Daily Practice · GCSE Science

Daily Practice - GCSE Science

26th May 1994

5 questions · GCSE · 584 questions in this band

1
Energy
A motor is supplied with 800 J of energy and wastes 240 J as heat. Calculate its efficiency as a percentage.
2
Energy Stores, Transfers and Calculations
Name four energy stores.
3
Efficiency, Power and Energy Resources
Why can no device be 100 percent efficient?
4
Electricity
A resistor of resistance 15 ohm is connected to a 6.0 V supply. Calculate the current flowing through it. Use V = I x R.
5
Circuits, Resistance and Components
What happens to the total resistance when a second resistor is added in parallel, and why?

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