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Chapter 24: Q21P (page 711)
Question: The ammonia molecule NH3 has a permanent electric dipole moment equal to,1.47 D where,. Calculate the electric potential due to an ammonia molecule at a point 52.0nmaway along the axis of the dipole. (Set v = 0at infinity.)
Answer:
The electric potential due to an ammonia molecule is.
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In the situation of Question 7, is the work done by your force positive, negative, or zero if the particle is moved (a) from Ato B, (b) from Ato C, and (c) from Bto D? (d) Rank those moves according to the magnitude of the work done by your force, greatest first.
Suppose Nelectrons can be placed in either of two configurations. In configuration 1, they are all placed on the circumference of a narrow ring of radius Rand are uniformly distributed so that the distance between adjacent electrons is the same everywhere. In configuration 2, N-1electrons are uniformly
distributed on the ring and one electron is placed in the center of the ring. (a) What is the smallest value of Nfor which the second configuration is less energetic than the first? (b) For that value of N, consider any one circumference electron鈥攃all it eo. How many other circumference electrons are closer to eothan the central electron is?
Question: Figure 24-47 shows a thin plastic rod of length L = 12.0 cmand uniform positive charge Q = 56.1fClying on an xaxis. With V = 0at infinity, find the electric potential at point P1 on the axis, at distance d = 250 cmfrom the rod.
Here are the charges and coordinates of two charged particles located in an xyplane:,,androle="math" localid="1662728679285" ,,. How much work must be done to locate these charges at their given positions, starting from infinite separation?
Suppose that in a lightning flash the potential difference between a cloud and the ground is and the quantity of charge transferred is 30 C. (a) What is the change in energy of that transferred charge? (b) If all the energy released could be used to accelerate a 1000 kgcar from rest, what would be its final speed?
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