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Question

If the dielectric constant and dielectric strength be denoted by K and x respectively, then a material suitable for use as a dielectric in a capacitor must have

A
High k and high x
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B
Low k and Low x
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C
High k and Low high x
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D
Low k and High x
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Solution

The correct option is A High k and high x

Higher the value of k, higher will be its insulating property and capacitance of capacitor .
Higher the value of x, higher will be the ability to withstand electric field gradient (higher breakdown voltage ) and less chance of breakdown of dielectric .
Thus, material should have high k and high x.
Hence, the correct option is (A).

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