Give one use for a capacitor.

(I) What is the capacitance of a pair of circular plates with a radius of 5.0 cm separated by 2.8 mm of mica?

Find the equivalent capacitor (Ceq)

(3) Would a metal ball with only one sign of charge (unlike a capacitor) store any energy? Explain.

(3) A 3.00 µF capacitor is connected to a 12.0 V battery. How much energy is stored in the capacitor? Had the capacitor been connected to a 6.00 V battery, how much energy would have been stored? If the potential difference across a capacitor is doubled, what happens to the energy stored?

Two separate capacitors, C1 and C2 C1 = 36 micro-Coulomb on 3 micro-Farad   C2 = 72 uC on X uF, X = 3.5 , if zero X =2   C2 had a gap of 0.2m maintained by a compressed plastic spring inside the gap, the natural spring length was 0.5m, the compressed spring length was 0.2 m. Spring constant = 8,000 micro-Newton/ meter Action: Connected the two capacitors in parallel Part A Find Q2-new, C2-new, new gap   Part B Find the initial total energy, the final total energy

(22%) Problem 6: An air-filled capacitor has capacitance Co. When it is connected to a battery with EMF Vo it has charge Qo and stored energy Uo. Once the capacitor has charged, then the switch is opened, and finally a slab of material with dielectric constant K is inserted into the gap. -Vo + Vo d DV 20% Part (a) Which of the following physical quantities does not change when the dielectric material is inserted? Grade = 100% Correct Answver Student Final Submission Feedback Not available until end date The charge stored on the capacitor plates. Correct! Grade Summary Deduction for Final Submission 0% Deductions for Incorrect Submissions, Hints and Feedback [?] 0% Student Grade = 100 - 0 - 0 = 100% Submission History All Date times are displaved in Eastern Standard Time.Red submission date times indicate late work. Date Time Answer Hints Feedback 1 Feb 27, 2021 7:44 PM The charge stored on the capacitor plates. E * 20% Part (b) Enter an expression for the potential difference between…

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A simple adjustable parallel-plates capacitor is shown below. The plates have a radius of 8.0 cm and they are separated by a gap of 0.50 cm with nothing in between them. (a) Calculate the capacitance of this capacitor. (b) Calculate the charge stored when a battery of 9 V is connected to the capacitor. (c) Calculate the energy stored in the capacitor. (d) While the battery is still connected to the capacitor, a 0.50 cm-thick piece of wood (dielectric constant ? = 4.0) is inserted into the gap between the plates. Describe and explain what would happen to the capacitor’s voltage, to the capacitance, and to the stored charge.

(2.) A positive charge of 11 microCoulombs and mass 2 grams is placed next to the positive plate of a capacitor. The voltage across the capacitor is 12 Volts. How fast is the charge moving when it hits the negative plate?