Physics P2 4.2 Electric circuits.

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What does every component in an electric circuit have?
Its own agreed circuit symbol.
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How are the circuit symbols used?
They are put together in a circuit diagram to show how the components are connected together in a circuit.
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What is the equation used in a circuit?
I = Q over t (look up).
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In the equation used in a circuit, what is I?
The current in amperes (A).
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In the equation used in a circuit, what is Q?
The charge in coulombs (C).
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In the equation used in a circuit, what is t?
The time in seconds (s).
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In an electric circuit, what is a cell and what does it do?
A cell is necessary to push electrons around a complete circuit, a battery consists of two or more cells.
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In an electric circuit, what is a switch and what does it do?
A switch enables the current in a circuit to be switched on or off.
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In an electric circuit, what is an indicator?
An indicator is designed to emit light as a signal when a current passes through it or as a light source such as a bulb.
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In an electric circuit, what is a diode?
A diode allows current through in one direction only.
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In an electric circuit, what is a light-emitting diode (LED)?
A light-emitting diode (LED) emits light when a current passes through it.
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In an electric circuit, what is an ammeter?
An ammeter is used to measure electric current.
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In an electric circuit, what is a fixed resistor?
A fixed resistor limits the current in a circuit.
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In an electric circuit, what is a variable resistor?
A variable resistor allows the current to be varied.
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In an electric circuit, what is fuse?
A fuse is designed to melt and therefore 'break' they circuit if the current through is greater than a certain amount.
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In an electric circuit, what is heater?
A heater is designed to transfer electrical energy to heat the surroundings.
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In an electric circuit, what is a voltmeter?
A voltmeter is used to measure potential difference (e.g. voltage).
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**MAKE SURE THAT YOU CAN RECOGNISE AND DRAW ALL OF THESE CIRCUIT SYMBOLS - YOU WILL NEED TO LOOK THEM ALL UP**
**USE A SHARP PENCIL AND MAKE SURE THERE ARE NO GAPS OR ODD ENDS OF WIRE SHOWN ON YOUR DIAGRAM**
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Other cards in this set

Card 2

Front

How are the circuit symbols used?

Back

They are put together in a circuit diagram to show how the components are connected together in a circuit.

Card 3

Front

What is the equation used in a circuit?

Card 4

Front

In the equation used in a circuit, what is I?

Card 5

Front

In the equation used in a circuit, what is Q?

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