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Chapter 16: 9CP (page 626)
Question: In a circuit there is a copper wire 40 cm long with a potential difference from one end to the other end of . What is the magnitude of electric field inside the wire?
Answer
0.025V/m
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We discussed a method for measuring the dielectric constant by placing a slab of the material between the plates of a capacitor. Using this method, what would we get for the dielectric constant if we inserted a slab of metal (not quite touching the plates, of course)?
As shown in Figure 16.72, three large, thin, uniformly charged plates are arranged so that there are two adjacent regions of uniform electric field. The origin is at the center of the central plate. Location A is , and location B is . The electric field has the value , and is .
(d) What is the minimum kinetic energy the electron must have at location A in order to ensure that it reaches location B?
You travel along a path from location A to location B, moving in a direction opposite to the direction of the net electric field in that region. What is true of the potential difference
A dipole is centered at the origin, with its axis along the y axis, so that at locations on the y axis, the electric field due to the dipole is given by
The charges making up the dipole are and , and the dipole separation is (Figure 16.82). What is the potential difference along a path starting at location and ending at location ?
Location C is from a small sphere that has a charge ofuniformly distributed on its surface. Location D isfrom the sphere. What is the change in potential along a path from C to D?
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