Electric Current and Electric Charge (Leaving Cert Physics): Flashcards

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Electric Current and Electric Charge
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Electric charge

Fundamental property of matter in atoms

Charge type of protons

Positive electric charge

Charge type of electrons

Negative electric charge

SI unit of electric charge

Coulomb (C)

Charge of one electron in coulombs

1.6×10−191.6 \times 10^{-19} C

Electrical conductors

Materials that allow charge to flow easily

Electrical insulators

Materials that don't allow charge to flow easily

Three effects of electric current

Heating, magnetic, and chemical effects

Heating effect of current

Heat energy produced in conductor

Magnetic effect of current

Magnetic field created around conductor

Chemical effect of current

Electrolysis - chemical reactions in solutions

Formula for electric current

I=QtI = \frac{Q}{t}

SI unit of current, definition

Ampere (A): 1 coulomb per second

Direction of conventional current

From positive terminal to negative terminal

How to connect ammeter in circuit

In series with the component

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