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P3 (Circuits (Current (Electron flows from positive to negative, charge…
P3
Circuits
Current
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In series, the current is same around circuit
In parallel, current is divided among branches
Potential difference
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In series, p.d. is shared among components (ratio with resistance)
In parallel, p.d. is same across each branch
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Graphs
Lamp
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Ions vibrate more, more collisions with electrons
Current increases with p.d., but at slower rate
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Fixed resistor
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Resistance is constant, straight line
Electrostatics
Static
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Acetate rod loses electrons, becomes positive
Polythene rod gains electrons, becomes negative
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