Electrical Component Characteristics

Tick the two things that are needed for an electrical charge to flow

• Source of potential difference

• Closed/Complete Circuit

• Wire

• Electricity

• Battery

What is the reading on the labelled voltmeter?

When does electricty demand increase (tick 3)?

• People come home from school / work

• People wake up in the morning

• People go to bed

• Popular events

• Dinner Time

What symbol?

• battery

• lamp

• fuse

• resistor

• ammeter

What component does this graph represent?

• Diode

• Ohmic conductor

• Filament lamp

• Battery

Link the component being tested with the graph of results expected

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Which graph represents an ohmic conductor?

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Link the component being tested with the graph of results expected

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L.E.D is the abbreviated name for which component?

• Light Emitting Diode

• Low Energy Diode

• Light Energy Diode

• Light Extending Diode

Total energy = 200J
Useful energy = 20J

Workout the efficiency of this lightbulb.
 $efficiency\ =\ \frac{useful\ enegy}{total\ energy\ in}\ \times100$  

• 100%

• 80%

• 40%

• 10%