Which statement describes a switch in an electrical circuit?
A. It is made of insulating material so that charge cannot flow
through it when it is open.
B. It is made of conducting material so that charge can flow through
it when it is closed.
C. It is made of insulating material so that charge cannot flow
through it when it is closed.
D. It is made of conducting material so that charge can flow through
it when it is open.