Student responses to functions associated with valve and switch.
| Valve | Function |
| Type 1 | Controls whether current(water) flows or does not flow (disconnect, connect, turn off and on) Allows water or electric current to flow Open and close the conductor Blocks the flow of water(current) Control the flow of current Bulb control It is located between conductors and breaks between them Electric movement |
| Type 2 | To prevent excessive flow of electricity Becomes a passage for flow Causes electric current to move Control of electricity supply |