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Identifying electric conductivity of a material:Arrange an electric circuit with a battery and bulb. Close the circuit using an iron nail, as shown in figure. Observe whether the bulb glows or not. Record your observations in table. Repeat the same experiment using the other samples and record your observations in the same table.SampleCan we convert it into wiresIronYesZincYesCopperYesSulphurNoAluminiumYesCarbonNoMagnesiumNoIodineNoa) Do all the samples allow the bulb to glow?b) What is name given to these material which allows electricity to pass them and make to bulb to glow are called?c) Give examples for good conductors of electricity?d) Talk to an electrician. Look at the handles of his tools. Are the handles made of the same materials? If not why? |
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Answer» a) No. Materials like iron, zinc, copper allows bulb to glow. b) They are called conductors. c) Copper, iron, aluminium d) No. The handles of his tools are made of electrical insulating material in order to avoid electrical shock. |
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