Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
3rd February 2023
- 1Efficiency, Power and Energy Resources
Give the equation for efficiency in terms of energy.
- 2Electricity
A component has a current of 5.0 A and a resistance of 8.0 ohm. Calculate the power dissipated using P = I^2 x R.
- 3Circuits, Resistance and Components
Two 4 ohm resistors are connected in series. Calculate the total resistance.
- 4Mains Electricity, Power and Energy
Why is the live wire dangerous even when a device is switched off?
- 5Particle Model of Matter
A block has a volume of 50 cm^3 and a mass of 135 g. Calculate its density.
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