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This section covers key concepts in energy transfer, the behavior of electricity, and the principles of radiation. Students should understand the implications of using renewable energy, the calculations related to specif…
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Calculate the time taken to fully charge a laptop battery when in use, given the potential difference and current.
2.5 hours.
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Describe the method used to measure the specific heat capacity of aluminium.
Measure mass, use an electric heater, record temperature change, and calculate c.
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Discuss the environmental impacts of renewable energy resources.
Can cause habitat destruction, noise pollution, and visual pollution.
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How can the efficiency of an energy storage system be determined?
Measure input and output energy, then calculate efficiency.
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Explain the difference between alternating current (a.c.) and direct current (d.c.).
a.c. changes direction, while d.c. flows in one direction.
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Explain why the sample containing gold-198 is left in the patient after treatment.
Gold-198 has a short half-life, reducing radiation risk over time.
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What is the maximum power rating suitable for a circuit with a maximum current of 0.012 A and resistance of 2.2 kΩ?
0.3168 W
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What types of radiation are emitted by unstable nuclei?
Alpha particles, beta particles, and gamma rays.
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What happens to the chemical energy store of a fossil fuel when it is burned in a car engine?
It decreases.
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What is a fuel produced using plants called?
Biofuel or ethanol.
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What are the two types of cars that do not burn fossil fuels?
Electric cars and hydrogen fuel cells.
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State one reason why the UK plans to stop burning fossil fuels to generate electricity.
To reduce environmental impact.
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What is the formula for specific heat capacity?
c = Q / (m × ΔT)
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How do you calculate the resistance of a resistor using Ohm's Law?
R = V / I
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MCQ: What is the unit of power?
Watt
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