A series of free GCSE/IGCSE Physics Notes and Lessons.
In this lesson, we will describe how to investigate the factors affecting the resistance of electrical circuits.
How the resistance of electrical circuits is affected by the length of a wire at constant temperature?
Required practical: Resistance
The resistance of the wire is directly proportional to the length.
A zero error is a reading on a measuring instrument when the value should be zero. This is a systematic error. We cannot reduce it by carrying out repeats. In the case of resistance, we need to subtract the zero error from all of our readings. There is also some resistance caused by the contact between the crocodile clip and the wire.
If the temperature of the wire increases, then the resistance will also increase. Some of the precautions to take:
Resistance vs Length Of Wire - GCSE Science Required Practical
Experiment to show how to measure the resistance of a wire when you change its length.
Try the free Mathway calculator and
problem solver below to practice various math topics. Try the given examples, or type in your own
problem and check your answer with the step-by-step explanations.
We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.