Physics Physics Practice Problems Solutions Library

# Electric Field Solutions Library

Access 99 Electric Field video and text solutions to help you complete your homework. Need to revisit the concept? Watch our Electric Field learn videos.

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99 solutions

Electric Field

#### Q. In the figure the four particles are fixed in place and have charges q1  = q2 = 3e, q3 = 2e and q4 = -9e. Distance d = 2.17 µm. What is the magnitu...

Solved • Mar 30, 2021

Electric Field

#### Q. (a) If the total positive charge is Q = .62x10-6 C, what is the magnitude of the electric field caused by this charge at point P, a distance d=1.53...

Solved • Mar 30, 2021

Electric Field

#### Q. The electric field of a point charge is inversely proportional toa. r1/2b. rc. r2d. r3

Solved • Mar 30, 2021

Electric Field

#### Q. A 30 nC charge experiences a 0.035 N electric force. What is the magnitude of electric field at the position of this charge?

Solved • Mar 30, 2021

Electric Field

#### Q. At which point is the electric field stronger?A. Point AB. Point BC. Not enough information to tell

Solved • Mar 30, 2021

Electric Field

#### Q. 1. What is the magnitude of the electric field at point P?2. What is the voltage at point P? (As always when dealing with point charges, we assume ...

Solved • Mar 30, 2021

Electric Field

#### Q. Two point charges are separated by 25.0 cm (see the figure (Figure 1) ). Assume that q1 = 6.05 nC and q2 = 11.5 nC.A. Find the magnitude of the net...

Solved • Feb 26, 2021

Electric Field

#### Q. Three positive point charges (Figure 1) are spaced equally along the y axis (), = 5.00 at , = 5.00 at , and = 5.00at . Find the x and y components ...

Solved • Feb 11, 2021

Electric Field

#### Q. For a uniformly charged solid sphere, the relationship between electric field strength and distance from the center isa. inverse.b. quadratic.c. li...

Solved • Feb 10, 2021

Electric Field

#### Q. Gauss’ Law is a more general law than Coulomb’s Lawa. Trueb. False

Solved • Feb 10, 2021

Electric Field

#### Q. A relatively safe place to be during a lightning storm is inside a car, surrounded by metala. Trueb. False

Solved • Feb 10, 2021

Electric Field

#### Q. The electric field is always parallel to the surface outside of a conductor.a. Trueb. False

Solved • Feb 10, 2021

Electric Field

#### Q. Charges -q and +2q in the figure are located at x=+-a.  Determine the electric field at points 1 to 4. Write each field in component form.

Solved • Feb 10, 2021

Electric Field

#### Q. 1) What is the electric field at point 1 in (Figure 1)? Assume that a= 3.0 cm and b = 4.0 cm.2) What is the electric field at point 2 in (Figure 1)...

Solved • Feb 9, 2021

Electric Field

#### Q. A positive charge is located at the center of a cube. a. Are the intersections of the field lines with a side of the box uniformly distributed acro...

Solved • Feb 9, 2021

Electric Field

#### Q. This problem has been solved!See the answerA -2.0 nC charge and a +2.0 nC charge are located on the x-axis at x = -1.0 cm and x = +1.0 cm, respecti...

Solved • Feb 8, 2021

Electric Field

#### Q. A thin, horizontal, 20-cm-diameter copper plate is charged to 4.0 nC . Assume that the electrons are uniformly distributed on the surfacea) What is...

Solved • Feb 3, 2021

Electric Field

#### Q. A platypus foraging for prey can detect an electric field as small as 0.002 N/C To give an idea of the sensitivity of the platypus's electric sense...

Solved • Feb 2, 2021

Electric Field

#### Q. Point charges of 0.27 μC and 0.71 μC are placed 0.45 m apart.a. At what point along the line between them is the electric field zero? Give your ans...

Solved • Jan 27, 2021

Electric Field

#### Q. Point charges of 25.0 µC and 45.0 µC are placed 0.500 m apart. (a) At what point along the line between them is the electric field zero?(b) What is...

Solved • Jan 27, 2021

Electric Field

#### Q. Charge is distributed uniformly along a long straight wire. The electric field 2 cm from the wire is 20 N/C. The electric field 4 cm from the wire is?

Solved • Jan 27, 2021

Electric Field

#### Q. Four charges are situated as shown in the diagram (each grid line is separated by 1 meter). The two upper charges have a charge of +2 μC (+2×10-6 C...

Solved • Jan 21, 2021

Electric Field

#### Q. Four point charges of equal magnitude are arranged at the corners of a square as shown in the figure. Positive charges are indicated by "+" and neg...

Solved • Jan 21, 2021

Electric Field

#### Q. If a negative charge is released in a uniform electric field, it will moveA.  in circular motion. B. in the direction of the electric field. C. in ...

Solved • Jan 17, 2021

Electric Field

#### Q. A very long uniform line of charge has a charge per unit length 4.84 μC/m and lies along the x-axis. A second long uniform line of charge has a cha...

Solved • Jan 13, 2021

Electric Field

#### Q. A -12 nC charge is located at (x,y) = (1.0cm, 0cm). What are the electric fields at the positions (x,y) = (5.0cm, 0cm), (-5.0cm, 0cm), and (0 cm, 5...

Solved • Jan 8, 2021

Electric Field

#### Q. Two pairs of charges are shown in (Figure 1)Part A. At which point or points is the electric field zero in (Figure 1)(a)?Part B. At which point or ...

Solved • Dec 16, 2020

Electric Field

#### Q. Electric fields exist ____________.a. only as an abstractionb. only inside conductorsc. at all points in space around chargesd. only at points in s...

Solved • Nov 3, 2020

Electric Field

#### Q. A +2.00 nC point charge is at the origin, and a second -5.00 nC point charge is on the x-axis at x = 0.800 m. (a) Find the magnitude of the electri...

Solved • Nov 3, 2020

Electric Field

#### Q. A point charge is placed at each comer of a square with side length a. The charges all have the same magnitude q. Two of the charges are positive a...

Solved • Nov 3, 2020

Electric Field

#### Q. When a car is struck by lightning, the resulting electric field inside the car is

Solved • Nov 2, 2020

Electric Field

#### Q. The electric field direction is defined by the direction of the force felt by (select one of the following answers):a. A negative charge.b. A posit...

Solved • Oct 13, 2020

Electric Field

#### Q. Two point charges are placed on the x axis. The first charge, q1 = 8.00 nC, is placed a distance 16.0 m from the origin along the positive x-axis; ...

Solved • Sep 22, 2020

Electric Field

#### Q. A point charge q1 = -4.00 nC is at the point x = 0.600 meters, y = 0.800 meters, and a second point charge q2 = +6.00 nC is at the point x = 0.600 ...

Solved • Sep 22, 2020

Electric Field

#### Q. Part ASpecify the strength of the electric field at the point indicated by the dot. Let r = 6.5 cm.Part BSpecify the direction.

Solved • Jul 20, 2020

Electric Field

#### Q. A proton is placed in a uniform electric field of 2950 N/C.A. Calculate the magnitude of the electric force felt by the proton.(F = ? )B. Calculate...

Solved • Jul 17, 2020

Electric Field

#### Q. Two positive point charges q are placed on the x-axis, one at x = a and one at x = -a.(a) Find the magnitude and direction of the electric field at...

Solved • Jul 16, 2020

Electric Field

#### Q. In the figure, the point charges are located at the corners of an equilateral triangle 26 cm on a side.Find the magnitude of the electric field, in...

Solved • Jul 16, 2020

Electric Field

#### Q. In the figure, the point charges are located at the corners of an equilateral triangle 21 cm on a side. Part (a) Find the magnitude of the electric...

Solved • Jul 16, 2020

Electric Field

#### Q. Figure 17.44 shows an electron passing between two charged metal plates that create an 100 N/C vertical electric field perpendicular to the electro...

Solved • Jul 16, 2020

Electric Field

#### Q. Part AWhat is the direction of the electric field at the dot in the figure (Figure 1)? A) down B) up C) to the right D) to the left Part B What is ...

Solved • Jul 16, 2020

Electric Field

#### Q. Two very large sheets of charge are separated by a distance d. One sheet +o, -O has a surface charge density +o; the other, a surface charge densit...

Solved • Jul 16, 2020

Electric Field

#### Q. Select the correct graph of Ex versus x.  a.b.c.  d.

Solved • Jul 14, 2020

Electric Field

#### Q. Is there a point between a 10 nC charge and a 20 nC charge at which the electric field is zero? If so, which charge is this closer to?

Solved • Jul 14, 2020

Electric Field

#### Q. In the figure, two curved plastic rods, one of charge +q and the other of charge -q, form a circle of radius R = 8.58 cm in an xy plane. The x-axis...

Solved • Jul 14, 2020

Electric Field

#### Q. The electric field outside of a uniformly charged sphere is most like aSelect one:a. ring of chargeb. point chargec. disk of charged. parallel plat...

Solved • Jul 14, 2020

Electric Field

#### Q. The potential difference across a length of wire is increased. Which of the following does not increase as well?A. The electric field in the wire.B...

Solved • Jul 13, 2020

Electric Field

#### Q. A 0.10 g honeybee acquires a charge of +23 pC while flying.a. The electric field near the surface of the earth is typically 100 N/C, directed downw...

Solved • Jul 13, 2020

Electric Field

#### Q. The figure (Figure 1) shows a solid metal sphere at the center of a hollow metal sphere. Assume that E = 1.3x104 N/C1) What is the total charge on ...

Solved • Jul 13, 2020

Electric Field

#### Q. Two point charges (q1 = -4.7 µC and q2 = 8.4 µC) are fixed along the x-axis, separated by a distance d = 8.1 cm. Point P is located at (x,y) = (d,d...

Solved • Jul 13, 2020

Electric Field

#### Q. A free negative charge released in an electric field willa) remain at rest.b) accelerate in a direction perpendicular to the electric field.c) acce...

Solved • Jul 1, 2020

Electric Field

#### Q. What can you say about the field at point 1 compared with the field at point 2?a. The field at point 1 is zero, because point 1 is not on a field l...

Solved • Jul 1, 2020

Electric Field

#### Q. What are the strength and direction of the electric field at the position indicated by the dot in figure (Figure 1)A) Give your answer in terms of ...

Solved • Jul 1, 2020

Electric Field

#### Q. Three negative point charges lie along a line as shown in the figure. Find the magnitude of the electric field this combination of charges produces...

Solved • May 21, 2020

Electric Field

#### Q. The figure (Figure 1) shows a thin rod of length L with total charge Q. Find an expression for the electric field E at distance X from the end of t...

Solved • May 19, 2020

Electric Field

#### Q. (a) Find the direction and magnitude of an electric field that exerts a 4.80x10-17 N westward force on an electron. (b) What magnitude and directio...

Solved • May 19, 2020

Electric Field

#### Q. Finding the Zero-Field PointTwo particles with positive charges q1 and q2 are separated by a distance s.Along the line connecting the two charges, ...

Solved • May 13, 2020

Electric Field

#### Q. In the figure, the point charges are located at the corners of an equilateral triangle 22 cm on a side.A.) Find the magnitude of the electric field...

Solved • May 13, 2020

Electric Field

#### Q. What is the direction of the electric field at the dot?

Solved • May 11, 2020

Electric Field

#### Q. What are the magnitude and direction of the electric field at the dot in Figure below, in which d = 5 cm and theta = 47°?in units of V/m (degree me...

Solved • May 11, 2020

Electric Field

#### Q. What magnitude charge creates a 1.0 N/C electric field at a point 1.0 m away?

Solved • Apr 20, 2020

Electric Field

#### Q. A +16 nC charge is located at the origin.a. What is the strength of the electric field at the position (x,y)=(5.0cm, 0cm)?b. What is the strength o...

Solved • Apr 10, 2020

Electric Field

#### Q. 1. In which case does the electric field at the dot have the largest magnitude? A, B, C, or D2. Three point charges are arranged as shown in the fi...

Solved • Apr 9, 2020

Electric Field

#### Q. A proton is released from rest at the positive plate of a parallel-plate capacitor. It crosses the capacitor and reaches the negative plate with a ...

Solved • Apr 8, 2020

Electric Field

#### Q. An electron is projected with an initial speed 1.20×106 m/s into the uniform field between the parallel plates in the figure. Assume that the field...

Solved • Apr 8, 2020

Electric Field

#### Q. Find the electric field at the origin, point O. Give the x and y components of the electric field as an ordered pair. Express your answer in newton...

Solved • Apr 7, 2020

Electric Field

#### Q. A force of 10 N acts on a charge of 5.0 μC when it is placed in a uniform electric field. What is the magnitude of this electric field?A) 1.0 MN/C ...

Solved • Apr 3, 2020

Electric Field

#### Q. Two point charges are placed on the x-axis. The first charge, q1 = 8.00 nC, is placed a distance 16.0 m from the origin along the positive x-axis; ...

Solved • Mar 24, 2020

Electric Field

#### Q. A point charge q1 = -4.00 nC is at the point x = 0.600 meters, y = 0.800 meters, and a second point charge q2 = +6.00 nC is at the point x = 0.600 ...

Solved • Mar 24, 2020

Electric Field

#### Q. Figure 18.57 shows an electron passing between two charged metal plates that create an 100 N/C vertical electric field perpendicular to the electro...

Solved • Mar 11, 2020

Electric Field

#### Q. (a) What is the strength of the electric field at the position indicated by the dot in the figure?(b) What is the direction of the electric field a...

Solved • Mar 10, 2020

Electric Field

#### Q. In the figure, point A is a distance L away from a point charge Q. Point B is a distance 4L away from Q. What is the ratio of the electric field at...

Solved • Jun 20, 2017

Electric Field

#### Q. Five particles are shot from the left into a region that contains a uniform electric field. The numbered lines show the paths taken by the five par...

Solved • Jun 18, 2017

Electric Field

#### Q. An electron traveling at 2 × 106 m/s enters a 0.08 m region with a uniform electric field of 246 N/C , as in the figure. A) Find the magnitude of ...

Solved • Jun 16, 2017

Electric Field

#### Q. An electron is accelerated by a constant electric field of magnitude 208 N/C. A) Find the magnitude of the acceleration of the electron. The mass ...

Solved • Jun 16, 2017

Electric Field

#### Q. Three point charges are placed at the vertices of an equilateral triangle. Find the magnitude of the electric field E at P. The value of the Coulom...

Solved • Jun 16, 2017

Electric Field

#### Q. Three charges are arranged along the x-axis: +q at x = -2d; +2q at x = d; –4q at x = 2d. Which expression gives the magnitude of the electric field...

Solved • May 30, 2017

Electric Field

#### Q. Two unequal point charges are separated as shown in the figure. The electric field due to this combination of charges can be zero. a) Only in regi...

Solved • May 30, 2017

Electric Field

#### Q. Two point charges are separated by 20 cm and have charges of +8.0 and +16.0 μC, respectively. What is the electric field at a point midway between ...

Solved • May 29, 2017

Electric Field

#### Q. In the four configurations of charges, all the charges are the same magniture, Q, but can be positive or negative. The distance between adjacent it...

Solved • Apr 27, 2017

Electric Field

#### Q. A charge q1 = +5.0 x 10-9 C is located at the origin of an xy-coordinate system, and a charge q2 = -2.0 x 10-9 c is located on the y-axis at y = 0....

Solved • Feb 21, 2017

Electric Field

#### Q. An electron traveling along the +x-axis enters an electric field that is directed vertically down, i.e. along the negative y-axis. What will be the...

Solved • Feb 21, 2017

Electric Field

#### Q. The figure shows two unequal point charges, q and Q, of opposite sign. Charge Q has greater magnitude than charge q. In which of the regions X, Y, ...

Solved • Jan 4, 2017

Electric Field

#### Q. An electron traveling horizontally at 6 × 10 6 m/s enters a 0.05 m region with a uniform electric field of 89 N/C , perpendicular to the electron's...

Solved • Jan 3, 2017

Electric Field

#### Q. A charge of 3 μC is at the origin. Sketch the function E x versus x for both positive and negative values of x. (Remember that Ex is negative when ...

Solved • Jan 3, 2017

Electric Field

#### Q. A charge of 3 μC is at the origin. The Coulomb constant is 8.98755 × 10  9 Nm2/C2. What is the magnitude of the electric field on the x axis at x =...

Solved • Jan 3, 2017

Electric Field

#### Q. Two charged particles are located at x = -a and x = +a, as shown below, on the x-axis. The electric field produced by these two charges at any poin...

Solved • Dec 27, 2016

Electric Field

#### Q. A pendulum has a charged mass at the end of it, as shown in the figure below. If it is in equilibrium, what is the magnitude of the electric field?

Solved • Dec 22, 2016

Electric Field

#### Q. Two charges, q1 = 5 μC  and q 2 = 7 μC, are separated by 10 cm, with q 1 to the left of q2. Where is the net electric field, due to both charges, z...

Solved • Dec 22, 2016

Electric Field

#### Q. Two charges, q1 = -2.50 nC and q 2 = +2.00 nC, are placed 0.400 m apart as shown in the figure. What is the direction  of the electric field at poi...

Solved • Dec 22, 2016

Electric Field

#### Q. Two charges, q1 = -2.50 nC and q 2 = +2.00 nC, are placed 0.400 m apart as shown in the figure. What is the magnitude of the electric field at poin...

Solved • Dec 22, 2016

Electric Field

#### Q. A charged particle traveling along the +x axis enters an electric field directed vertically upward along the +y axis. If the charged particle exper...

Solved • Dec 21, 2016

Electric Field

#### Q. The four charges form a square of edge length a. What is the direction of the net electric field at the square's center? a. -x b. +x c. +y d. -...

Solved • Dec 21, 2016

Electric Field

#### Q. In the figure, point  B is a distance L away from a point charge Q. Point A is a distance 4L away from Q. What is the ratio of the electric field a...

Solved • Dec 21, 2016

Electric Field

#### Q. Four identical point charges, q, are placed at the corners of a square. Each side of the square has length L. What is the magnitude of the electric...

Solved • Dec 21, 2016

Electric Field

#### Q. Two charged metal plates in vacuum are 0.15 m apart, with an electric field between the plates of E = 3000 N/C. A proton (q= +e = 1.6x10-19 C, m = ...

Solved • Dec 20, 2016

Electric Field

#### Q. Find the electric field at point P due to the charges shown.

Solved • Dec 20, 2016

Electric Field

#### Q. An electron traveling along the +x-axis enters an electric field that is directed vertically down, i.e., along the negative y-axis. What will be th...

Solved • Dec 19, 2016

Electric Field

#### Q. Two point charges having charge of -6.25 x 10 -9 C and -12.5 x 10 -9 are 25.0 cm apart. a) Calculate the magnitude of Coulomb force between them. ...

Solved • Dec 19, 2016