If you're behind a web filter, please make sure that the domains *.and *.are unblocked.Physics Practical Report: Experiment: Ohmic Resistance and Ohm’s Law Patrick Doan Mr Sadowsky 11 PHYS 71 12/9/08 Table of contents 1.0 Aim 1 2.0 Hypothesis 1 3.0 Materials 1 4.0 Method 2 5.0 Results 3 - 5.1 Qualitative Observations 3 - 5.2 Data 3-4 6.0 Discussion 5 7.0 Conclusion 6 8.0 Bibliography 7 9.0 Acknowledgements 7 1.0 Aim: To find out how current, voltage and resistance in a circuit are related, also to discover the relationship known as ‘Ohm’s Law’.Experiment two: As mentioned earlier in the discussion, the resistor shows an ohmic behavior since increasing current does not lead to a significant increase in temperature in this case, and hence the resistance remains constant throughout the experiment.
Then these were connected to the voltmeter and amphometer in a way which the figure above shows.
The voltmeter was set at 20 V and the amphometer was set at 200 m.
then the light bulb or the resistor was connected to a potential difference.
The measurements of the voltmeter and amphometer were product of current flowing through a conductor and the resistor R is always equal to the potential difference V across the two ends of the conductor as long as the temperature and the other physical conditions of the conductor do not change.(V=R .
Since the experiment was only done once for each conductor systematic and random errors may affect the results obtained.
You will discover and learn the basics of electronics with an introduction to capacitors, resistors, and Ohms law. How does this affect the brightness of the two bulbs? Therefore, the bulb with the lower resistance will shine brighter.The slight difference can be due to systematic error.The light bulb did not obey ohm’s law while the resistor obeys ohm’s law.3.5 V/0.3 A), however, since it is necessary to remove the glass bulb to verify the hypotheses, it is recommended to use the 230 V light bulb from the beginning.If you're seeing this message, it means we're having trouble loading external resources on our website.With the light bulb, as the power input became higher the heat in the light bulb also rose thus creating greater resistance.This shows that resistance is affected by temperature. Tungsten is such a good conductor that its resistance depends on its temperature.The tungsten’s temperature increases the power dissipated by the also bulb increases.In general, power dissipated by the bulb relates to the brightness of the bulb; the higher the power, the brighter the light bulb.2.0 Hypothesis: In this experiment, conductors are used.Conductors which obey Ohm’s Law are called Ohmic conductors.