Electricity Lesson 8 Measuring Voltage in Parallel Circuits

Learning Intention By the end of this lesson I will Deepen my knowledge of

Starter Questions 1. John built the circuit shown to the right. What mistake has

Starter Answers 1. John built the circuit shown to the right. What mistake has

Activity 1: Voltage in Parallel circuits HINT: It is easier What you need: to

Activity 1: Voltage in Parallel circuits Voltmeter Voltage (V) 1 2 3 From the

Plenary Questions • State what the missing values should be in the following circuits.

Summary • Voltage in a parallel circuit is the same at every point.

Remember! • In a series circuit CURRENT IS THE SAME, VOLTAGE DIFFERENT • In

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Electricity Lesson 8 Measuring Voltage in Parallel Circuits

Learning Intention By the end of this lesson I will Deepen my knowledge of measuring voltage Success Criteria • Construct an electrical circuit and accurately measure voltage in a parallel circuit. • Describe how voltage behaves in a parallel circuit • Interpret circuit diagrams to solve problems involving voltage.

Starter Questions 1. John built the circuit shown to the right. What mistake has John made? 2. State what the missing values should be in the following circuits. A V B

Starter Answers 1. John built the circuit shown to the right. What mistake has John made? In a series circuit, the voltage across the components adds up to the voltage from the battery. V 2. State what the missing values should be in the following circuits. B A V 1 = 4 V V 2 = 3 V

Activity 1: Voltage in Parallel circuits HINT: It is easier What you need: to build the circuit • 2 batteries, 2 bulbs, 5 wires and a voltmeter first and then add the voltmeter! What to do: • Measure the voltage at three different positions by connecting the voltmeter as shown in the circuit diagrams below:

Voltage in Parallel circuits

Activity 1: Voltage in Parallel circuits Voltmeter Voltage (V) 1 2 3 From the table, what can you say about the voltage at different positions in a parallel circuit? In a parallel circuit, the voltage in the branches is the same as the voltage from the battery

Plenary Questions • State what the missing values should be in the following circuits. V 1 = ? V 2 = ? V 3 = ? V 4 = ?

Plenary Questions • State what the missing values should be in the following circuits. V 1 = 1. 5 V V 2 = 2 V V 3 = 4 V

Summary • Voltage in a parallel circuit is the same at every point.

Remember! • In a series circuit CURRENT IS THE SAME, VOLTAGE DIFFERENT • In a parallel circuit CURRENT IS DIFFERENT, VOLTAGE THE SAME