Question

An electrical circuit for a set of 4 lights depends on a system of switches A, B, C and D. When these
58.
switches work they have the following effect on the lights: They each change the state of two lights (ie. on
becomes off and off becomes on). The lights that each switch controls are as follows.
A BIC D
1 and 22 and 4 1 and 33 and 4
= ON
= OFF
Podoveda
In configuration 1 shown below, switches CBDA are activated in turn, resulting in configuration 2. One switch
did not work and had no effect at all. Which was that switch?
be one
ordenar por
3
O
one
che
4o
configuration 1
configuration 2 no ano
(A)A
(B) B
(C) C
aga (DD​

Answer 1

Answer:

and is A) 1 and 2

I hope it will help you