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  5. Metals and Non-metals / धातु और अधातु

10th Class Science Metals and Non-metals / धातु और अधातु

  • question_answer 64)
        Electrical wires have a coating of an insulating material. The material, generally used is (a) sulphur                          (b) graphite                        (c) PVC                                 (d) All can be used

    Answer:

                      (c) PVC is an insulating substance. It does not allow electric current to pass through it. The electrical wires have a covering of PVC around them.


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