Electrical charge and current: Electricity: Physics: GCSE (9:1)

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13 Terms

1
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Charge

A property of something which experiences a force when placed in an electric field

<p>A property of something which experiences a force when placed in an electric field</p>
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Electrons

Negatively charged particles that transfer energy through wires

<p>Negatively charged particles that transfer energy through wires</p>
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Current

The rate of flow of electric charge (electrons) around a circuit

<p>The rate of flow of electric charge (electrons) around a circuit</p>
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Ammeter

A device used to measure current through a component (must be placed in series with that component)

<p>A device used to measure current through a component (must be placed in series with that component)</p>
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Direct current (dc)

An electric current which flows consistently in one direction around a circuit

<p>An electric current which flows consistently in one direction around a circuit</p>
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Alternating current (ac)

An electric current that continually reverses direction and changes size

<p>An electric current that continually reverses direction and changes size</p>
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Q = It

The equation linking charge flow, current and time

<p>The equation linking charge flow, current and time</p>
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Q

The symbol for charge flow

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I

The symbol for current

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t

The symbol for time

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Amps/amperes (A)

The SI unit for current

<p>The SI unit for current</p>
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Coulombs (C)

The SI unit for charge flow

<p>The SI unit for charge flow</p>
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Seconds (s)

The SI unit for time

<p>The SI unit for time</p>