Problem 1CQ: Four lightweight balls A, B, C, and D are suspended by threads. Ball A has been touched by a plastic... Problem 2CQ: Plastic and glass rods that have been charged by rubbing with wool and silk, respectively, hang by... Problem 3CQ: When you take clothes out of the drier right after it stops, the clothes often stick to your hands... Problem 4CQ: The positive charge in Figure Q20.5 is +Q. What is the negative charge if the electric field at the... Problem 5CQ: As shown in Figure Q20.6, metal sphere A has 4 units of negative charge and metal sphere B has 2... Problem 6CQ: Figure Q20.7 shows a positively charged rod held near, but not touching, a neutral metal sphere.... Problem 7CQ: A plastic balloon that has been rubbed with wool will stick to a wall. a. Can you conclude that the... Problem 8CQ: You are given two metal spheres on portable insulating stands, a glass rod, and a piece of silk.... Problem 9CQ: A metal rod A and a metal sphere B, on insulating stands, touch each other as shown in Figure... Problem 10CQ Problem 11CQ Problem 12CQ Problem 13CQ Problem 14CQ Problem 15CQ Problem 16CQ Problem 17CQ: Iontophoresis is a noninvasive process that transports drugs through the skin without needles. In... Problem 18CQ: A positively charged particle is in the center of a parallel-plate capacitor that has charge Q on... Problem 19CQ: Two charged particles are separated by 10 cm. Suppose the charge on each particle is doubled. By... Problem 20CQ: A small positive charge q experiences a force of magnitude F1, when placed at point 1 in Figure... Problem 21CQ: A typical commercial airplane is struck by lightning about once per year. When this happens, the... Problem 22CQ: Microbes such as bacteria have small positive charges when in solution. Public health agencies are... Problem 23CQ: a. Is there a point between a 10 nC charge and a 20 nC charge at which the electric field is zero?... Problem 24CQ Problem 25CQ Problem 26MCQ Problem 27MCQ Problem 28MCQ Problem 29MCQ Problem 30MCQ: A glass bead charged to +3.5 nC exerts an 8.0 104 N repulsive electric force on a plastic bead 2.9... Problem 31MCQ: A +7.5 nC point charge and a 2.0 nC point charge are 3.0 cm apart. What is the electric field... Problem 32MCQ Problem 33MCQ Problem 34MCQ Problem 35MCQ Problem 36MCQ Problem 37MCQ Problem 1P: A glass rod is charged to +5.0 nC by rubbing. a. Have electrons been removed from the rod or protons... Problem 2P Problem 3P: A plastic rod is charged to 20 nC by rubbing. a. Have electrons been added to the rod or protons... Problem 4P Problem 5P: A plastic rod that has been charged to 15.0 nC touches a metal sphere. Afterward, the rod's charge... Problem 6P: A glass rod that has been charged to +12.0 nC touches a metal sphere. Afterward, the rod's charge is... Problem 7P: Two identical metal spheres A and Bare in contact. Both are initially neutral. 1.0 1012 electrons... Problem 8P: Two identical metal spheres A and Bare connected by a plastic rod. Both are initially neutral. 1.0 ... Problem 9P Problem 10P Problem 11P: Two 1.0 kg masses are 1.0 m apart on a frictionless table. Each has +1.0 C of charge. a. What is the... Problem 12P Problem 13P Problem 14P: A small plastic sphere with a charge of 5.0 nC is near another small plastic sphere with a charge of... Problem 15P: A small metal bead, labeled A, has a charge of 25 nC. It is touched to metal bead B, initially... Problem 16P: A small glass bead has been charged to +20 nC. A tiny ball bearing 1.0 cm above the bead feels a... Problem 17P Problem 18P Problem 19P: Object A, which has been charged to +10 nC, is at the origin. Object B, which has been charged to 20... Problem 20P Problem 21P: What magnitude charge creates a 1.0 N/C electric field at a point 1.0 m away? Problem 22P Problem 23P: What are the strength and direction of the electric field 2.0 cm from a small glass bead that has... Problem 24P Problem 25P: What are the strength and direction of the electric field 1.0 mm from (a) a proton and (b) an... Problem 26P: A 30 nC charge experiences a 0.035 N electric force. What is the magnitude of electric field at the... Problem 27P: A 10 nC charge is located at the origin. a. What are the strengths of the electric fields at the... Problem 28P: A +1 0 nC charge is located at the origin. a. What are the strengths of the electric fields at the... Problem 29P Problem 30P Problem 31P: A parallel-plate capacitor is constructed of two square plates, size L L, separated by distance d.... Problem 32P Problem 33P: A parallel-plate capacitor is formed from two 4.0 cm 4.0 cm electrodes spaced 2.0 mm apart. The... Problem 34P: Two identical closely spaced circular disks form a parallel-plate capacitor. Transferring 1.5 109... Problem 35P: A parallel-plate capacitor is constructed of two horizontal 12.0-cm-diameter circular plates, A 1 0... Problem 36P Problem 37P Problem 38P Problem 39P: What are the strength and direction of an electric field that will balance the weight of (a) a... Problem 40P Problem 41P: A 0.10 g plastic bead is charged by the addition of 1.0 1010 excess electrons. What electric field... Problem 42P Problem 43P: One kind of e-book display consists of millions of very small spheres that float in a thin fluid... Problem 44P Problem 45P: A protein molecule in an electrophoresis gel has a negative charge. The exact charge depends on the... Problem 46P: Large electric fields in cell membranes cause ions to move through the cell wall, as we will explore... Problem 47P: Molecules of carbon mon-oxide are permanent electric dipoles due to unequal sharing of electrons... Problem 48GP: A 2.0-mmdiameter copper ball is charged to +50 nC. What fraction of its electrons have been removed?... Problem 49GP: Two protons are 2.0 fm apart. (1 fm= 1 femtometer = 1 1015 m.) a. What is the magnitude of the... Problem 50GP: The nucleus of a 12Xe atom (an isotope of the element xenon with mass 125 u) is 6.0 fm in diameter.... Problem 51GP: Two equally charged, 1.00 g spheres are placed with 2.00 cm between their centers. When released,... Problem 52GP: An electric dipole is formed from 1.0 nC point charges spaced 2.0 mm apart. The dipole is centered... Problem 53GP Problem 54GP Problem 55GP Problem 56GP Problem 57GP Problem 58GP Problem 59GP Problem 60GP: As shown in Figure P20.52, a 5.0 nC charge sits at x = 0 in a uniform 4500 N/C electric field... Problem 61GP Problem 62GP: In a simple model of the hydrogen atom, the electron moves in a circular orbit of radius 0.053 nm... Problem 63GP: A 0.10 g honeybee acquires a charge of +23 pC while flying. a. The electric field near the surface... Problem 64GP: Two 2.0-cm-diameter disks face each other, 1.0 mm apart. They are charged to 10 nC. a. What is the... Problem 65GP: The electron gun in a television tube uses a uniform electric field to accelerate electrons from... Problem 66GP Problem 67GP: A 4.0 mg bead with a charge of 2.5 nC rests on a table. A second bead, with a charge of 5.6 nC, is... Problem 68GP Problem 69GP: A small charged bead has a mass of 1.0 g. It is held in a uniform electric field E = (200,000 N/C,... Problem 70GP: A bead with a mass of 0.050 g and a charge of 15 nC is free to slide on a vertical rod. At the base... Problem 71GP Problem 72GP Problem 73GP: A small bead with a positive charge q is free to slide on a horizontal wire of length 4.0 cm. At the... Problem 74GP: A parallel-plate capacitor consists of two plates, each with an area of 28 cm2, separated by 3.0 mm.... Problem 76MSPP: Which of the following describes the charges on the droplets that end up in the five tubes, moving... Problem 77MSPP: Because the droplets are conductors, a droplet's positive and negative charges will separate while... Problem 78MSPP: Another way to sort the droplets would be to give each droplet the same charge, then vary the... format_list_bulleted