Discussion
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- Question
A conductor's cross-sectional area in circular mils for
inch is:
Options- A. 500 cmils
- B. 100,000 cmils
- C. 1,000,000 cmils
- D. 500,000,000 cmils
- Correct Answer
- 1,000,000 cmils
- 1. Resistor tolerance is either printed on the component, or is provided by:
Options- A. keyed containers
- B. size
- C. color code
- D. ohmmeter reading Discuss
- 2. If a variable resistor's resistance varies in a nonuniform manner as the shaft is moved, it is considered to be:
Options- A. linear
- B. defective
- C. not wirewound
- D. tapered Discuss
- 3. 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
- 4. Components designed to oppose the flow of current are called:
Options- A. insulators
- B. conductors
- C. resistors
- D. heat exchangers Discuss
- 5. How many connections does a potentiometer have?
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 6. What type of resistors have a tolerance rating of 5% or greater?
Options- A. precision
- B. SIP
- C. general-purpose
- D. wirewound Discuss
- 7. For P = V2/R, a decrease in resistance should produce:
Options- A. a decrease in power
- B. an increase in ohms
- C. an increase in power
- D. a decrease in current Discuss
- 8. One advantage of a carbon film resistor over a carbon composition resistor is:
Options- A. less circuit noise
- B. smaller size
- C. higher wattage
- D. poor tolerance Discuss
- 9. Which formula shows a direct proportionality between power and voltage?
Options- A. V = IR
- B. P = VI
- C. P = IR
- D. I = V/R Discuss
- 10. A potentiometer has how many leads?
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
Resistance and Power problems
Search Results
Correct Answer: color code
Correct Answer: tapered
Correct Answer: 1/4 watt
Correct Answer: resistors
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: general-purpose
Correct Answer: an increase in power
Correct Answer: less circuit noise
Correct Answer: P = VI
Correct Answer: 3
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