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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is the relationship between resistance current and voltage? |
The current is directly proportional to the voltage and inversely proportional to the resistance |
Ohm’s law |
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What causes electrical resistance? |
The flowing of electrons colliding with positive atom nucleus’ |
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What fuse should a plug have? |
3A |
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What are the rules for a series circuit? |
The current is the same everywhere The pd is equal across each branch, equating to the power supply |
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What are the rules for a parallel circuit? |
The current divides through each branch The pd splits across the components, adding up to the power supply voltage |
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What affects the resistance of a wire? |
Material Length Temperature Cross section |
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What affects the resistance of an LDR? |
As light intensity increases so does the resistance |
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What does pd stand for?what |
Potential difference |
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What is the unit of power? |
Watt |
What is the unit of power? |
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What creates the current in a circuit? |
The flow of of electrons |
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What does non-Ohmic mean? |
The relationship, current and conductor relationship is non linear |
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How can an object become statically charged? |
An imbalance of positive and negative charges- transfer negative charges/electrons |
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What charge is a proton? |
+1 |
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What charge is a neutron? |
0 |
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What charge is an electron? |
-1 |
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What objects are affected by static? |
Insulators walls, polythene, wool |
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Why does the Van de Graaf Generator male hair stick up? |
When the generator starts charging it trended s charge to whoever’s touching it, their hair gets charged, repelling each other |
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What removed static charge? |
Give the static object some +- ions to balance their charge- neutralises it |
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What’s the symbol for a resistor? |
Back (Definition) |
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What is the symbol for a diode? |
Back (Definition) |
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What effects the resistance of a thermistor? |
The resistance decreases as the temperature increases |
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