Past paper questions for the DC Circuits topic of A-Level AQA Physics.

13.1 Circuit rules: Current rules: At any junction in a circuit, the total current leaving the junction = total current entering the junction. The junction rule holds because the rates of charge flowing in and out of a junction are always equal. Charge entering the junction = …

AQA worksheet and problems for the Physics A level course. Exam style questions for AQA Physics.

2024年11月17日 · Revision notes on Series & Parallel Circuits for the AQA A Level Physics syllabus, written by the Physics experts at Save My Exams.

Three resistors of resistance 2 Ω, 3 Ω and 4 Ω respectively are used to make the combinations X, Y and Z shown in the diagrams. List the combinations in order of increasing resistance. Referring to the circuit drawn, determine the value of I 1, I and R, the combined resistance in the circuit.

This section is about understanding the p.d. and current in any part of any circuit. It involves the logical application of rules and problem solving more complex circuits. 1. The sum of the currents flowing into any junction is equal to the sum of the currents flowing out.

Conservation of charge and conservation of energy in dc circuits. Students can construct circuits with various component configurations and measure currents and potential differences. The potential divider used to supply constant or variable potential difference from a power supply.

2024年3月9日 · State two advantages of a potential divider over a variable resistor and an disadadvantage of a variable resistor? There will always be some current. Explain how resistance heating occurs?

Current in parallel circuits splits up like a river's current. The total current arriving at a junction is equal to the total current leaving a junction. The current labelled is conventional current (positive to negative). For electrical parallel circuits, this results in the familiar "current splits up" rule.