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Consider the following materials:
1. Carbon
2. Mica
3. Bakelite
4. Fibreglass
Q. Which of these materials are good conductors- of heat, but bad conductors of electricity
1. Carbon
2. Mica
3. Bakelite
4. Fibreglass
Q. Which of these materials are good conductors- of heat, but bad conductors of electricity
- a)1 only
- b)2 only
- c)2 and 3
- d)3 and 4
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Consider the following materials:1. Carbon2. Mica3. Bakelite4. Fibregl...
Mica, Bakelite and fibre glass are insulator material and carbon in the form of diamond is the good conductor of heat but bad conductor of electricity
Most Upvoted Answer
Consider the following materials:1. Carbon2. Mica3. Bakelite4. Fibregl...
Carbon is a good conductor of heat but a bad conductor of electricity. This is due to its unique atomic structure and bonding properties.
Carbon:
- Carbon is a nonmetal element that exists in various forms, including graphite and diamond. Both graphite and diamond have a crystalline structure, but the arrangement of carbon atoms is different in each form.
- In graphite, carbon atoms are arranged in layers that are loosely bonded together. These layers can easily slide over each other, making graphite a good conductor of heat. The delocalized electrons in the carbon layers can also move freely, allowing graphite to conduct electricity.
- On the other hand, in diamond, each carbon atom is covalently bonded to four neighboring carbon atoms in a tetrahedral arrangement. This strong bonding makes diamond a poor conductor of heat and electricity.
Mica:
- Mica is a silicate mineral that consists of thin, layered sheets of aluminum silicate. These sheets are stacked together, forming a structure with weak bonds between the layers.
- The weak bonding between the layers allows mica to easily split into thin sheets, making it a good electrical insulator. However, the layers also provide pathways for the transfer of heat, making mica a good conductor of heat.
Bakelite:
- Bakelite is a type of thermosetting plastic that was widely used in the early 20th century. It is made by combining phenol and formaldehyde under high heat and pressure.
- Bakelite is an excellent electrical insulator due to its high resistance to the flow of electric current. However, it is also a good conductor of heat because the polymer chains in Bakelite allow for the transfer of thermal energy.
Fibreglass:
- Fibreglass, also known as glass fiber, is a composite material made from fine fibers of glass embedded in a matrix of resin.
- The glass fibers in fibreglass provide high strength and stiffness, making it suitable for various applications. However, glass is a poor conductor of heat and electricity. The insulation properties of fibreglass are mainly attributed to the non-conductive nature of glass.
In conclusion, carbon is the only material among the given options that is a good conductor of heat but a bad conductor of electricity. Mica, Bakelite, and fibreglass have different properties when it comes to electrical and thermal conductivity.
Carbon:
- Carbon is a nonmetal element that exists in various forms, including graphite and diamond. Both graphite and diamond have a crystalline structure, but the arrangement of carbon atoms is different in each form.
- In graphite, carbon atoms are arranged in layers that are loosely bonded together. These layers can easily slide over each other, making graphite a good conductor of heat. The delocalized electrons in the carbon layers can also move freely, allowing graphite to conduct electricity.
- On the other hand, in diamond, each carbon atom is covalently bonded to four neighboring carbon atoms in a tetrahedral arrangement. This strong bonding makes diamond a poor conductor of heat and electricity.
Mica:
- Mica is a silicate mineral that consists of thin, layered sheets of aluminum silicate. These sheets are stacked together, forming a structure with weak bonds between the layers.
- The weak bonding between the layers allows mica to easily split into thin sheets, making it a good electrical insulator. However, the layers also provide pathways for the transfer of heat, making mica a good conductor of heat.
Bakelite:
- Bakelite is a type of thermosetting plastic that was widely used in the early 20th century. It is made by combining phenol and formaldehyde under high heat and pressure.
- Bakelite is an excellent electrical insulator due to its high resistance to the flow of electric current. However, it is also a good conductor of heat because the polymer chains in Bakelite allow for the transfer of thermal energy.
Fibreglass:
- Fibreglass, also known as glass fiber, is a composite material made from fine fibers of glass embedded in a matrix of resin.
- The glass fibers in fibreglass provide high strength and stiffness, making it suitable for various applications. However, glass is a poor conductor of heat and electricity. The insulation properties of fibreglass are mainly attributed to the non-conductive nature of glass.
In conclusion, carbon is the only material among the given options that is a good conductor of heat but a bad conductor of electricity. Mica, Bakelite, and fibreglass have different properties when it comes to electrical and thermal conductivity.
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Consider the following materials:1. Carbon2. Mica3. Bakelite4. FibreglassQ.Which of these materials are good conductors- of heat, but bad conductors of electricitya)1 onlyb)2 onlyc)2 and 3d)3 and 4Correct answer is option 'A'. Can you explain this answer?
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