An LED indicator circuit is connected to the output of a logic gate. The potential difference across the blue LED is 3.2 V when it is lit. The current through the LED must not exceed 16 mA. All logic gate outputs are: logic low = 0 V, logic high = 12.0 V. A student suggests using a resistor of nominal resistance 560 Ω with a tolerance of ±5% \pm 5\%\,±5% in series with the LED. Deduce whether the student's suggestion is suitable.
37 exam-style questions on AQA A Level Physics Current electricity, covering Basics of electricity, Current-voltage characteristics, Resistivity, Circuits, Potential divider, and Electromotive force and internal resistance. Each one has a worked solution and a mark scheme showing where the marks go.