Materials in appliances: Why is mica used inside devices such as electric irons and toasters? Identify the key property that makes mica suitable as spacers/insulators near hot elements. Choose the correct option.
IIT JEE
Physics
Difficulty: Easy
Choose an option
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AIt is an excellent conductor of electricity
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BIt is a good electrical insulator with high heat resistance (high dielectric strength)
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CIt has very high magnetic permeability
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DIt reacts to produce cooling
Answer
Correct Answer: It is a good electrical insulator with high heat resistance (high dielectric strength)
Explanation
ConceptMica is a sheet silicate with excellent electrical insulation, high dielectric strength, and thermal stability, ideal near heating coils.
Final AnswerIt is a good electrical insulator with high heat resistance (high dielectric strength)