Current, Voltage and Resistance

Current, Voltage and Resistance

StarterAnswer the following questions :1.What is current?2.What is it measured in?3.Copy and name the following components:

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Current, Voltage and Resistance

Current, Voltage and Resistance

We are learning to:

•Define the potential difference (voltage) across a component.•Develop our knowledge of symbols and circuit building and measuring the voltage across components and the current in the circuit.•Define and calculate the resistance of certain components.

13/04/23

Current, Voltage and Resistance

Current, Voltage and Resistance

Copy the following definitions:The Potential difference across a component is equal to the energy lost by the electrons in the component.

Potential difference is measured in volts (V)

Potential difference is measured using a voltmeter:

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V

Investigating resistance practical

A voltmeter measures the voltage across a component. It is plugged in parallel with the component: on top of the component.

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V

Current, Voltage and Resistance

Current, Voltage and Resistance

13/04/23

What you do now:

1. Copy the circuits from the boards and build them.2. For each circuits record the current and the potential

difference across each component: the battery, the bulb and the resistor.

3. What can you conclude about the energy given to the charges by the battery as they go through .

VA

IR V

(A)current x )( Resistance (V) difference Potential

Current, Voltage and Resistance

Current, Voltage and Resistance

Ohm’s LAW:The current through a resistor at constant temperature is directly proportional to the potential difference across the resistor.

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V

R I

Calculate the resistance for each component of your circuits