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For a dielectric which of the following properties hold good?
- a)They are superconductors at high temperatures
- b)They are superconductors at low temperatures
- c)They can never become a superconductor
- d)They have very less dielectric breakdown voltage
Correct answer is option 'B'. Can you explain this answer?
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For a dielectric which of the following properties hold good?a)They ar...
Answer: b
Explanation: Superconductors are characterised by diamagnetism behaviour and zero resistivity, which true for a dielectric. They occur only at low temperature. Thus a dielectric can become a superconductor at low temperatures with very high dielectric breakdown voltage.
Explanation: Superconductors are characterised by diamagnetism behaviour and zero resistivity, which true for a dielectric. They occur only at low temperature. Thus a dielectric can become a superconductor at low temperatures with very high dielectric breakdown voltage.
Most Upvoted Answer
For a dielectric which of the following properties hold good?a)They ar...
Dielectrics
Dielectrics are insulating materials that do not conduct electric current easily. They are used in various applications, such as capacitors, insulators, and electrical cables. Unlike conductors, which allow the flow of electric charges, dielectrics inhibit the flow of charges and can store electrical energy. Dielectrics have several properties that make them useful in electrical engineering.
Superconductivity
Superconductivity is a phenomenon in which certain materials exhibit zero electrical resistance when cooled to very low temperatures. At low temperatures, the electrons in the material form Cooper pairs, which allow the flow of current without any resistance. Superconductors have a critical temperature below which they exhibit superconducting behavior.
Dielectrics and Superconductivity
Dielectrics and superconductors are two different types of materials with contrasting electrical properties. While superconductors exhibit zero resistance at low temperatures, dielectrics do not possess this property. Therefore, option 'B' stating that dielectrics are superconductors at low temperatures is incorrect.
Dielectric Breakdown Voltage
Dielectric breakdown voltage is the voltage at which a dielectric material starts to conduct electricity and loses its insulating properties. It is a measure of the maximum electric field that the dielectric can withstand before breaking down. The higher the dielectric breakdown voltage, the better the insulating properties of the material.
Correct Answer: Option 'C'
The correct answer is option 'C' - dielectrics can never become superconductors. Dielectrics do not exhibit superconducting behavior at any temperature. They are designed to have high resistivity and low conductivity, making them suitable for applications where insulation is required.
While some dielectric materials may have low dielectric breakdown voltage, it is not a defining characteristic of dielectrics. The breakdown voltage depends on the specific material and its composition, but it is not a property that holds universally true for all dielectrics.
Dielectrics are insulating materials that do not conduct electric current easily. They are used in various applications, such as capacitors, insulators, and electrical cables. Unlike conductors, which allow the flow of electric charges, dielectrics inhibit the flow of charges and can store electrical energy. Dielectrics have several properties that make them useful in electrical engineering.
Superconductivity
Superconductivity is a phenomenon in which certain materials exhibit zero electrical resistance when cooled to very low temperatures. At low temperatures, the electrons in the material form Cooper pairs, which allow the flow of current without any resistance. Superconductors have a critical temperature below which they exhibit superconducting behavior.
Dielectrics and Superconductivity
Dielectrics and superconductors are two different types of materials with contrasting electrical properties. While superconductors exhibit zero resistance at low temperatures, dielectrics do not possess this property. Therefore, option 'B' stating that dielectrics are superconductors at low temperatures is incorrect.
Dielectric Breakdown Voltage
Dielectric breakdown voltage is the voltage at which a dielectric material starts to conduct electricity and loses its insulating properties. It is a measure of the maximum electric field that the dielectric can withstand before breaking down. The higher the dielectric breakdown voltage, the better the insulating properties of the material.
Correct Answer: Option 'C'
The correct answer is option 'C' - dielectrics can never become superconductors. Dielectrics do not exhibit superconducting behavior at any temperature. They are designed to have high resistivity and low conductivity, making them suitable for applications where insulation is required.
While some dielectric materials may have low dielectric breakdown voltage, it is not a defining characteristic of dielectrics. The breakdown voltage depends on the specific material and its composition, but it is not a property that holds universally true for all dielectrics.
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For a dielectric which of the following properties hold good?a)They are superconductors at high temperaturesb)They are superconductors at low temperaturesc)They can never become a superconductord)They have very less dielectric breakdown voltageCorrect answer is option 'B'. Can you explain this answer?
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