Circuits introduction questions functions of symbols

Question 1

What is a switch used for in a circuit

Answer 1

A switch used to turn a circuit on (closed) and off (open).

Question 2

What is a variable resistor used for in a circuit

Answer 2

A resistor restricts or limits the flow of electrical current.

A fixed resistor has a resistance that does not change.

Question 3

What is a cell used for in a circuit

Answer 3

A circuit has to have a power source and that is often a cell.

Question 4

What is a battery used for in a circuit

Answer 4

A battery is a power source made from more than one cell.

Question 5

What is a light bulb used for in a circuit

Answer 5

In a light bulb electrical energy is converted into light energy and heat energy.

Question 6

What is a buzzer used for in a circuit

Answer 6

Buzzers are often used to alert a user to something.

Question 7

What is a motor used for in a circuit

Answer 7

This is a device that spins when current flows through it.

Question 8

What is a dynamo used for in a circuit

Answer 8

This is a type of electrical generator, often turned by hand, that can replace a battery in a circuit.