9.1 Parallel circuits

• Physics
• Secondary Education
• Age 13

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Parallel

circuits

a) know about the different types of electric circuits.

b) be able to show how current, voltage, and resistance are affected by the changes made to the electric circuit.

c) understand why schools and houses use parallel circuits more than series connections.

We are learning to:

October 14, 2025

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Starter

Series or Parallel

We are learning to know about the different types of electric circuits.

Series or Parallel?

1. series
2. parallel

Series or Parallel?

1. series
2. parallel

Series or Parallel?

1. series
2. parallel

Series or Parallel?

1. series
2. parallel

Series or Parallel?

1. series
2. parallel

Series or Parallel?

1. series
2. parallel

Series or Parallel?

1. series
2. parallel

Series or Parallel?

1. series
2. parallel

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What is an electric circuit?

Electric circuits are closed loops, forming a network of electrical components through which electrons can flow. 

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Components in series

Components in parallel

Give ONE difference between series and parallel circuits.

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Current in parallel circuits

We are learning to be able to show how current, voltage, and resistance are affected by the changes made to the electric circuit.

Sound

Current in parallel circuits

We are learning to be able to show how current, voltage, and resistance are affected by the changes made to the electric circuit.

Sound

Current in parallel circuits

branch

We are learning to be able to show how current, voltage, and resistance are affected by the changes made to the electric circuit.

Sound

Current in parallel circuits

We are learning to be able to show how current, voltage, and resistance are affected by the changes made to the electric circuit.

Sound

Current in parallel circuits

We are learning to be able to show how current, voltage, and resistance are affected by the changes made to the electric circuit.

Sound

The current through the cell is equal to the TOTAL of the current in all the branches.

We are learning to be able to show how current, voltage, and resistance are affected by the changes made to the electric circuit.

Rule for parallel circuits - Current

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Rule for parallel circuits - Current

The current through the cell is equal to the TOTAL of the current in all the branches.

We are learning to be able to show how current, voltage, and resistance are affected by the changes made to the electric circuit.

Why do we need an "ammeter" 

in a circuit?

Which of the following is NOT an advantage of connecting four lamps in parallel rather than in series?

1. Each component can be switched on and off separately.
2. A broken branch will not affect the other branches.
3. One component depends on the other.

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Practice

Current in parallel circuits

We are learning to be able to show how current, voltage, and resistance are affected by the changes made to the electric circuit.

Sound

Parallel

circuits

a) know about the different types of electric circuits.

b) be able to show how current, voltage, and resistance are affected by the changes made to the electric circuit.

c) understand why schools and houses use parallel circuits more than series connections.

We are learning to:

October 14, 2025