O-LevelPhysicsElectricityOct/Nov 2024Paper 3 Q210 Marks
In this experiment you will investigate how the resistance of a light-emitting diode (LED) changes with different currents. You are provided with: • a power source • a switch • a voltmeter with two leads that may be connected between different points in the circuit shown in Fig. 2.1 • a light-emitting diode (LED) • a 270Ω resistor, a 470 Ω resistor and a 560 Ω resistor • sufficient connecting leads to make the circuit shown in Fig. 2.1. The supervisor has set up the circuit shown in Fig. 2.1. The 270Ω resistor is connected in the circuit and the 470Ω resistor and the 560Ω resistor are placed by the side of the circuit. [Figure 2.1]
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