Problem 3: A q₁ = -10.0 nC point charge and a q2 = +20.0 nC point charge are 15 cm apart on the x-axis. 1. What is the electric potential at the point on the x-axis where the electric field is zero? 2. What is the electric field at the point on the x-axis, between the charges, where the electric potential is zero? a) In the figure below, where could a point with E = 0 be located (to the left, to the right, or between the charges)? If the distance between this point and q₁ is r, what should its distance from ¹92 be? (use 1921/1911: = 2 and the fact that electric field strength is proportional to q/r2) Mark the point E = 0 in the figure and compute its coordinate.

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Chapter16: Electrical Energy And Capacitance
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Problem 18P: A positive point charge q = +2.50 nC is located at x = 1.20 m and a negative charge of 2q = 5.00 nC...
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can you help me with Part D, thank you so much

Problem 3: A q₁ = -10.0 nC point charge and a q2 = +20.0 nC point charge are 15 cm apart on the x-axis.
1. What is the electric potential at the point on the x-axis where the electric field is zero?
2. What is the electric field at the point on the x-axis, between the charges, where the electric potential
is zero?
a) In the figure below, where could a point with E = 0 be located (to the left, to the right, or between
the charges)? If the distance between this point and q₁ is r, what should its distance from 92 be? (use
1921/191] = 2 and the fact that electric field strength is proportional to q/r²) Mark the point E = 0 in the
figure and compute its coordinate.
8-10nC 82=20nc
→
x=L= 15 cm
X=O
b) Compute the electric potential at the point E = 0 as a sum of potentials created in that point by
charges 91 and 92.
c) In the figure below, mark the point between the charges where the electric potential is zero (V = 0).
If you just use q21/1911 = 2 and the fact that electric potential is proportional to q/r, the calculation should
be very simple.
₁-10nC 2=20nC
XEO
x=L= 15 cm
d) What is the direction of the electric field E at the point V = 0 (draw the vector in the figure). Compute
its magnitude and express E in the vector form.
Transcribed Image Text:Problem 3: A q₁ = -10.0 nC point charge and a q2 = +20.0 nC point charge are 15 cm apart on the x-axis. 1. What is the electric potential at the point on the x-axis where the electric field is zero? 2. What is the electric field at the point on the x-axis, between the charges, where the electric potential is zero? a) In the figure below, where could a point with E = 0 be located (to the left, to the right, or between the charges)? If the distance between this point and q₁ is r, what should its distance from 92 be? (use 1921/191] = 2 and the fact that electric field strength is proportional to q/r²) Mark the point E = 0 in the figure and compute its coordinate. 8-10nC 82=20nc → x=L= 15 cm X=O b) Compute the electric potential at the point E = 0 as a sum of potentials created in that point by charges 91 and 92. c) In the figure below, mark the point between the charges where the electric potential is zero (V = 0). If you just use q21/1911 = 2 and the fact that electric potential is proportional to q/r, the calculation should be very simple. ₁-10nC 2=20nC XEO x=L= 15 cm d) What is the direction of the electric field E at the point V = 0 (draw the vector in the figure). Compute its magnitude and express E in the vector form.
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