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Glass wool is a ____________ conductor of electricity.
(A) Good
(B) Bad
(C) Very good
(D) None of the above.

Answer
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Hint: The type of the material which allows the flow of the electric charge or the electricity in one or more directions is known as the conductors of the electricity. Most of the metals are good conductors of electricity such as iron, copper, silver. The materials which do not allow passing of the electricity through it are known as the bad conductors of the electricity. For Example – Glass and plastic.

Complete step by step answer:
The glass wool is an insulating material consisting of intertwined and flexible glass fibres using a binder into a texture similar to the wool. The process holds many small pockets of air between the glass and as a result these small pockets result in the thermal properties of the material.
Glass wool has different thermal and mechanical properties for which it is used as the insulating material since; its excellent electrical insulation is up to thousand degrees 1000C. Other properties include – low expansion, low thermal conductivity, resistance to corrosion from the molten metal and the thermal shock resistance proof.
Therefore, the required answer is – Glass wool is a bad conductor of electricity.
Hence, from the given multiple choices – the option B is the correct answer.

Note: Know the difference between the conductors, semiconductors and the insulators. Refer to the examples and its properties such as the conductivity and the resistivity to solve this type of questions.
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