Discussion
Home ‣ Electronics ‣ Resistance and Power Comments
- Question
Power is defined as:
Options- A. the rate at which energy is used
- B. watts
- C. energy
- D. the rate at which energy is generated
- Correct Answer
- the rate at which energy is used
- 1. What happens to current and resistance if the voltage doubles?
Options- A. Current doubles and resistance doubles.
- B. Current doubles and resistance is halved.
- C. Current remains the same and resistance doubles.
- D. Current doubles and resistance remains the same. Discuss
- 2. What is the power dissipated by a 1.2 kΩ resistor with 12 volts across it?
Options- A. 12 W
- B. 1.2 W
- C. .12 W
- D. 12 mW Discuss
- 3. One ampere of current flowing through one ohm of resistance is equal to:
Options- A. 1 horsepower
- B. 1 Btu
- C. 1 watt
- D. 1 joule Discuss
- 4. What are the parts of a rheostat?
Options- A. wiper and resistor track
- B. solenoid and armature
- C. contact and wire wound
- D. center tape and wiper Discuss
- 5. A good fuse will have:
Options- A. zero ohms resistance
- B. a medium resistance
- C. a high resistance
- D. an infinite resistance Discuss
- 6. A 22-gauge wire will have a diameter in mils of:
Options- A. 10.03
- B. 22.35
- C. 45.26
- D. 71.96 Discuss
- 7. The word work means that:
Options- A. energy has been transferred
- B. it is inversely related to energy
- C. no energy has been transferred
- D. work and energy are not related Discuss
- 8. What property does an incandescent lamp possess?
Options- A. cold resistance
- B. hot resistance
- C. ballast resistance
- D. both cold and hot resistance Discuss
- 9. Ohm's law is not:
Options- A. V = IR
- B. I = V/R
- C. R = IV
- D. R = V/I Discuss
- 10. Good insulators:
Options- A. have few electrons in their outer shells
- B. have a large dielectric strength
- C. have a small breakdown voltage
- D. have many electrons in the nucleus Discuss
Resistance and Power problems
Search Results
Correct Answer: Current doubles and resistance remains the same.
Correct Answer: .12 W
Correct Answer: 1 watt
Correct Answer: wiper and resistor track
Correct Answer: zero ohms resistance
Correct Answer: 22.35
Correct Answer: energy has been transferred
Correct Answer: both cold and hot resistance
Correct Answer: R = IV
Correct Answer: have a large dielectric strength
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