A student constructed an electric circuit to light a bulb. He used a battery, connecting wires, switch and a bulb as shown in the diagram below. He connected different materials such as copper rod, pencil lead, plastic wire, eraser and a piece of charcoal one by one. He then noted his observations in a table. Which of the following table shows his correct observation? *
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Answer:
options ki a saley
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Explanation:
jwuehribekwbwwisiw ibveihrjr
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