Which of the following substances is a bad conductor of electricity?

Question

Rods $x$ and $y$ of equal dimensions but of different materials are joined as shown in figure. Temperatures of end points $A$ and $F$ are maintained at $100^\circ$C and $40^\circ$C respectively. Given the thermal conductivity of rod $x$ is three times of that of rod $y$, the temperature at junction points $B$ and $E$ are (close to):

Answer 1

To identify the poor electrical conductor among the given substances, we examine their electrical conductivity properties:

Diamond: Characterized by a rigid tetrahedral structure of carbon atoms, each bonded to four others. This arrangement lacks mobile electrons, rendering diamond an insulator.
Gold: A metal renowned for its high electrical conductivity, attributable to a large quantity of free-moving electrons.
Silver: Exhibits superior electrical conductivity among metals, owing to an abundant supply of free electrons that facilitate efficient charge transport.
Graphite: A distinct allotrope of carbon with a layered structure. Each carbon atom is bonded to three others, forming sheets with delocalized electrons capable of free movement, thus making graphite a conductor.

Consequently, Diamond is identified as the substance with poor electrical conductivity.

Which of the following substances is a bad conductor of electricity?

The Correct Option is A

Solution and Explanation

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