P6b Sharing
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Recognise the arrangement of how fixed resistors in a circuit can be used as a potential divider.
Describe and recognise that a potential divider is used to produce a required pd in a circuit.
Describe and recognise that a LDR responds to a change in light level.
Describe and recognise that a thermistor responds to changes in temperature.
Explain how two fixed resistors can be used as a potential divider.
Explain how one fixed resistor and one variable resistor in a potential divider allows variation of the output pd.
Describe how the resistance of an LDR varies with light level.
Describe how the resistance of a thermistor (ntc only) varies with temperature.
Calculate the output pd of a potential divider from the values of its resistors using:
Vout = Vin x R2 / (R1 + R2)
Explain how a variable resistor can be used in place of the fixed resistor to provide an output pd with an adjustable threshold.
Explain how an LDR or a thermistor can be used in a potential divider with a fixed resistor to provide an output signal which depends on light or temperature conditions.
Objectives:
stuff what is important goes hereContent 3Content 4Content 5Content 2
Prior Learning:
Difficult Concepts:
Outline:
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Homework:
Homework1
Objectives:
Content 1
Prior Learning:
Difficult Concepts:
Outline:
Suggested Practicals:
Extension Activities:
Homework:
Homework2 again