CFAA Fire Alarm Technician · Question
A circuit has a 20 Ohm resistor (R1) in parallel with a branch containing two 10 Ohm resistors (R2 and R3) in series. What is the total resistance?
The series branch (R2+R3) = 10 + 10 = 20 Ohms. This 20 Ohm branch is in parallel with R1 (20 Ohms). Parallel of two 20 Ohms = 10 Ohms. Total = 10 Ohms.
Start free practice for CFAA Fire Alarm Technician
30 questions · no signup required · 40 free questions per day
Question: A circuit has a 20 Ohm resistor (R1) in parallel with a branch containing two 10 Ohm resistors (R2 and R3) in series. What is the total resistance?
Answer options:
- 30 Ω
- 20 Ω
- 15 Ω ✅ 10 Ω
Correct answer: 10 Ω
Explanation: The series branch (R2+R3) = 10 + 10 = 20 Ohms. This 20 Ohm branch is in parallel with R1 (20 Ohms). Parallel of two 20 Ohms = 10 Ohms. Total = 10 Ohms.
Start free practice for CFAA Fire Alarm Technician
30 questions · no signup required · 40 free questions per day
More about CFAA Fire Alarm Technician
Related Questions
- The primary power for a fire alarm system must be:
- If a 120VAC primary power circuit for a fire alarm control unit is consuming 60 Watts of power, what is the cu
- In a steady-state DC circuit, if the conductor length is doubled while maintaining voltage and wire gauge, wha
- A resistor is rated at 10 Watts at 24VDC. If the voltage drops to 20VDC, what is the new power dissipation?
- A circuit has a total resistance of 40 Ohms and is connected to a 24VDC source. What is the total power dissip
- Which of the following is NOT a direct component of Ohm's Law?
More for CFAA Fire Alarm Technician candidates
Study guides
FAQs
- How long is the CFAA Fire Alarm Technician exam? — CFAA Fire Alarm Technician
- How many questions are on the CFAA Fire Alarm Technician exam? — CFAA Fire Alarm Technician
- What is the passing score for the CFAA Fire Alarm Technician exam? — CFAA Fire Alarm Technician
- How often do I need to recertify CFAA Fire Alarm Technician? — CFAA Fire Alarm Technician
Question explanations
- The primary power for a fire alarm system must be:
- If a 120VAC primary power circuit for a fire alarm control unit is consuming 60 Watts of power, what is the cu
- In a steady-state DC circuit, if the conductor length is doubled while maintaining voltage and wire gauge, wha
- A resistor is rated at 10 Watts at 24VDC. If the voltage drops to 20VDC, what is the new power dissipation?
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free CFAA Fire Alarm Technician Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.