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Electric fields in circuits
Electrons move round a circuit due to the force exerted on them by an electric field that is
set up within the conduction material.
However when there is a gap in the circuit, the electrons may be able to feel the force of
the electric…

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The time constant tells you how long it takes
for the current to fall to 37% that of it's starting
Charging the capacitor gives similar curves.

Discharging capacitor maths
The graphs above have a constantly changing
gradient which in itself does not change at a constant rate. They are…


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