Electrical charge and current: Electricity: Physics: GCSE (9:1)
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13 Terms
Charge
A property of something which experiences a force when placed in an electric field
Electrons
Negatively charged particles that transfer energy through wires
Current
The rate of flow of electric charge (electrons) around a circuit
Ammeter
A device used to measure current through a component (must be placed in series with that component)
Direct current (dc)
An electric current which flows consistently in one direction around a circuit
Alternating current (ac)
An electric current that continually reverses direction and changes size
Q = It
The equation linking charge flow, current and time
Q
The symbol for charge flow
I
The symbol for current
t
The symbol for time
Amps/amperes (A)
The SI unit for current
Coulombs (C)
The SI unit for charge flow
Seconds (s)
The SI unit for time
Note 
Flashcards (47)