# GCSE Physics - Electricity Recall

Flashcards by megfindley, updated more than 1 year ago
 Created by megfindley over 5 years ago
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### Description

GCSE Physics - Electricity (Includes; questions, answers & pictures)

## Resource summary

 Question Answer What happens when insulating materials are rubbed against each other? They become electrically charged. What particle is rubbed off between each insulating material when they are rubbed together? Electrons. (which have negative charges) How does one of the insulating materials become negatively charged? It gains electrons. (from the other insulating material) How does one of the insulating materials become positively charged? It loses electrons. (to the other insulating material) If two electrically charged materials, which carry the same charge, are brought near to each other what will happen? They will repel each other. If two electrically charged materials, which carry different charges, are brought near to each other what will happen? They will attract each other. What is electric current? The flow of electric charge. What does this circuit symbol represent? Open switch. What does this circuit symbol represent? Closed switch. What does this circuit symbol represent? Lamp. What does this circuit symbol represent? Fuse. What does this circuit symbol represent? Cell. What does this circuit symbol represent? Battery. What does this circuit symbol represent? Resistor. What does this circuit symbol represent? Voltmeter. What does this circuit symbol represent? Ammeter. What does this circuit symbol represent? Light dependant resistor. (LDR) What does this circuit symbol represent? Thermistor. What does this circuit symbol represent? Variable resistor. What does this circuit symbol represent? Diode. Which component does this current-potential difference graph represent and why? A filament bulb because the graph shows that the resistance of the filament bulb increases as the temperature of the bulb increases. What component does this graph represent and why? A diode, because it shows current only flowing in one direction, the diode has a very high resistance in the reverse direction. What are mains electricity cables made from and why? The outside layer is made from plastic because it is a good, flexible insulator. The two or three wires inside are made from copper as they are good conductors. What colour is the neutral wire? Blue. What colour is the Earth wire? Green and yellow stripes. What colour is the live wire? Brown. What is direct current (d.c.)? Current that always passes in the same direction. What is alternating current (a.c.)? Current which is constantly changing direction. What is the frequency and potential difference of mains electricity? 50 hertz and 230 V. (approx)

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