluminum
  • copper
  • gold
  • silver
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14. With Ohm's law, no change in resistance means that current and voltage will be:
  • directly proportional
  • unable to produce energy
  • the same
  • inversely proportional
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15. A potentiometer has how many leads?
  • 1
  • 2
  • 3
  • 4
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16. What is the ratio of 13 to 47 expressed in percent?
  • 2.76%
  • 27.7%
  • 3.60%
  • 36.1%
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17. What happens to current and resistance if the voltage doubles?
  • Current doubles and resistance doubles.
  • Current doubles and resistance is halved.
  • Current remains the same and resistance doubles.
  • Current doubles and resistance remains the same.
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18. One problem with mechanically variable resistors is noticeable in audio circuits as:
  • scratchy noise
  • lack of bass response
  • variable volume
  • too much treble response
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19. A color code of orange, orange, orange is for what ohmic value?
  • 22 kilohms
  • 3300 ohms
  • 44000 ohms
  • 33 kilohms
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20. A conductor's cross-sectional area in circular mils for onehalf.gif inch is:
  • 500 cmils
  • 100,000 cmils
  • 1,000,000 cmils
  • 500,000,000 cmils
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Electronics
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