Look at the circuit shown in Figure A-1. If you want to stop the current flow through Device 3 in....?

Question

Look at the circuit shown in Figure A-1. If you want to stop the current flow through Device 3 in the circuit, which one of the following single switches should you open?

A. Switch S2

B. Switch S3

C. Switch S4

D. Switch S5

<a href="http://s242.photobucket.com/albums... target="_blank"><img src="http://i242.photobucket.com/albums/... border="0" alt="figure a-1"></a>

Answer 1

i think A.switch s2 but im not that sure.