Chapter 23: Q. 3 (page 653)
What are the strength and direction of the electric field at the position indicated by the dot in FIGURESpecify the direction as an angle above or below horizontal.
Short Answer
The strength of the electric field is .
Chapter 23: Q. 3 (page 653)
What are the strength and direction of the electric field at the position indicated by the dot in FIGURESpecify the direction as an angle above or below horizontal.
The strength of the electric field is .
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Charge Q is uniformly distributed along a thin, flexible rod of length L. The rod is then bent into the semicircle shown in FIGURE. 23.47
a. Find an expression for the electric field at the center of the semicircle.
Hint: A small piece of arc length spans a small angle , where is the radius.
b. Evaluate the field strength if localid="1651169583117" and localid="1651169587457" .
Show that the on-axis electric field of a ring of charge has the expected behavior when and when.
A parallel-plate capacitor consists of two square plates, size separated by distance d. The plates are given charge. What is the ratio of the final to initial electric field strengths if
(a) Q is doubled,
(b)L is doubled, and
(c) d is doubled? Each part changes only one quantity; the other quantities have their initial values
A plastic rod with linear charge density is bent into the quarter circle shown in FIGURE. We want to find the electric field at the origin.
a. Write expressions for the - and -components of the electric field at the origin due to a small piece of charge at angle .
b. Write, but do not evaluate, definite integrals for the - and -components of the net electric field at the origin.
c. Evaluate the integrals and write in component form
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