TSR Wiki > Study Help > Subjects and Revision > Revision Notes > Physics > Electrical Definitions
Charge
- Charge is conserved, measured in coulombs (1 amp second).
- Charge of an electron = -1.6 x 10-19 C
- No. of electrons that carry 1 C = 6.25 x 1018
- Charge = the area under an I-T graph.
- 1 coulomb is the quantity of charge that passes a point in a second when the current flowing through is 1amp.
Current
- Current is the rate of flow of charge. Measured in Amps.
current, 
charge, 
time
Power
- Power is the rate of energy transfer. Measured in Watts (W).
power, 
voltage, 
current
Parallel
In parallel, the voltage across each branch of the circuit is the same because the branches are connected to the same two points.
Series
In a series circuit, the current is the same through all the components.
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