The voltage across an air-filled parallel-plate capacitor is measured to be V1 =106.0 V. When a dielectric is inserted and completely fills the space between the plates, as in the figure below, the voltage drops to V2 =31.2 V. (a) What is the dielectric constant of the inserted material? (b) If the dielectric doesn't completely fill the space between the plates, what could you conclude about the voltage across the plates?

University Physics Volume 2
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Chapter8: Capacitance
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Problem 61P: The dielectric to be used in a parallel-plate capacitor has a dielectric constant of 3.60 and a...
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The voltage across an air-filled parallel-plate capacitor is measured to be V1 =106.0 V. When a dielectric is inserted and completely fills the space between the plates, as in the figure below, the voltage drops to V2 =31.2 V.

 

(a) What is the dielectric constant of the inserted material?

(b) If the dielectric doesn't completely fill the space between the plates, what could you conclude about the voltage across the plates?

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