Question
Identify the conductor having the highest resistivity.
This question was previously asked in
RRB ALP 2018 CBT 2 Fitter Question Paper (21-Jan-2019) (Shift 3)
The correct answer is
Mercury
Identifying Conductor Resistivity
Resistivity is a material property that measures how strongly it resists electric current. A higher resistivity means a material is a poorer conductor.
Resistivity Comparison of Conductors
Let's compare the approximate resistivities of the given conductors at room temperature (around 20°C):
| Conductor | Resistivity (\(\rho\)) |
| Silver | \(1.59 \times 10^{-8} \Omega \cdot m\) |
| Copper | \(1.68 \times 10^{-8} \Omega \cdot m\) |
| Aluminium | \(2.65 \times 10^{-8} \Omega \cdot m\) |
| Mercury | \(9.4 \times 10^{-7} \Omega \cdot m\) |
Conclusion on Highest Resistivity
Comparing the values:
- Silver, Copper, and Aluminium are excellent conductors with very low resistivities.
- Mercury has a significantly higher resistivity (\(9.4 \times 10^{-7} \Omega \cdot m\)) compared to the others, making it the conductor with the highest resistivity among the options listed.
Therefore, Mercury is the conductor having the highest resistivity.
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Similar Questions
- The resistivity of a conductor depends on the _______.
- Identify the conductor having the lowest resistivity.
- Identify the conductor having the highest resistivity.
- Identify the conductor having the lowest resistivity.
Important Questions from Resistivity of Various Materials
Which of the following graph correctly represents the variation of resistivity 's' with temperature 'T' for a semiconductor material ?
- The resistivity of a conductor depends on the _______.
The correct sequence of increasing order of electrical resistivity of the given material is-
- Identify the conductor having the lowest resistivity.
- Identify the conductor having the highest resistivity.
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