P6f Charging
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Recognise and draw the symbol for a diode.
State that a diode only allows a current to pass in one direction.
State the direction of current flow from the diode symbol.
Recognise half-wave rectification from a voltage – time graph.
Recognise full-wave rectification from a voltage – time graph.
Recognise and draw the symbol for a capacitor. State that a capacitor stores charge which can be discharged later.
Recognise the current – voltage characteristics for a silicon diode.
Use this graph to explain that a diode only allows current to flow in one direction.
State and recognise that a single diode produces half-wave rectification.
Describe how four diodes can be used in the construction of a bridge circuit to obtain full-wave rectification.
Describe that when a current flows in a circuit containing an uncharged capacitor, charge is stored and the pd across the capacitor increases.
Describe the flow of current from a charged capacitor when a conductor is connected across it. State that many devices need a more constant voltage supply.
State and recognise that a capacitor will produce a more constant (smoothed) output.
Explain the current voltage graph for a silicon diode in terms of high and low resistance in reverse and forward directions.
Describe the action of a silicon diode in terms of the movement of holes and electrons.
Explain how four diodes in a bridge circuit produce full-wave rectification.
Explain the flow of current and reduction in pd across a capacitor when a conductor is connected across it.
Explain the action of a capacitor in a simple smoothing circuit.
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