A photo-interrupter sensor performs a function similar to a:
A.
switch.
B.
solenoid.
C.
diode.
D.
relay.
A photo-interrupter sensor performs a function similar to a:
A photo-interrupter sensor performs a function similar to a:
A photo-interrupter sensor performs a function similar to a:
A photo-interrupter sensor performs a function similar to a:
A.
switch.
B.
solenoid.
C.
diode.
D.
relay.