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What is dielectric strength?...

What is dielectric strength?

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**Step-by-Step Text Solution:** 1. **Definition of Dielectric Strength**: Dielectric strength is defined as the maximum electric field that a dielectric material can withstand without experiencing breakdown or failure. It is a measure of the material's ability to insulate against electric current. 2. **Understanding Dielectric Materials**: Dielectric materials are insulators that can be polarized in the presence of an electric field. When an electric field is applied, the positive and negative charges within the dielectric material shift slightly, creating dipoles. 3. **Behavior of Charges in an Electric Field**: In an electric field, positive charges tend to move in the direction of the field, while negative charges move in the opposite direction. This movement creates a force on the charges, which can lead to the formation of dipoles. ...
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Knowledge Check

  • dielectrics are

    A
    conducting substances
    B
    non-conducting substances
    C
    combustible substances
    D
    preservative substances

  • A dielectric is

    A
    a bad conductor of electricity
    B
    a good conductor of electricity
    C
    also called a capacitor
    D
    an electric device having two magnetic poles

  • Maximum energy stored in a capacitor consisting dielectric constant of dielectric strength U_(d) and breakdown voltage V= U_(d)d is given by

    A
    `(1)/(2) epsi AdU_(d)`
    B
    `(1)/(2) epsi Ad U_(d)^(2)`
    C
    `epsi Ad U_(d)^(2)`
    D
    `epsi A d U_(d)`

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    A parallel plate capacitor is to be designed with a voltage rating 1 kV, using a material of dielectric constant 3 and dielectric strength about 10^7V m^(-1) . (Dielectric strength is the maximum electric field a material can tolerate without breakdown, i.e., without starting to conduct electricity through partial ionisation). For safety, we should like the field never to exceed, say 10% of the dielectric strength. What minimum area of the plates is required to have a capacitance of 50 pF ?

    A parallel -plate capacitor is to be designed, using a dielectric of dielectric constant 3, so as to have a dielectric strength of 10Vm^(-2) . If the voltage rating of the capacitor is 12kV, the minimum area of each plate required to have a capacitance of 80pF is

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

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