1
Q
Energy Transferred (J)
A
Energy Transferred (J) = Potential Difference (V) x Charge (C)
2
Q
Current in a series circuit
A
The same everywhere
3
Q
Ammeter
A
Measures current
Connected in series
4
Q
Voltmeter
A
Measures P.d
Connected in parallel to the component
5
Q
Readings on all voltmeters across components will equal the readings across the battery
A
Vs = V1 + V2
6
Q
Current in all loops of a parallel adds up to the current near the battery
A
A1 = A4 = A2 + A3
7
Q
Ohms law
A
Current is proportional to the potential difference if the temperature does not change
8
Q
Variable resistors
A
Change the amount of wire the current flows through e.g. dimmer switch
OCR GCSE PHYSICS
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