Discussion
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- Question
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
- Correct Answer
- current increases
- 1. 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
- 2. Wirewound resistors are usually used in circuits that have:
Options- A. high current
- B. negative temperature coefficients
- C. low power
- D. high voltage Discuss
- 3. If resistance decreases, then current will:
Options- A. decrease
- B. increase
- C. remain the same
- D. double Discuss
- 4. 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
- 5. 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
- 6. 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
- 7. How many basic types of resistors exist?
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 8. How many connections does a potentiometer have?
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 9. Components designed to oppose the flow of current are called:
Options- A. insulators
- B. conductors
- C. resistors
- D. heat exchangers Discuss
- 10. With 1 mA of current, what wattage rating should a 470 ohm resistor have?
Options- A. 1/4 watt
- B. 1/2 watt
- C. 1 watt
- D. 2 watts Discuss
Resistance and Power problems
Search Results
Correct Answer: 5 MΩ
Correct Answer: high current
Correct Answer: increase
Correct Answer: fusible wire link
Correct Answer: current is inversely proportional to resistance
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.
Correct Answer: resistors
Correct Answer: 1/4 watt
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