The document discusses measuring voltage in electrical circuits. It explains that voltage is measured using a voltmeter connected across or in parallel with a circuit component. It provides instructions for setting up simple circuits and measuring the supply voltage and voltages across individual resistors. It finds that in a parallel circuit, the total voltage across all components equals the supply voltage, but the voltage across each individual component decreases compared to a single component circuit.

1. A V component here R Voltage is measured by connecting the voltmeter across (or in parallel with ) the component. Voltage is measured in volts and the symbol for this is V. V Components Measuring voltage - across a resistance or a bulb

2. 1. Set up the circuit as shown above. Connect the voltmeter across the power supply and measure the supply voltage. 3. Then connect the voltmeter across the resistance (R) and measure this voltage. Experiment: measuring voltage R V V Circuit 1

3. Add another resistance ( R 2 ) to the circuit as shown. Connect the voltmeter across the power supply and measure the supply voltage. Then measure the voltage across each of the resistances. R 1 R 2 V V 1 V 2 Circuit 2 Experiment: measuring voltage

4. Record your results: Circuit 1 : Voltage (supply) = V Voltage (R 1 ) = V Circuit 2 : Voltage (supply) = V Voltage (R 1 ) = V Voltage (R 2 ) = V R 1 R 2 V V 1 V 2 R 1 V V Circuit 1 Circuit2

5. The current is the ____ of electricity around the circuit. The _______ is the amount of push. When two components were put into Circuit 2, the voltage of the supply was the ____ as Circuit 1. However, the voltage across R1 ________ . The voltage across both components in circuit 2 added to be equal to the _____ voltage. supply, decreased, voltage, flow, same Circuit2 Circuit2 R 1 R 2 V V 1 V 2 R 1 V V Circuit 1

6. Measuring voltage in parallel circuits Connect together the circuit shown above and measure, in turn, the voltage at V 1 , V 2 and V 3. V 1 V 2 V 3

7. Write down your results in the table below : Explain anything you notice about the results. V 3 V 2 V 1 Voltage (V) Voltmeter

8. Parallel and series circuits