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Question

Materials which allow only larger currents to flow through them are


A
Insulators
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B
Semi-conductors
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C
Conductors
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D
Alloys
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Solution

The correct option is B Semi-conductors
Semiconductors in their natural state are poor conductors because a current requires the flow of electrons, and semiconductors have their valence band filled, preventing the entry flow of new electrons. Thus semi-conductors allows a large current to pass through them.

Physics

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