Discussion
Home ‣ Electrical Engineering ‣ Voltage, Current and Resistance Comments
- Question
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
- Correct Answer
- yellow, violet, red, silver
- 1. 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
- 2. Materials with lots of free electrons are called
Options- A. conductors
- B. insulators
- C. semiconductors
- D. filters Discuss
- 3. 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
- 4. A multimeter measures
Options- A. current
- B. voltage
- C. resistance
- D. current, voltage, and resistance Discuss
- 5. 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
- 6. The unit of electrical charge is the
Options- A. coulomb
- B. joule
- C. volt
- D. watt Discuss
- 7. Eight-tenths coulomb passes a point in 4 s. The current in amperes is
Options- A. 1.6 A
- B. 16 A
- C. 2 A
- D. 0.2 A Discuss
- 8. The current in a given circuit is not to exceed 24 A. Which value of fuse is best?
Options- A. a fuse is not necessary
- B. 10 A
- C. 24 A
- D. 20 A Discuss
- 9. Which of the following is not a type of energy source?
Options- A. generator
- B. rheostat
- C. solar cell
- D. battery Discuss
- 10. Current flows in a circuit when
Options- A. a switch is opened
- B. a switch is closed
- C. the switch is either open or closed
- D. there is no voltage Discuss
Voltage, Current and Resistance problems
Search Results
Correct Answer: 0.5 C
Correct Answer: conductors
Correct Answer: 5
Correct Answer: current, voltage, and resistance
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
Correct Answer: coulomb
Correct Answer: 0.2 A
Correct Answer: 24 A
Correct Answer: rheostat
Correct Answer: a switch is closed
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