Question

In: Physics

The plates of an isolated parallel plate capacitor with a capacitance C carry a charge Q....

  1. The plates of an isolated parallel plate capacitor with a capacitance C carry a charge Q. The plate separation is d. Initially, the space between the plates contains only air. Then, an isolated metal sheet of thickness 0.5d is inserted between, but not touching, the plates. How does the potential difference between the plates change as a result of inserting the metal sheet?

2. A research Van de Graaff generator has a 2.00-m-diameter metal sphere with a charge of 5.00 mC on it. (a) What is the potential near its surface? (b) At what distance from its center is the potential 1.00 MB

3. How far apart are two conducting plates that have an electric field strength of 4.50x103 V/m between them, if their potential difference is 15.0 4.

4. What is the capacitance of a parallel plate capacitor having plates of area 1.5 m2 that are separated by 0.0200 mm of neoprene rubber? (b) What charge does it hold when 9.00 V is applied to it? The dielectric constant of neoprene rubber is 6.7.

Solutions

Expert Solution


Related Solutions

Consider two oppositely charged, isolated parallel plates separated by distance D, with capacitance C, charge Q,...
Consider two oppositely charged, isolated parallel plates separated by distance D, with capacitance C, charge Q, and stored energy U. D is small compared to the dimensions of the plates. For each statement below, select "True" or "False". 1. Because of energy conservation, inserting a dielectric leaves U unchanged. 2. When D is halved, Q stays the same. 3. Inserting a dielectric decreases C. 4. When D is doubled, U increases. 5. When D is doubled, C is doubled. 6....
A parallel-plate capacitor with circular plates and a capacitance of 10.3 μF is connected to a...
A parallel-plate capacitor with circular plates and a capacitance of 10.3 μF is connected to a battery which provides a voltage of 11.2 V . What is the charge on each plate? How much charge would be on the plates if their separation were doubled while the capacitor remained connected to the battery? How much charge would be on the plates if the capacitor were connected to the battery after the radius of each plate was doubled without changing their...
A parallel-plate capacitor has capacitance C = 15.7 pF when the volume between the plates is...
A parallel-plate capacitor has capacitance C = 15.7 pF when the volume between the plates is filled with air. The plates are circular, with radius 2.50 cm. The capacitor is connected to a battery and a charge of magnitude 28.0 pC goes into each plate. With the capacitor still connected to the battery, a slab of dielectric is inserted between the plates, completely filling the space between the plates. After the dielectric has been inserted, the charge on each plate...
An isolated parallel-plate capacitor (not connected to a battery) has a charge of Q = 2.4×10−5C....
An isolated parallel-plate capacitor (not connected to a battery) has a charge of Q = 2.4×10−5C. The separation between the plates initially is d = 1.2 mm, and for this separation the capacitance is 3.1×10−11F. Calculate the work that must be done to pull the plates apart until their separation becomes 8.3 mm, if the charge on the plates remains constant. The capacitor plates are in a vacuum. Express your answer using two significant figures
A parallel plate air capacitor with a capacitance of C (0.02 F) is connected to a...
A parallel plate air capacitor with a capacitance of C (0.02 F) is connected to a 12V battery and charged. The capacitor is then disconnected from the battery and a dielectric with a dielectric constant of k (3.2) is inserted between the plates. How much energy will be stored in the capacitor after inserting the dielectric (6 points)? please explain step by step
Which statements are true for two oppositely charged, isolated parallel plates: C=capacitance, U=stored energy (Q and...
Which statements are true for two oppositely charged, isolated parallel plates: C=capacitance, U=stored energy (Q and -Q = charge on the plates). Note: Isolated plates can not lose their charge. a) Inserting a dielectric increases Q. b) True False  Increasing the distance increases the Electric field. c) True False  When the distance is halved, Q stays the same. d) True False  Inserting a dielectric increases C. e) True False  Inserting a dielectric decreases U. f) True False  When the distance is doubled, U increases. g)...
A parallel-plate air-filled capacitor has a capacitance of 335 pF. If each of its plates has...
A parallel-plate air-filled capacitor has a capacitance of 335 pF. If each of its plates has an area of 0.025 m2, what is the separation? If the region between the plates is now filled with germanium, what is the capacitance?
A capacitor C with plate separation d is charged with ±Q on the two plates. It...
A capacitor C with plate separation d is charged with ±Q on the two plates. It is then connected (at time t = 0) to a resistor R and discharged. a. What is the time dependence of the charge? b. What is the power radiated at time t? c. What is the total energy radiated away? d. What fraction of the total energy is radiated away? e. Suppose C = 1 nF,R = 1000 Ω, and d =0 .1 mm....
A parallel plate capacitor consisting of square plates is charged. One edge of the plates is...
A parallel plate capacitor consisting of square plates is charged. One edge of the plates is 0.4 (m). When the current is 5 (A), the rate of change of the electric field between the plates is approximately how many V / (m.s). Eo = 8.85x10-12 (SI)
The plates of an air-filled parallel-plate capacitor with a plate area of 15.0 cm2 and a...
The plates of an air-filled parallel-plate capacitor with a plate area of 15.0 cm2 and a separation of 8.95 mm are charged to a 170-V potential difference. After the plates are disconnected from the source, a porcelain dielectric with κ = 6.5 is inserted between the plates of the capacitor. (a) What is the charge on the capacitor before and after the dielectric is inserted? Qi = C Qf = C (b) What is the capacitance of the capacitor after...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT