- The variable capacitance of an old radio tuner consists of four plates connected together placed alternately between four other plates, also connected together (Fig. 19–92). Each plate is separated from its neigh- bor by 1.6 mm of air. One set of plates can move so that the area of overlap of each plate varies from 2.0 cm² to 9.0 cm?. (a) Are these seven capacitors connected in series or in parallel? (b) Determine the range of capaci- tance values. FIGURE 19-92 Problem 95.

Q: A capacitor is connected to a battery and fully charged. What becomes of the charge on the capacitor…

A: Let’s assume that the capacitor is charged by Q Coulomb when connected to a battery. Now, after…

Q: Capacitors of 5µF, 10 µF, and 20 µF are arranged (a) in series (b) in parallel. In which arrangement…

A: Given data: Capacitance       C1=5μFC2=10μFC3=20μF

Q: Determine the equivalent capacitance ( in mF units) of the combination shown when C = 6.2 mF. To Tac…

A:

Q: Suppose you have a 9.5 nF capacitor. Find the charge, in microcoulombs, stored on it when 1.5 V is…

A: Charge is given by, q=CV

Q: In Fig. 19–86, let V = 10.0 V and C1=C2= C3 = 25.4 µF. How much energy is stored in the capacitor…

A: The net capacitance of combination of C1 parallel to series combination of C2 in series with C3 is…

Q: wo equal air-filled capacitors of Co 15 aF are connected in series. A dielectric slab of constant K…

A:

Q: When a battery is connected to a capacitor, why do thetwo plates acquire charges of the same…

A: In General , Capacitors are sepaarated by a non- insulating  media .So , the charges cannot move…

Q: (11) The unit for the dielectric constant is 1- Cm 2- J/C 3- V/m 4- A/W 5- None of the above

A:

Q: (II) If 21.0 V is applied across the whole network of Fig. 19–63, calculate (a) the voltage across…

A:

Q: Sketch the equipotential lines for the two equal positive charges as shown.   Indicate the direction…

A: Introduction: The equipotential lines are defined as the lines with constant electric potential.…

Q: How much energy stored in a capacitor (120 F) which 15 C of charge?

A: given: capacitance C = 120 F charge Q = 15 C

Q: An air-filled parallel-plate capacitor has a capacitance of 1.6 pF. The separation of the plates is…

A: The parallel plate capacitor diagram is given by:

Q: We have seen that the capacitance C depends on the sizeand position of the two conductors, as well…

A: For an isolated spherical conductor of radius R is given with a charge Q, the its potential is given…

Q: The given parallel-plate capacitor has a plate area A = 140 cm² and a plate separation d = 1.77 mm.…

A:

Q: Discuss on methods to increase the capacitance value of parallel plate capacitors without using…

A: SOlution: How we can increase the capactance of the capacitor.

Q: A capacitor is formed by two conductive plates separated by air. They each acquire density of 3.60x…

A: Given: Density of charge (Q) = 3.6×10-6 Cm2. Potential difference applied (V) = 1.1×102 V.

Q: Suppose the energy stored in this equivalent capacitor is U = 8.9J, now much charge (in Coulombs C)…

A: Given energy stored U = 8.9 ×10 -6 J

Q: In a photocell, ultraviolet (UV) light provides enough energy to some electrons in barium metal to…

A:

Q: hen t = t, what is the total charge, in units of microcoulomb, accumulated in the capacitors?

A:

Q: Suppose you have a 175 μF capacitor. What charge is stored in it when 114 V is applied to it, in…

A: Given: The capacitance is 175 μF. The potential difference is 114 V.

Q: stored on the parallel-plate capacitors by the 12.0 V battery? One is filled with air, and the other…

A: Given,

Q: -48 Figure 25-47 shows a parallel- plate capacitor with a plate area A = 5.56 cm? and separation d =…

A:

Q: 11. Shown below are four (4) arrangements of capacitors. Each has an equivalent capacitance. Rank…

A:

Q: 6-7. In the circuit given below, Ci=60µF, C2=20 µF, C3=9 µF and C4=12 µF. If the potential…

A: Given data: The capacitors are C1=60 μF, C2=20 μF,C3=9 μF and C4=12 μF The potential is Vab=120 V

Q: Can we give any desired charge to a Capacitor? Explain in words not more than 50.

A: Solution:   No, as we increase the charge on the plates of a capacitor, the potential difference…

Q: Suppose that the charge stored in the 2-F capacitor is 4.5C, what is its voltage (in V)?

A: Given that Capacitance(C)=2F Charge(Q)=4.5C To determine that- what is its voltage (in V)?

Q: Does the capacitance of a device depend on the applied voltage? Does the capacitance of a device…

A:

Q: Many cells in the body havea cell membrane whose inner and outer surfaces carry oppositecharges,…

A: (a) The expression for the magnitude of the electric field within the cell membrane is written as,…

Q: Suppose three identical capacitors are connected to a battery.Will they store more energy if…

A: The energy stored in a capacitor can be determined as, Here, CT and V represent the total…

Q: An air-filled parallel-plate capacitor has a capacitance of 1.7 pF. The separation of the plates is…

A: Given that  Capacitance of air-filled capacitor, C0 = 1.7 pF Capacitance of wax filled capacitor, C1…

Q: Two equal air-filled capacitors of Co= 15 µF are connected in series. A dielectric slab of constant…

A:

Q: We know that electric field is discontinuous across the surface of a charged conductor. Is electric…

A: Given: Electric field is discontinuous

Q: An air filled parallel plate capacitor of C-21.7 nF is connected across a battery of AV-160 V. Find…

A: Given data: Capacitance of the capacitor C=21.7nF Potential difference V=160V

Q: If capacitors are also used to store energy, what makes it different to batteries? When do we often…

A: