Two equal and opposite charges are placed at a distance r from each other. A large metallic sheet is placed at a distance d from them as shown in the figure. Due to the presence of the sheet, the attractive force between the charges along the direction joining them (b) increases (d) decreases or increases depending on the conductivity of the sheet. (a) decreases (C) remains unchanged
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- A spherical metallic object with a concentric hole inside initiallyholds a net charge of q1 = −3.84 nC. Then a particle with a charge ofq2 = 9.41 nC is placed at the center of the hole (held by a thin perfectnon-polarizable insulating material).The valueof the net charge on the outer surface of the conductor, upon reachingelectrostatic equilibrium, is most nearly1. An object can acquire an electrical charge by *a) radiation, convection, or friction.b) induction, convection, or radiation.c) contact, induction, or convection.d) friction, contact, or induction.e) contact, friction, or convection. 2. Liquids ____ their volume with higher temperature due to____. *a) increase; decreased crystal structureb) increase; less molecular motionc) decrease; greater molecular motiond) decrease; less molecular motione) increase; greater molecular motion9. A -2.87 μC charge is placed at the center of a conducting spherical shell, and a total charge of +8.10 μC is placed on the shell itself. Calculate the total charge on the outer surface of the conductor. This is not and will not be graded
- Consider the charge distribution shown in Figure P19.74. (a) Show that the magnitude of the electric field at the center of any face of the cube has a value of 2.18 keq/s2. (b) What is the direction of the electric field at the center of the top face of the cube?A device used to detect ionizing radiation consists of a thin positively charged wire surrounded by a concentric cylindrical conducting shell with an equal amount of negative charge on the outer shell. The length of the cylinder and the wire is 16 cm and the radius of the cylinder is of 1.4 cm. The wire at the center has negligible thickness. The electric field at the cylinders inner wall is 2.9 x 104 N/ A) Draw a diagram of the device labeling the direction ofthe electric field. B) Calculate the total charge on the central wire. C) Calculate the flux of electric field at the cylinders wall. D) If an electron were to become free at the outer cylinders wall, calculate the magnitude of acceleration the electron would initially experience.A uniform electric field is applied to a hollow metal. Which of the following statements is correct? a. The interior field points in a direction that is at right angles to the exterior field b. There is no electric field in the block's interior c. The interior points in a direction that is parallel to the exterior field d. The interior field points in a direction opposite to the exterior field
- You have built a device that measures the temperature outside and displays it on a dial as a measure of how far away from room temperature outside is. The way the dial works is that a needle with a charged ball on the end is placed between two charged parallel plates. The strength of the uniform electric field between the plates is proportional to the outside temperature. Given that the charged ball on the needle has a charge of −2.4 µC and the needle can be represented as a string with tension 0.350 N, and is at an angle of 22°, consider the following. What is the mass of the object? gWhat is the magnitude of the electric field? N/CYou have built a device that measures the temperature outside and displays it on a dial as a measure of how far away from room temperature outside is. The way the dial works is that a needle with a charged ball on the end is placed between two charged parallel plates. The strength of the uniform electric field between the plates is proportional to the outside temperature. Given that the charged ball on the needle has a charge of −2.4 µC and the needle can be represented as a string with tension 0.350 N, and is at an angle of 24°, consider the following. What is the mass of the object? gWhat is the magnitude of the electric field?Imagine there are two nested spheres made of different materials: Inner sphere: Made of metal (conductor) with two shells. It has an inner radius of 0.5m, outer radius of 1.5m, and a total negative charge of -1C spread uniformly on its outer surface. Outer sphere: Made of an insulator. It has an inner radius of 2.5m and outer radius of 3m. It carries a positive charge of +2C spread uniformly on its outer surface. Inside these spheres, at the exact center, there's a tiny positive point charge of 0.001C. The question asks: a) How much charge is present on each surface (inner and outer) of the metal sphere? b) What is the electric field strength at different locations (inside and outside the spheres) as you move away from the center? The locations are divided into 5 zones: 1. Inside the inner metal shell (radius less than 0.5m) 2. Between the inner and outer metal shell (radius between 0.5m and 1.5m) 3. Between the metal and insulator shells (radius between 1.5m and 2.5m) 4. Between the…
- A molecule consists of an electric dipole with charges q and -q equal to 1x10^-9 C separated by a distance of 0.5 nm. Assume that the masses of the two sides of the dipole are both equal to 1x10^-20 kg. The dipole is placed in a uniform electric field of magnitude 20,000 N/C. a. The dipole is rotated from an angle of 0º to an angle of 45º with respect to the electric field by an external agent. Calculate the work done against the electric field. b. Calculate the rotational inertia of the dipole about an axis passing through the center of mass. c. The dipole is set into a small angle oscillation. Calculate the period of the oscillation.Each of the following statements is related to conductors in electrostatic equilibrium. Choose the words that make each statement correct. (i) The net charge is always zero [(a) inside; (b) on] the surface of an isolated conductor. (ii) The electric field is always zero [(c) inside; (d) just outside] a perfect conductor. (iii) The charge density on the surface of an isolated, charged conductor is highest where the surface is [(e) sharpest; (f ) smoothest].how do you know if the material is a conductor/insulator?