Electric Current (HSC SSCE Physics): Flashcards

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Electric Current
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Electric current

Flow of charged particles through material

Current formula

I=qtI = \frac{q}{t}

Unit of current

Amperes (A)

One ampere equals

One coulomb per second (1 A=1 C s−11 \text{ A} = 1 \text{ C s}^{-1})

Current direction convention

Direction positive charges would move

Three conditions for current flow

Path, free charge carriers, applied force

Conductors

Materials allowing current to flow easily

Insulators

Materials that do not allow current to flow

Ammeter connection

In series

Free electrons in metals

Unbound electrons that can move throughout metal

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