An alarm system has a total current draw of 1 amp. If the control panel draws 0.4 amps, the keypad draws 0.2 amps, and the glass break detector draws 0.1 amp, what is the current draw of each motion detector?

An alarm system has a total current draw of 1 amp. If the control panel draws 0.4 amps, the keypad draws 0.2 amps, and the glass break detector draws 0.1 amp, what is the current draw of each motion detector?

• A. 0.05 amps
• B. 0.1 amps
• C. 0.15 amps
• D. 0.2 amps

Answer: (C)

To determine the current draw of each motion detector in the alarm system, first, we need to account for the total current draw and subtract the current consumed by the other components.

The alarm system has a total current draw of 1 amp. The control panel consumes 0.4 amps, the keypad consumes 0.2 amps, and the glass break detector consumes 0.1 amp. By adding these currents together, we can find the total current used by these components:

0.4 amps (control panel) + 0.2 amps (keypad) + 0.1 amp (glass break detector) = 0.7 amps.

Now, to find the remaining current available for the motion detectors, we subtract the total current used by these components from the total current draw of the system:

1 amp (total current) - 0.7 amps (current used) = 0.3 amps.

If we have, for example, two motion detectors that collectively draw this remaining current, we would divide 0.3 amps by 2 to find the current draw of each motion detector. This means each motion detector would draw 0.15 amps.

Thus, the correct answer is that each motion detector draws