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If we have a wire carring a current I, then the total amount of charge will depend on I and T
The unit of current: Ampere (A)
(The current when one coulomb of charge flows each second)
The amount of energy supplied to each unit of charge is called the electromotive force! (emf)
Potential difference has the same units as 'emf', and the definition of P.D,V, As work done:
Resistance, if we know the current and P.d, can be calculated:
Resistance is measured in ohms. The symbol for an ohm looks like this: Ω
Resistance of a conductor:
Required:
Length (L), Cross-sectional area (A),
resistivity(p)
Power and work in electric circuits:
