Question Video: Identifying the Function of a Switch in a Circuit | Nagwa Question Video: Identifying the Function of a Switch in a Circuit | Nagwa

Question Video: Identifying the Function of a Switch in a Circuit Science

Fill in the blank: When a switch is _, electricity flows, turning components on.

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Video Transcript

Fill in the blank. When a switch is what, electricity flows, turning components on.

To answer this question, let’s look at a simple circuit. Our simple circuit has a bulb, a cell, a switch, and wires to connect these components together.

Now, let’s think about the function of a switch. A switch is used to turn a circuit on and off. A switch can either be open, like it is here, or closed, like it is here. When the switch is open, it creates a gap in the circuit. The gap in the circuit means that electricity cannot flow around the circuit, so the circuit is off and the bulb will not light up. When the switch is closed, the gap in the circuit is also closed, which creates a complete circuit. When a circuit is complete, the electricity has a complete path to flow round, so the circuit is on and the bulb lights up.

So, the correct answer is closed. When a switch is closed, electricity flows, turning components on.

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