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Physics > Current Electricity > Flashcards

Current Electricity Flashcards

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1
Q

Conductors

A

Substances which allow electric current to flow through them freely

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2
Q

Insulators

A

Substances which do not allow electric current to flow through them

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3
Q

Closed circuit

A

Needed for the current to flow, if there is a break in a circuit then the current won’t flow

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4
Q

Energy provided

A

By a battery or power pack, that is needed to move the current around the circuit

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5
Q

The battery pumps electrons

A

From its negative end around the circuit

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6
Q

The electrons are attracted

A

back to the positive end of the battery

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7
Q

Potential difference

A

The difference in electrical pressure between the positive and negative end of the battery/power pack

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8
Q

Whenever there is a potential difference

A

Electricity will flow

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9
Q

This potential difference is known as

A

Voltage and is measured in volts

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10
Q

Resistance

A

Is the opposition to the flow of electrons. The unit is the Ohm and it is measured using an ohmmeter

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11
Q

Resistor

A

If a resistor is placed in an electric circuit, it will slow down the flow of electrons

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12
Q

Main supply

A

The electricity in our homes, supplied by the ESB

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13
Q

Sockets

A

Are tapped off at points along this ring circuit

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14
Q

Fuse

A

A safety device that prevents the circuit from overheating

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15
Q

A circuit breaker

A

is used in the fuse board of the home, and this trips to stop the flow of current from entering the house

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16
Q

Circuit breaker

A

A circuit breaker is used in the fuse board of the home, and this trips, to stop the flow of current from entering the house.

17
Q

The watt (W)

A

The watt is the unit of electrical power.

18
Q

The ESB charges a fee for the number of…

A

Kilowatts (1000 watts) used per hour

19
Q

ESBs unit of electricity

A

ESB’s unit of electricity kilowatt hour (kWh)

20
Q

Kilowatt hour

A

Is the electrical energy used by a 1kW appliance running for 1 hour

21
Q

Electric current

A

Is a flow of electric charge

22
Q

Conductors

A

Substances which allow electric current to flow through them freely

23
Q

Insulators

A

Substances which do not allow electric current to flow through them

24
Q

Closed circuit

A

Needed for the current to flow, if there is a break in a circuit then the current won’t flow

25
Q

Energy provided

A

By a battery or power pack, that is needed to move the current around the circuit

26
Q

The battery pumps electrons

A

From its negative end around the circuit

27
Q

The electrons are attracted

A

back to the positive end of the battery

28
Q

Potential difference

A

The difference in electrical pressure between the positive and negative end of the battery/power pack

29
Q

Whenever there is a potential difference

A

Electricity will flow

30
Q

This potential difference is known as

A

Voltage and is measured in volts

31
Q

Resistance

A

Is the opposition to the flow of electrons. The unit is the Ohm and it is measured using an ohmmeter

32
Q

Resistor

A

If a resistor is placed in an electric circuit, it will slow down the flow of electrons

33
Q

Electric current

A

Is a flow of electric charge

Physics (9 decks)

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