FSG-PPT-060610 (pdf) - DrJJ - UiTM

Outcome Based Education 07/06/2010http://drjj.uitm.edu.myLaunch the Circuit Construction Kit (DC). Construct the circuit with only a single bulb connectedin the circuit. Set the bulb resistance to 5 ohms and the battery’s voltage to 6 V.Predict the current flowing at point B in the circuit. Then throw the switch down and make yourmeasurement. Compare your predictions to the measured current and try to explain anysimilarities or differences you obtained.Bsituation 1S 1AObserve the bulb intensity and the current measured at point Bas you increase (to 8 V) or decrease (to 4 V) the battery’svoltage while keeping the bulb’s resistance constant. Recordyour observation.Repeat the observation but this time keep the battery’s voltageat 6 V while the bulb’s resistance is increased or decreased.Battery6 VA6/7/2010Copyright DrJJ, ASERG, FSG, UiTM. March 2010 163Launch the Circuit Construction Kit (DC). Construct the circuit with an additional bulbadded to the the single bulb as shown in situation 2. Set the bulb resistances to 5 ohmsand the battery’s voltage to 6 V. Predict the current flowing at point B, C & E in the circuit.Then throw the switches S 1, S 2& S 3down and make your measurements. Compare yourpredictions to the measured current and try to explain any similarities or differences youobtained.Observe the bulb intensity and the current measured atBBattery1.5 VAS 1situation 2ADS 2CRFS 3A 1A 2ERhttp://drjj.uitm.edu.mypoints B & C when switch S 3is lifted up and throwndown repeatedly.Set the battery’s voltage at 4 V and observe the bulbintensity and the current measured at points B & Cwhen switch S 3is lifted up and thrown downrepeatedly.Compare the current at point B and the bulb’s intensitynow to the current and intensity when there was onlyone bulb in the circuit.What happens to the current reading and the bulb’sintensity when the bulb’s more bulbs are added as insituation 2? Increased? Decreased? No change?6/7/2010Copyright DrJJ, ASERG, FSG, UiTM. March 2010 164Copyright DR JJ, ASERG, UiTM, Shah Alam 82