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Chapter 26: Q. 14 (page 738)
The electric potential along the V, where is in meters. What is at
(a) and
(b) ?
The field is and .
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Two 5.0 mm * 5.0 mm electrodes are held 0.10 mm apart and are attached to a 9.0 V battery. Without disconnecting the battery, a 0.10-mm-thick sheet of Mylar is inserted between the electrodes. What are the capacitor鈥檚 potential difference, electric field, and charge
(a) before and
(b) after the Mylar is inserted?
A capacitor being charged has a current carrying charge to and away from the plates. In the next chapter we will define current to be the rate of charge flow. What is the current to a capacitor whose voltage is increasing at the rate of ?
Figure EX26.3 is a graph of . What is the potential difference between and ?
What is the potential difference between and in the uniform electric field ?
Consider a uniformly charged sphere of radius R and total cAlC charge Q. The electric field outside the sphere is simply that of a point charge Q. In Chapter 24, we used Gauss's law to find that the electric field inside the sphere is radially outward with field strength
a. The electric potential outside the sphere is that of a point charge Q. Find an expression for the electric potentialat position r inside the sphere. As a reference, let at the surface of the sphere.
b. What is the ratio
c. Graph V versus r for 0 r 3 R.
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