Physics Laboratory Experiments
8th Edition
ISBN: 9781285738567
Author: Jerry D. Wilson, Cecilia A. Hernández-Hall
Publisher: Cengage Learning
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Chapter 22, Problem 3ASA
What are equipotentials, and how are they experimentally determined? What is their relationship to the electric field lines?
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Physics Laboratory Experiments
Ch. 22 - Prob. 1ASACh. 22 - What are lines of force, and what force is it?Ch. 22 - What are equipotentials, and how are they...Ch. 22 - What is a magnetic field, how is it defined, and...Ch. 22 - Does the magnetic field B S have the same...Ch. 22 - How may a magnetic pole be moved in a magnetic...Ch. 22 - Directions of the fields are indicated on field...Ch. 22 - Comment on the electric field of the parallel...Ch. 22 - Sketch the electric field for (a) a negative point...Ch. 22 - Compare the electric fields and magnetic fields of...
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- If the electric field at a point on the line between two charges is zero, what do you know about the charges?arrow_forwardWhat is an equipotential line? What is an equipotential surface?arrow_forwardThe lesser electric ray (Narcine bancroftii) maintains an incredible charge on its head and a charge equal in magnitude but opposite in sign on its tail (Figure 19.32). (a) Sketch the equipotential lines surrounding the ray. (b) Sketch the equipotentials when the ray is near a ship with a conducting surface. (C) How could this charge distribution be of use to the ray? Figure 19.32 Lesser electric ray (Narcine bancroftii) (credit: National Oceanic and Atmospheric Administration, NOAAs Fisheries Collection).arrow_forward
- A simple and common technique for accelerating electrons is shown in Figure 18.55, where there is a uniform electric field between two plates. Electrons are released, usually from a hot filament, near the negative plate, and there is a small hole in the positive plate that allows the electrons to continue moving. (a) Calculate the acceleration of the electorn if the field strength is 2.50104 N/C. (b) Explain why the electron will not be pulled back to the positive plate once it moves through the hole.arrow_forwardIn Franklins time, a device for storing electric potential energy was called a Leyden jar. Today, we call that device a capacitor. Another term that is sometimes used is condenser. What ideas do these three terms bring to mind? What are the advantages and disadvantages of each?arrow_forwardExplain in your own words why equipotential lines and surfaces must be perpendicular to electric field lines.arrow_forward
- Sketch the equipotential lines surrounding the two conducting plates shown in Figure 19.30, given the top plate is positive and the bottom plate has an equal amount of negative charge. Be certain to indicate the distribution of charge on the plates. Is the field strongest where the plates are closest? Why should it be? Figure 19.30arrow_forwardUse the characteristics of the of the Coulomb force to explain why capacitance should be proportional to the plate area of a capacitor. Similarly, explain why capacitance should be inversely proportional to the separation between plates.arrow_forwardYour friend gets really excited by the idea of making a lightning rod or maybe just a sparking toy by connecting two spheres as shown in Figure 7.39, and making R2so small that the electric field is greater than the dielectric strength of air, just from the usual 150 V/m electric field near the surface of the Earth. If R1is 10 cm. how small does R2to be, and does this seem practical? (Hint: recall the calculation for electric field at the surface of a conductor from Gauss's Law.)arrow_forward
- A supermarket sells rolls of aluminum foil, plastic wrap, and waxed paper. (a) Describe a capacitor made from such materials. Compute order-of-magnitude estimates for (b) its capacitance and (c) its breakdown voltage.arrow_forwardA capacitor is designed so that one plate is large and the other is small. If the plates are connected to a battery, (a) the large plate has a greater charge than the small plate, (b) the large plate has less charge than the small plate, or (c) the plates have equal, but opposite, charge.arrow_forwardA capacitor is designed so that one plate is large and the other is small. If the plates are connected to a battery, (a) the large plate has a greater charge than the small plate, (b) the large plate has less charge than the small plate, or (c) the plates have equal, but opposite, charge.arrow_forward
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