Science - Physics - Circuits

Question 0

What joins the components in a circuit?

Answer 0

Wires

Question 1

Name the 2 types of circuit that we can make.

Answer 1

Series
And
Parallel

Question 2

Describe a series circuit.

Answer 2

It has no branches.
The more lamps added the dimmer each lamp will glow.
Everything in the circuit must be connected and working or the current will be broken and nothing in the circuit will work.
Use less wiring than parallel circuits.
Can be used to test if a bulb or component is working.

Question 3

Describe a parallel circuit.

Answer 3

It has branches.
If more lamps are added, the lamps glow as brightly as they did before the addition.
If a lamp breaks or a component is disconnected in 1 branch the components in other branches will continue to work.
Our homes are wired up in parallel circuits.

Question 4

How do we measure current in a circuit and how should it be connected?

Answer 4

An ammeter in series.

Question 5

How do we measure voltage in a circuit and how should it be connected?

Answer 5

A voltmeter across the component in parallel.

Question 6

What is a conductor? Give a few examples.

Answer 6

A material that conducts electricity well. E.g. Metal (steel, iron, grafite)

Question 7

What is an insulator? Give a few examples.

Answer 7

A material which doesn’t conduct electricity well. E.g. Plastic, rubber, glass, paper, Teflon.

Question 8

Draw the following symbols:
Switch
Cell
Battery
Lamp
Voltmeter
Ammeter
Resistor
Variable resistor
Motor

Answer 8

Check your book!