Henry is running short of connecting wires, inorder to complete the circuit he may use:
A
Glass rod
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B
Plastic wire
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C
Rubber pipe
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D
Iron wire
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Solution
The correct option is D Iron wire Henry requires a conductor i.e which can allow electricity to pass through it. Iron is a good conductor of electricity. Whereas glass, plastic and rubber are insulators. Insulators are the materials which do not allow electric current to pass through them.