The voltage across an air-filled parallel-plate capacitor is measured to be 192.

Question

The voltage across an air-filled parallel-plate capacitor is measured to be 192.0 V. When a dielectric is inserted and completely fills the space between the plates as in the figure below, the voltage drops to 56.5 V.

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


Can you identify the dielectric? (nylon, teflon, neoprene rubber, bakelight, paper


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

The voltage across an air-filled parallel-plate capacitor is measured to be 192.0 V. When a dielectric is inserted and completely fills the space between the plates as in the figure below, the voltage drops to 56.5 V. (a) What is the dielectric constant of the inserted material? Can you identify the dielectric? (nylon, teflon, neoprene rubber, bakelight, paper (b) If the dielectric doesn't completely fill the space between the plates, what could you conclude about the voltage across the plates?

Explanation / Answer

Voltage change is 192/56.5 = 3.4, and because voltage is proportional to C, that is the dielectric constant.

Teflon is 2.1, Rubber is 7, paper is 3.5
looks like paper

b) If it doesnt fill completely then C is less than KCo (for filled ) and hence V is higher than Vo (in case of completely filled ) so V >56.5 V

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.