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Physics > Static Electricity and current > Flashcards

Static Electricity and current Flashcards

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1
Q

polythene rods

A

Gains electrons

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2
Q

Perspex

A

Loses electrons

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3
Q

Earthing

A

Occurs when a charged object loses it’s charge to the earth through a conductor

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4
Q

Static electricity

A

S a build up of electric charge that can occur on good insulators e.g. Polythene and perspex rods

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5
Q

Ohms law

A

Ohms law states that voltage is directly proportional to current

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6
Q

DC

A

Direct current goes in one direction only eg. The current from a battery

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7
Q

AC

A

Alternating current changes very quickly many times a second

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8
Q

Main supply

A
  • the main supply (the electricity in our homes, supplied by the ESB) is A.C
  • it flows at a potential difference of 230 Volts
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9
Q

The ring circuit

A

All households have a ring circuit made of live, neutral and earth wires. Sockets are tapped off at points along this ring circuit

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10
Q

Fuse

A

Is a safety device that prevents the circuit from overheating, it will melt when it is too hot, breaking the circuit

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11
Q

Circuit breaker

A

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

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12
Q

Live wire

A

Is brown and carries most electricity it is connected to the plugs fuse on the right hand side

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13
Q

Neutral wire

A

Is blue and is connected to the left hand side

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14
Q

Watt

A

Is the unit of electrical power

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15
Q

The ESB charges a fee for the number of

A

Kilowatts (1000 watts) used per hour

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16
Q

ESBs unit of electricity

A

Is the kilowatt hour (kWh)

17
Q

A kilowatt hour

A

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

18
Q

Heating effect

A

Boil water in a kettle, immersion heater, electric cooker, fuse in plug

19
Q

Chemical effect

A

Electroplating cheap metal with more expensive metal e.g. Silver, electrolysis(splitting) of water, mobile phone battery

Physics (9 decks)

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