Question 13024 of 731 · Texas Journeyman Electrician Exam
Resistors of 6, 3 and 2 ohms are connected in parallel. What is the total resistance?
Exactly one answer is correct.
You got of questions right. Here on the question pages nobody remembers which ones you got wrong. The trainer saves your progress and asks the mistakes again until they stick.
Or free: the 10 questions most people get wrong
Show solution
Correct answer to question 13024
- D: 1 ohm
Explanation
For parallel resistors, 1 / RT = 1/6 + 1/3 + 1/2 = 1, so RT = 1 ohm. Adding them (11 ohms) is the series rule, and the total of a parallel group is always smaller than its smallest branch.
More questions: Electrical Calculations
- 13025A 10 ohm and a 15 ohm resistor are connected in parallel. What is the equivalent resistance?
- 13026A 4 ohm resistor is connected in series with a parallel group of 6 ohms and 12 ohms, and the circuit is supplied at 120 volts. What is the total current?
- 13027Four identical 40 ohm heating elements are connected in parallel. What is the combined resistance?
- 13028Resistors of 5, 10 and 15 ohms are connected in series across 120 volts. What is the voltage across the 10 ohm resistor?
- 13031A 120 volt single-phase branch circuit uses 12 AWG copper (6,530 circular mils), runs 100 feet one way and carries 16 A. Using K = 12.9, what is the voltage drop?
- 13032A 240 volt single-phase circuit of 10 AWG copper (10,380 circular mils) supplies 24 A at 150 feet one way. What is the voltage drop as a percentage of the supply voltage?