Electric Field Problem

A proton is moving parallel to a uniform electric field. The electric field accelerates the proton and increases its linear momentum to 5.0 10-23 kg · m/s from 1.5 10-23 kg · m/s in a time of 6.0 10-6 s. What is the magnitude of the electric field?

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16.62) Two small charged pieces of amber experiences a force when they are separted by a distance R. If the charge on each of the bodies is tripled and the separation between them is halved, what is the ratio of the new force to the original force between them?

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The hydrogen atom may be described as a postively charged proton surrounded by an orbiting, negatively charged electron. In a simple model, the electron is in a circular orbit of radius r= 5.29 x 10( to the negative 11) m about a stationary proton. The mass of the proton is mp= 1.67 x 10 (negative 27)kg and the mass of the proto ...continues

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16.70) A solid insulating sphere of radius R has an electric charge uniformly distributed throughout its volume. The charge per unit volume is p (a) Show that outside the sphere the electric field is given by E= pR3 divided by 3EOr squared, where r is the distance from the center of the sphere. (b) Show that the field inside the ...continues

The electric field and the force experienced by a charge.

16.72) Four equal charges of + 3.0 x 10(negative 7) C are placed on the corners of one face of a cube of edge length 10.0 cm. A charge of -3.0 x 10(negative 7) C is placed at the center of the cube. What are the magnitude and the direction of the force on the charge at the center of the cube?

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17.62) A pair of parallel plates are separted by 1.5 mm of air. An electric field of 3.0 x 10 (negative 4) V/m exists between the plates. What is the potential difference between the plates?

Capacitance of a parallel plate capacitor with dielectric.

17.68) A capacitor is made from two parallel conducting plates, each with an area of 860 squared. The plates are separated by a dielectric film 0.250 mm thick. Measurements show that the potential difference between the plates is 185 V when the charge on the plates is 1.75 uC. (a) What is the capacitance of the capacitor? (b) Wh ...continues

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17.72) A 100- uF parallel- plate capacitor is charged to 500 V. It is then disconnected from the charging source and insulated. (a) How much energy is stored on the capacitor? (b) If the plates are pulled apart to a seperation that is twice their initial aeparation, what energy is tored on the capacitor> (c) If the answers are n ...continues

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17.66) An isolated metal sphere of radius R( one) carries an electrical charge Q. A second sphere of radius R (second) and initially uncharged is brought into contact with the first sphere. Charge is exchanged between the two and they are separated. How much charge remains on the first sphere?

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17.62) A pair of parallel plates is separated by 1.0mm of air. If the plates are changed to a potential difference of 75 V, what is the electric field between the plates?