AQA GCSE · Combined Science: Trilogy 8464
2 multiple-choice questions marked as you go, and 4 written questions with worked solutions. All on Electricity.
Two resistors are connected in series. Resistor A has a resistance of \( 15 \text{ } \Omega \). If the total resistance of the circuit is \( 40 \text{ } \Omega \) and the potential difference across the power supply is \( 12 \text{ V} \), calculate the potential difference across Resistor B.
An electrical resistor has a resistance of \( 5 \text{ } \Omega \). When it is in use, it has a power output of \( 80 \text{ W} \).
Calculate the current flowing through the resistor.
Use the equation: \( \text{power} = (\text{current})^2 \times \text{resistance} \)
A current of \( 0.4 \text{ A} \) flows through a bulb for \( 30 \text{ seconds} \).
Calculate the charge flow through the bulb.
Write your answer out first, then check it against the worked solution.
Explain why step-up transformers are used in the National Grid between power stations and transmission cables.
Write your answer out first, then check it against the worked solution.
A resistor has a potential difference of \( 6.0 \text{ V} \) across it and transfers \( 180 \text{ J} \) of energy in \( 1 \text{ minute} \).
Calculate the resistance of the resistor.
Write your answer out first, then check it against the worked solution.
Household appliances in the UK are connected to the mains electricity supply using three-core cables.
a) State the color of the insulation used for the following wires:
i) The live wire.
ii) The earth wire.
b) The UK mains electricity supply has a potential difference of \( 230 \text{ V} \). Calculate the energy transferred to a device when a total charge of \( 30 \text{ C} \) flows through it.
Use the equation: \( \text{energy transferred} = \text{charge flow} \times \text{potential difference} \)
Write your answer out first, then check it against the worked solution.
* The content provided by thinka is generated by AI and may not always be accurate or up-to-date. Please use it as a supplementary resource and verify with official materials.
This page can show you how a good answer looks. It cannot tell you what your answer was missing. thinka marks your written work against the real mark scheme in about 15 seconds.
Want more questions like these? Get a fresh set on this topic, marked as you go.
Practise More