When the normally open pushbutton is pressed, it causes a low to be produced at the input of a(n) ____.
A) diac
B) triac
C) inverter
D) transformer

Question

Quizplus · Accepted Answer

A normally open pushbutton, when pressed, completes a circuit. If this action is meant to produce a low signal at the input of a device, an inverter is the correct choice. An inverter flips the input signal, so a high (from the unpressed state due to pull-up resistor, for example) becomes a low when the button is pressed and the circuit is completed. Diacs and triacs are used for alternating current (AC) switching, and transformers are used to change the voltage levels, not to invert signals.

When the Normally Open Pushbutton Is Pressed, It Causes a Low