Physics

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  • Created by: 13aj
  • Created on: 09-04-17 20:20
The National Grid is the system of...that supply electrical energy to our...
power stations, cables, pylons and transformers. homes, schools, industries etc.
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Is getting our electrical energy from the National Grid reliable or unreliable?
reliable
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Transformers step up... the voltage, in order to... the current
increase. reduce
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power stations produce electricity at voltages typically around...
20,000V
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Large cables transmit(carry) the electricity across the...
country
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Large industrial sites produce the electricity at voltaces around...
11,000V
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Transformers step down the voltage to about 11,000V for...
large industrial sites
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Transformers step down the voltage to a safer... for use in homes
240V
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Transformers step up the voltage to around... for the large cables
400,000V
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Describe the typical set up for most power stations
The fuel is used to provide heat energy to water in boiler. The water changes to steam which turns he blades of a turbine. The turbine is conneceted to a generator which the produces electricity. Coal, oil and gas power stations work like this by
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Does a nuclear power station release CO
no
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Describe the typical set up for other types of generators, such as hydroelectric, tidal, wave, wind
Water or air strikes the blades of a turbine to make it turn. The turbine is connected to a generator which the produces electricity
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PV solar cells convert lighte energy... to electrical energy
directly
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Name 7 renewable resources
biomass, geothermal, solar, wind, waves, tidal, hydroelectric
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Name 4 non-renewable resources
coal, oil, gas and nucleur
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Nucleur have... building costs, running costs is..., decommissioning costs are..., their harm to the environment...socio-economic
High. Medium. Very high. Produces no CO , but radioactive waste produced. Creates many jobs for decades. Risk of terrism?
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Coal have... building costs, ... running costs,.... decommissioning costs, harming the environment by..., socio-economic...
low. Medium. Medium. Producing CO . Creates many jobs for decades.
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Wind have... building costs, ... running costs,.... decommissioning costs, harming the environment by..., socio-economic...
High. Very low. Low. Eye-sore? Few jobs created long-term.
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Hydro have... building costs, ... running costs,.... decommissioning costs, harming the environment by..., socio-economic...
High. Very low. Medium. Can affect wildlife and irrigation if dam placed in rivers. Creates many jobs decades.
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What is the equation for how much energy is transferred per second?
Power=Energy
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If the power of a kettle is 3000W, and it's on for 3 minutes, how many Joules of energy has it converted?
.
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Energy is measured in...
Joules (J)
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Power is measured in...
Watts (W)
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Time is measured in...
Seconds (s)
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In electric circuits, the equation for power is...
power=current
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If the poer of a hairdryer is 1.2kW, and it's working on "mains" power (voltage is 240V) what's the current flowing?
.
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Other cards in this set

Card 2

Front

Is getting our electrical energy from the National Grid reliable or unreliable?

Back

reliable

Card 3

Front

Transformers step up... the voltage, in order to... the current

Back

Preview of the front of card 3

Card 4

Front

power stations produce electricity at voltages typically around...

Back

Preview of the front of card 4

Card 5

Front

Large cables transmit(carry) the electricity across the...

Back

Preview of the front of card 5
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