MULTIPLE CHOICE 691 (A) C (a) Which arrangement would have the largest equivalen

Question

MULTIPLE CHOICE 691 (A) C (a) Which arrangement would have the largest equivalent ca- Cremains the same. D) There is not enough information to answer the question. (b) If each arrangement were connected to a 12-V potential b) How does the capacitance of this system change if r is de difference, in which case would the largest amount of charge be transferred? (B) C decre (c) Each arrangement is connected to a potential difference so (C) C remains the same. (D) There is not enough information to answer the question that the same amount of charge is transferred. Which requires the largest potential difference? 30-3 Calculating the Capacitance Which of the following changes to an ideal parallel-plate O-5 Energy Storage in an Electric Field capacitor connected to an ideal battery will result in an (19e A parallel-plate capacitor is connected to an ideal battery, crease in the charge on the capacitor which provides a fixed potential difference. Originally the en- (A) Decreasing the potential difference across the plates ergy stored in the capacitor is U.. If the distance between the (B) Decreasing the area of the plates plates is doubled, then the new energy stored in the capacitor (C) Decreasing the separation of the plates D) None of the above B) 20%. 5, Equation 30-5 neglects fringing effects near the edge of the plates. Does this cause Eq. 30.5 to under or (11, A parallel-plate capacitor is charged by connecting it to an capacitance of a real parallel-plate capacitor? ideal battery: the capacitor is then disconnected. Originally the energy stored in the capacitor is U.. If the distance be- tween the plates is doubled, then the new energy sored in the (C) Neither the expression capacitor will be 6. What is the capacitance of a single spherical coaductor of ra- (A) dius A) 4 men (B) 4 meow (C) eolr A student originally charges a fixed capacitor to have a poten- Capacitance is undefined for a single object. energy of J. Ir the student wishes lo give the capacitor a 0-4 Capacitors in Series and Parallel potential energy of 4 J. then the student should Two capacitors Ci and are connected in series; assume that (A) quadruple the potential difference across the capacitor Ca-The equivalent capacitance of this arrangement but leave the charge unchanged. (B) double the potential difference across the capacitor but B) C/2 C (A) C C12. (C) double both the potential difference across the capaci- tor and the charge Two capacitors Ci and Ca are connected in parallel; assume (D) leave the potential difference across the capacitor un- that c The equivalent capacitance of this arrangement changed while doubling the charge. An inflated balloon is covered with a C, where B) C/2 charge g. The balloon develops a leak and the radius starts to decrease, but no charge is lost from the surface. (a) How does the capacitance of the balloon change as the (E) 2C2 Four possible capacitor arrangements are shown in Fig. 30.16 balloon leaks? 9. (B) C for three identical capacitors. Cremains the same. D) There is not enough information to answer the ques- (b) How does the stored electrical energy change as the bal- loon leaks? (A (CI U remains the same. (D) There is noe enough information to answer the ques- o-6 Capacitor with Consider a parallel-plate capacitor originally with a charge and potential difference A%. There is an electrostatic force of magnitude F between the plates and the capacitor has a stored energy U The terminals of the ca pacitor are nor connected dielectric slab with K, I is inserted between the plates. Which quantities increase? cChoose all that apply) RE 30-16-

Explanation / Answer

(5)

option (c) is correct answer

(6)

option(b) is correct answer

(7)

1/C = 1/C1 + 1/C2

let C1 = 2 uF and C2 = 4 uF

1/C = 1/ 2 + 1/4

C = 1.33 uF

option(b) is correct answer

(8)

when C1 and C2 are connected in paralle

C = C1 + C2 = 2+ 4 = 6 uF

option (D) is correct answer

as per guide lines I worked first four pats , please post remining posts in the next time

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