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Which of the following properties has got higher value for aluminium in comparison to that of copper?
- a)Electrical resistivity
- b)Melting point
- c)Thermal conductivity
- d)Specific gravity
Correct answer is option 'A'. Can you explain this answer?
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Which of the following properties has got higher value for aluminium ...
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Which of the following properties has got higher value for aluminium ...
Electrical resistivity:
- Aluminium has a higher value for electrical resistivity compared to copper. Electrical resistivity is the measure of a material's ability to resist the flow of electric current.
- Aluminium has an electrical resistivity of approximately 2.65 x 10^-8 ohm-meter, while copper has an electrical resistivity of around 1.68 x 10^-8 ohm-meter.
- A higher electrical resistivity means that aluminium offers more resistance to the flow of electric current than copper, making it less conductive.
Melting point:
- Copper has a higher melting point compared to aluminium. The melting point of copper is around 1084.62°C, while the melting point of aluminium is approximately 660.32°C.
- This means that copper can withstand higher temperatures before melting compared to aluminium.
Thermal conductivity:
- Copper has a higher value for thermal conductivity compared to aluminium. Thermal conductivity is the measure of a material's ability to conduct heat.
- Copper has a thermal conductivity of about 401 W/mK, whereas aluminium has a thermal conductivity of around 237 W/mK.
- This indicates that copper is better at conducting heat compared to aluminium.
Specific gravity:
- Specific gravity is the ratio of the density of a material to the density of a reference material (usually water).
- Aluminium has a lower specific gravity compared to copper. The specific gravity of aluminium is around 2.7, while the specific gravity of copper is approximately 8.96.
- This means that copper is denser than aluminium.
- Aluminium has a higher value for electrical resistivity compared to copper. Electrical resistivity is the measure of a material's ability to resist the flow of electric current.
- Aluminium has an electrical resistivity of approximately 2.65 x 10^-8 ohm-meter, while copper has an electrical resistivity of around 1.68 x 10^-8 ohm-meter.
- A higher electrical resistivity means that aluminium offers more resistance to the flow of electric current than copper, making it less conductive.
Melting point:
- Copper has a higher melting point compared to aluminium. The melting point of copper is around 1084.62°C, while the melting point of aluminium is approximately 660.32°C.
- This means that copper can withstand higher temperatures before melting compared to aluminium.
Thermal conductivity:
- Copper has a higher value for thermal conductivity compared to aluminium. Thermal conductivity is the measure of a material's ability to conduct heat.
- Copper has a thermal conductivity of about 401 W/mK, whereas aluminium has a thermal conductivity of around 237 W/mK.
- This indicates that copper is better at conducting heat compared to aluminium.
Specific gravity:
- Specific gravity is the ratio of the density of a material to the density of a reference material (usually water).
- Aluminium has a lower specific gravity compared to copper. The specific gravity of aluminium is around 2.7, while the specific gravity of copper is approximately 8.96.
- This means that copper is denser than aluminium.
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Which of the following properties has got higher value for aluminium in comparison to that of copper?a)Electrical resistivityb)Melting pointc)Thermal conductivityd)Specific gravityCorrect answer is option 'A'. Can you explain this answer?
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