Question

5. There are three lights (1,
2,3) in the first floor and
three switches(A,B,C) in the
ground floor. The three lights
are not visible from
downstairs. In order to label
the switches you are allowed
only one trip upstairs. What
will you check to label the
switches without opening
the wiring?​

Answer 1

Step-by-step explanation:

There are three lights (1,

2,3) in the first floor and

three switches(A,B,C) in the

ground floor. The three lights

are not visible from

downstairs. In order to label

the switches you are allowed

only one trip upstairs. What

will you check to label the

switches without opening

the wiring?

switches

A B C

I will turn on A

i will turn on B

i will keep C off

then i will turn off A

and go to upstair.

now light which is on is connected to switch B.

now i will touch the lights which are off

the one which is slight hot

is connected to switch A

and remaining light connected to switch C