CFAA Fire Alarm Technician · Question
A fire alarm notification circuit operates at 24 VDC. If the measured current is 100mA, what is the total resistance of the circuit?
Using Ohm's Law R = V/I. R = 24V / 0.1A = 240 Ohms.
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Question: A fire alarm notification circuit operates at 24 VDC. If the measured current is 100mA, what is the total resistance of the circuit?
Answer options:
- 2.4 Ω
- 24 Ω ✅ 240 Ω
- 2400 Ω
Correct answer: 240 Ω
Explanation: Using Ohm's Law R = V/I. R = 24V / 0.1A = 240 Ohms.
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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?
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