7th Class Science Electric Current and Its Effects Question Bank Electric Current and Its Effects

  • question_answer
    Why is electrical wiring usually made of copper but not silver?

    A)  Copper is a better conductor than silver.

    B)  Copper is a better insulator than silver.

    C)  Copper is less expensive than silver.

    D)  Copper is non-magnetic than silver.

    Correct Answer: C

    Solution :

    Silver is a good conductor of electricity and is non-magnetic, but, it is an expensive material.


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