Do now! Can you spell the following words correctly in your book please? Elektricity, elektorns, curent, ameter, volttmeter He’s going to blow! Be careful.

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Presentation transcript:

Do now! Can you spell the following words correctly in your book please? Elektricity, elektorns, curent, ameter, volttmeter He’s going to blow! Be careful Good Neutral Excellent MOODOMETER

Today’s lesson We’re going to look at how voltage changes in series and parallel circuits. We will also discuss what resistance is and how to calculate it.

☺ ☺ ☺ ☺ ☺ ☺ ☺ energy electron ☺ ☺ ☺ ☺

Series circuits The voltage of the cell is shared by the lamps 3V 1.5V

Series circuits The voltage of the cell is shared by the lamps 3V 1.5V Can you copy this please?

☺ ☺ ☺ ☺ ☺ ☺ ☺ energy electron ☺ ☺ ☺ ☺

Parallel circuits The voltage across each lamp is equal to the voltage across the cell 2.4 V

Parallel circuits The voltage across each lamp is equal to the voltage across the cell 2.4 V Can you copy this please?

☺ ☺ ☺ ☺ ☺ ☺ ☺ energy electron ☺ ☺ ☺ ☺

Resistance Measures how difficult it is for current to flow. Measured in Ohms (Ω) VA Resistance = voltage ÷ current

Can you measure the resistance of a lamp? Build this circuit and use it to find the resistance of the lamp. Design a results table to show your measurements. VA Resistance = voltage ÷ current

Let’s try a harder example!