A series of free Science Lessons for 7th Grade and 8th Grade, KS3 and Checkpoint Science in preparation for GCSE and IGCSE Science.
Factors Affecting Resistance
What factors affect resistance?
Cross-sectional Area (thickness)
To measure the relationship between resistance and cross sectional area of a conductor.
Light-Dependent Resistor (LDR) Demo
Use multimeter to measure the resistance of a light-dependent resistor (LDR) that changes resistance when light hits it. When no light hits the LDR, the resistance is greater than 60,000 Ohms. When light hits the LDR, the resistance drops to about 3,000 Ohms.
Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.
You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
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