Discussion
Home ‣ Electronics ‣ Resistance and Power Comments
- Question
Wirewound resistors are usually used in circuits that have:
Options- A. high current
- B. negative temperature coefficients
- C. low power
- D. high voltage
- Correct Answer
- high current
- 1. If resistance decreases, then current will:
Options- A. decrease
- B. increase
- C. remain the same
- D. double Discuss
- 2. Electrical equipment is protected against excessive current by a(n):
Options- A. fusible wire link
- B. insulated glass container
- C. metal ended coil
- D. circuit opener Discuss
- 3. 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
- 4. The load resistance increases. How will the load current change?
Options- A. vary
- B. remain constant
- C. increase
- D. decrease Discuss
- 5. What is the most commonly used conductor in electronics?
Options- A. aluminum
- B. copper
- C. gold
- D. silver Discuss
- 6. How many ohms of resistance allows a current of 720 µA to flow when 3.6 kV is applied?
Options- A. 200 nΩ
- B. 5 kΩ
- C. 200 kΩ
- D. 5 MΩ Discuss
- 7. With Ohm's law, if voltage increases and resistance stays the same:
Options- A. current remains the same
- B. power decreases
- C. current increases
- D. resistance decreases Discuss
- 8. The six basic forms of energy are:
Options- A. light, sun, magnetic, chemical, electrical, and mechanical
- B. electrical, mechanical, light, heat, magnetic, and chemical
- C. electrical, mechanical, sun, heat, chemical, and light
- D. potential, sun, light, chemical, electrical, and mechanical Discuss
- 9. How many basic types of resistors exist?
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 10. How many connections does a potentiometer have?
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
Resistance and Power problems
Search Results
Correct Answer: increase
Correct Answer: fusible wire link
Correct Answer: current is inversely proportional to resistance
Correct Answer: decrease
Correct Answer: copper
Correct Answer: 5 MΩ
Correct Answer: current increases
Correct Answer: electrical, mechanical, light, heat, magnetic, and chemical
Correct Answer: 2
Correct Answer: 3
Explanation:
A potentiometer uses three connections, as opposed to a rheostat, which only employs two. Having three connections allows the potentiometer to vary voltage. Both the potentiometer and the rheostat are classified as variable resistors.
Comments
There are no comments.More in Electronics:
Programming
Copyright ©CuriousTab. All rights reserved.