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Two rods A and B, made from different plastics, were given the static electrical charges shown in the diagram - Junior Cycle Science - Question a - 2008
Question a
Two rods A and B, made from different plastics, were given the static electrical charges shown in the diagram. (i) How could you have charged the rods as shown? (6)... show full transcript
Worked Solution & Example Answer:Two rods A and B, made from different plastics, were given the static electrical charges shown in the diagram - Junior Cycle Science - Question a - 2008
Step 1
Step 2
Describe with the help of a labelled diagram how the force between the two charged rods A and B could be investigated.
Answer
You can investigate the force between the two charged rods by suspending them with threads, ensuring they can move freely. Bring the rods close together and observe the interaction. The expected result is that the rods will attract each other due to the opposite charges on each rod.
Step 3
Explain clearly why this only happens in dry weather.
Answer
In dry weather, the lack of moisture allows electric charge to accumulate on surfaces without escaping. Dampness or moisture would provide a pathway for the charges to dissipate or 'earth' themselves, thus preventing a significant build-up of static electricity. During dry conditions, conditions are favorable for static charge accumulation, such as when friction occurs while pushing a trolley.