Voltage, Current and Resistance problems
- 1. A red, red, orange, gold resistor has a nominal value of
Options- A. 22,000 Ω
- B. 2,200 Ω
- C. 22 Ω
- D. 2.2 Ω Discuss
Correct Answer: 22,000 Ω
- 2. The maximum resistance value for a brown, red, yellow, gold resistor is
Options- A. 126,000 Ω
- B. 126,600 Ω
- C. 114,000 Ω
- D. 132,000 Ω Discuss
Correct Answer: 126,000 Ω
- 3. A circuit breaker is a
Options- A. fuse
- B. switch
- C. resettable protective device
- D. resistor Discuss
Correct Answer: resettable protective device
- 4. The minimum resistance value for a blue, gray, red, silver resistor is
Options- A. 612 Ω
- B. 6,120 Ω
- C. 6,800 Ω
- D. 6,460 Ω Discuss
Correct Answer: 6,120 Ω
Explanation:
Because of 10% tolerance(last color silver), this resistance may vary 10% of 6800.
Minimum resistance value = 6800 - 680 = 6120
Maximum resistance value = 6800 + 680 = 7480
- 5. A multimeter measures
Options- A. current
- B. voltage
- C. resistance
- D. current, voltage, and resistance Discuss
Correct Answer: current, voltage, and resistance
- 6. A neutral atom with an atomic number of five has how many electrons?
Options- A. 1
- B. 5
- C. none
- D. depends on the type of atom Discuss
Correct Answer: 5
- 7. Materials with lots of free electrons are called
Options- A. conductors
- B. insulators
- C. semiconductors
- D. filters Discuss
Correct Answer: conductors
- 8. When the current is 2.5 A, how many coulombs pass a point in 0.2 s?
Options- A. 12.5 C
- B. 1.25 C
- C. 0.5 C
- D. 5 C Discuss
Correct Answer: 0.5 C
- 9. The colored bands for a 4,700 ohm resistor with a ten percent tolerance are
Options- A. yellow, violet, red, gold
- B. yellow, violet, orange, gold
- C. yellow, violet, red, silver
- D. orange, violet, red, silver Discuss
Correct Answer: yellow, violet, red, silver
- 10. The unit of electrical charge is the
Options- A. coulomb
- B. joule
- C. volt
- D. watt Discuss
Correct Answer: coulomb
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