Voltage, Current and Resistance problems
- 1. 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
Correct Answer: 0.2 A
- 2. 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
Correct Answer: 24 A
- 3. Which of the following is not a type of energy source?
Options- A. generator
- B. rheostat
- C. solar cell
- D. battery Discuss
Correct Answer: rheostat
- 4. 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
Correct Answer: a switch is closed
- 5. A two-terminal variable resistor is known as a
Options- A. potentiometer
- B. thermistor
- C. rheostat
- D. wiper Discuss
Correct Answer: rheostat
- 6. The conductance of an 8 ohm resistance is
Options- A. 12.5 mS
- B. 8 mS
- C. 12 S
- D. 125 mS Discuss
Correct Answer: 125 mS
- 7. A material that does not allow current under normal conditions is a(n)
Options- A. insulator
- B. conductor
- C. semiconductor
- D. valence Discuss
Correct Answer: insulator
- 8. An ammeter is an electrical instrument used to measure
Options- A. current
- B. voltage
- C. resistance
- D. none of the above Discuss
Correct Answer: current
- 9. A thermistor is a type of
Options- A. switch
- B. resistor
- C. battery
- D. power supply Discuss
Correct Answer: resistor
- 10. Electrons in the outer orbit are called
Options- A. nuclei
- B. valences
- C. waves
- D. shells Discuss
Correct Answer: valences
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