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LEP_4 09.08.2007 11:55 Uhr Seite 154 Electricity Stationary currents 4.1.01-15 Ohm’s Law with FG-Module What you can learn about … Ohm’s law Resistivity Contact resistance Conductivity Power and Work Principle: The electrical resistance of pure metals increases with increasing temperature. The correlation between voltage and current is to be measured using temperature-in- and dependent resistors. Determine the work and power of an incandescent bulb. What you need: Cobra3 BASIC-UNIT, USB 12150.50 1 Power supply 12V/2A 12151.99 2 Measuring module Function Generator 12111.00 1 Connection box 06030.23 1 Carbon resistor 100 Ω, 1W, G1 39104.63 1 Carbon resistor 220 Ω, 1W, G1 39104.64 1 Carbon resistor 330 Ω, 1W, G1 39104.13 1 Lamp socket E 10, G1 17049.00 1 Filament lamps, 12 V/0.1 A 07505.03 1 Connecting cable, 4 mm plug, 32 A, red, l = 50 cm 07361.01 2 Connecting cable, 4 mm plug, 32 A, blue, l = 50 cm 07361.04 2 Software Cobra3 PowerGraph 14525.61 1 PC, Windows® 95 or higher Current, Power and Work of an incandescent bulb. Complete Equipment Set, Manual on CD-ROM included Ohm‘s Law with FG-Module P2410115 Tasks: 1. To plot the current/voltage characteristics of Ohm’s resistors and of pure metals and to calculate their resistivity. You can find more experiments in Handbook “Physics Experiments 2. To determine the resistance of various connecting cords by plotting their current/characteristics and calculating the contact resistances. 3. To determine the work and power of an incandescent bulb as a function of the applied voltage. with Cobra3” Order No. 01310.02 154 Laboratory Experiments Physics PHYWE Systeme GmbH & Co. KG · D - 37070 Göttingen