CFAA Fire Alarm Technician · Question
A notification appliance circuit (NAC) has a resistance of 2.0 Ohms and a current draw of 1.5 Amps. What is the calculated voltage drop across the wire?
Voltage Drop = Current x Resistance. E = 1.5A x 2.0 Ohms = 3 Volts.
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Question: A notification appliance circuit (NAC) has a resistance of 2.0 Ohms and a current draw of 1.5 Amps. What is the calculated voltage drop across the wire?
Answer options:
- 1.5 V ✅ 3.0 V
- 0.75 V
- 4.0 V
Correct answer: 3.0 V
Explanation: Voltage Drop = Current x Resistance. E = 1.5A x 2.0 Ohms = 3 Volts.
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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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