Discussion
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- Question
The resistivity of copper is:
Options- A. 9.9 Ω
- B. 10.7 Ω
- C. 16.7 Ω
- D. 17.0 Ω
- Correct Answer
- 10.7 Ω
- 1. If a metallic conductor has a positive temperature coefficient of resistance, then:
Options- A. as temperature increases, resistance decreases
- B. as current increases, resistance decreases
- C. as voltage increases, current increases
- D. as temperature increases, resistance increases Discuss
- 2. Which is the most important step utilized when measuring resistors?
Options- A. use the highest possible scale
- B. keep test leads short
- C. zero the meter before using
- D. remove power from the circuit Discuss
- 3. The unit designator for resistance value is the:
Options- A. ampere
- B. ohm
- C. volt
- D. watt Discuss
- 4. How much energy is stored if 6.24 x 1018 electrons are stored in 4 volts?
Options- A. 4 joules
- B. 1.56 x 1018 electrons
- C. 1.56 coulombs
- D. 2.496 x 1019 electrons Discuss
- 5. How is a 3.9 kΩ resistor color-coded?
Options- A. red, white, red, gold
- B. red, green, orange, silver
- C. orange, white, red, gold
- D. orange, green, orange, silver Discuss
- 6. What is the ratio of 13 to 47 expressed in percent?
Options- A. 2.76%
- B. 27.7%
- C. 3.60%
- D. 36.1% Discuss
- 7. How is power dissipated in a resistor?
Options- A. by resistance
- B. by voltage
- C. by current
- D. by heat Discuss
- 8. What is the most commonly used conductor in electronics?
Options- A. aluminum
- B. copper
- C. gold
- D. silver Discuss
- 9. The load resistance increases. How will the load current change?
Options- A. vary
- B. remain constant
- C. increase
- D. decrease Discuss
- 10. With Ohm's law:
Options- A. current is inversely proportional to resistance
- B. resistance is directly proportional to voltage
- C. voltage is indirectly proportional to power
- D. current is directly proportional to resistance Discuss
Resistance and Power problems
Search Results
Correct Answer: as temperature increases, resistance increases
Correct Answer: remove power from the circuit
Correct Answer: ohm
Correct Answer: 4 joules
Correct Answer: orange, white, red, gold
Correct Answer: 27.7%
Correct Answer: by heat
Correct Answer: copper
Correct Answer: decrease
Correct Answer: current is inversely proportional to resistance
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