9. four
11. (Continued)
Switch A or switch B may be either open or closed (O or 1
10. both
position). The series circuit will provide an output only if both A
switches
closed
and B are closed; i.e., equal to 1. If either switch A or switch B
is open (i.e., equal to 0), then the circuit will not provide an
output. The Boolean expression representing this switching
circuit is AB.
Assuming there is a complete circuit for each of the following
switching circuits, the Boolean expressions representing the
output would be
IT 0346
1-8
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