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There are seven materials : Pure water...

There are seven materials : Pure water , air , copper , aluminium , plastic , steel and glass .Out of these , how many materials are insulators ?

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To determine how many materials from the given list are insulators, we need to identify which materials do not allow electric current to flow through them. Here’s a step-by-step solution: ### Step 1: List the materials The materials given are: 1. Pure water 2. Air 3. Copper 4. Aluminium ...
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Knowledge Check

  • Out of the following the most plastic material is

    A
     iron
    B
     wood
    C
     rubber
    D
     plasticine

  • There is a variety of materials that are used to make components of electrical circuits . These materials have good electrical conductivity . Ispite of having the largest conducivity among metals , silver is not used to make electric wires . Aluminium copper and are generally used to make electic wires .Not only conductors , insulators are alos important .the electrical wires are covered with plastic and rubber like materials . This is used to prevent short circuit and also to protect the user . What kind of materials are used to make electrical wires in an electric circuit ?

    A
    Insulators
    B
    Conductors
    C
    Electrolytes
    D
    All of these

  • Metals like copper, aluminium and silver allow electricity to flow through them. They are good conductors of electricity. Other substances like plastic, rubber and cloth do not allow electricity to flow through them. They are insulators and are grouped under non-metals. Similarly, some metals like iron, copper, aluminium and steel get heated easily. They are good conductors of heat. Non-metals like paper and wood do not get heated easily. These are poor conductors of heat. Metals are malleable, ductile and sonorous. Which of these materials would you choose to make a bell for temple?

    A
    Plastic
    B
    Copper
    C
    Wood
    D
    Glass

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    Metals like copper, aluminium and silver allow electricity to flow through them. They are good conductors of electricity. Other substances like plastic, rubber and cloth do not allow electricity to flow through them. They are insulators and are grouped under non-metals. Similarly, some metals like iron, copper, aluminium and steel get heated easily. They are good conductors of heat. Non-metals like paper and wood do not get heated easily. These are poor conductors of heat. Metals are malleable, ductile and sonorous. Which metal is used to make foils for wrapping food material?

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