18. (I) Point charges Q₁ = 25 µC and Q₂ = −50 µC are placed on the y axis as shown in Fig. 23.38. A point charge q = 2 μC is on the x axis. (a) Find the field strength due to Q₁ and 22 at the position of q. (b) If q is halved, what happens to the field calculated in part (a)? (c) What happens to the field found in part (a) if the sign of q is changed? Q₁ 3 m 3 m 4 m
18. (I) Point charges Q₁ = 25 µC and Q₂ = −50 µC are placed on the y axis as shown in Fig. 23.38. A point charge q = 2 μC is on the x axis. (a) Find the field strength due to Q₁ and 22 at the position of q. (b) If q is halved, what happens to the field calculated in part (a)? (c) What happens to the field found in part (a) if the sign of q is changed? Q₁ 3 m 3 m 4 m
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Transcribed Image Text:18. (I) Point charges Q₁ = 25 μC and Q₂ = -50 μC are placed
on the y axis as shown in Fig. 23.38. A point charge q = 2
μC is on the x axis. (a) Find the field strength due to Q₁ and
Q2 at the position of q. (b) If q is halved, what happens to
the field calculated in part (a)? (c) What happens to the field
found in part (a) if the sign of q is changed?
3 m
3 m
4 m
FIGURE 23.38 Exercise 18.
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