a) The picture shows a wind-powered generator used to produce electricity for a house - Edexcel - GCSE Physics - Question 3 - 2015 - Paper 1
Question 3
a) The picture shows a wind-powered generator used to produce electricity for a house.
(i) The table shows some electrical components.
Put ticks in the table next t... show full transcript
Worked Solution & Example Answer:a) The picture shows a wind-powered generator used to produce electricity for a house - Edexcel - GCSE Physics - Question 3 - 2015 - Paper 1
Step 1
Put ticks in the table next to the two components the generator must contain.
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Answer
component
√
ammeter
✓
coil of wire
✓
battery
magnet
voltmeter
Step 2
Calculate how much it would cost to buy the same amount of energy from the National Grid.
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Answer
The generator produces energy at a maximum power of 2.0 kW for 3 hours, which can be calculated as follows:
I = rac{2500}{230} ext{ A} \
I ext{ ≈ } 10.87 ext{ A}
Step 4
Suggest why a 2 kW wind-powered generator may not supply all the electrical energy needed in a house.
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Answer
A 2 kW wind-powered generator may not supply all the energy needed due to:
Variability in wind speeds, leading to inconsistent energy generation.
Higher power appliances that may exceed the generator's capacity (often above 2 kW), requiring more than one generator or concurrent usage of multiple appliances.
