# Ap physics electrostatics test

Which among the complying with statements ideal defines why tiny bits of paper are attracted to a charged rubber rod?
Five styrofoam balls are suspended from insulating threads. Several experiments are perdeveloped on the balls; and also the adhering to observations are made:I. Ball A attracts B and also A repels C.II. Ball D attracts B and D has no result on E.III. A negatively charged rod attracts both A and E.What are the charges, if any kind of, on each ball?
Two uncharged conducting spheres, A and also B, are suspended from insulating threads so that they touch each various other. While a negatively charged rod is organized close to, yet not poignant spbelow A, someone moves round B away from A. How will the spheres be charged, if at all?
Each of three objects has a net charge. Objects A and also B entice one an additional. Objects B and C additionally attract one another, yet objects A and C repel one an additional. Which one of the adhering to table entries is a possible combination of the indicators of the net charges on these three objects?
A conducting spbelow has actually a net charge of -6.4 × 10-17 C. What is the approximate variety of excess electrons on the sphere?
Complete the adhering to statement: When an ebonite rod is rubbed through pet hair, the rod becomes negatively charged as
Complete the complying with statement: When a glass rod is rubbed with silk fabric, the rod becomes positively charged as
A charged conductor is brought close to an uncharged insulator. Which among the following statements is true?
An aluminum nail has an excess charge of +3.2 µC. How many kind of electrons should be included to the nail to make it electrically neutral?
Two uncharged, conducting spheres, A and B, are organized at remainder on insulating stands and are in contact. A positively charged rod is carried near spbelow A as said in the figure. While the rod is in location, someone moves spbelow B away from A. How will the spheres be charged, if at all?
Consider 3 similar steel spheres, A, B, and also C. Sphere A carries a charge of -2.0 µC; spbelow B carries a charge of -6.0 µC; and spright here C carries a charge of +4.0 µC. Spheres A and also B are touched together and also then separated. Spheres B and also C are then touched and also separated. Does sphere C finish up through an excess or a deficiency of electrons and also just how many type of electrons is it?
Two charged pwrite-ups A and also B are located near one another. Both the magnitude and direction of the force that pshort article A exerts on pwrite-up B is independent of
E) The magnitude and direction of the force are dependent on every one of the above options. (the sign of charge B, the sign of charge A, the distance between A and B, the magnitude of the charge on B.)
Four point charges, each of the same magnitude, through varying indicators are arranged at the corners of a square as displayed. Which of the arrows labeled A, B, C, and D offers the correct direction of the net pressure that acts upon the charge at the top ideal corner?
Two positive suggest charges Q and also 2Q are separated by a distance R. If the charge Q experiences a pressure of magnitude F as soon as the separation is R, what is the magnitude of the pressure on the charge 2Q as soon as the separation is 2R ?
A charge Q exerts a 1.2 N force on an additional charge q. If the distance between the charges is doubled, what is the magnitude of the pressure exerted on Q by q?
At what separation will 2 charges, each of magnitude 6.0 mC, exert a force of 0.70 N on each other?
One mole of a substance consists of 6.02 × 1023 prolots and also an equal variety of electrons. If the protons could somejust how be separated from the electrons and also put in incredibly small, individual containers separated by a million meters, what would certainly be the magnitude of the electrostatic force exerted by one box on the other?
Three charges are positioned as shown in the number. What are the horizontal and also vertical components of the net pressure exerted on the +15 µC charge by the +11 µC and +13 µC charges?
A -4.0-µC charge is located 0.45 m to the left of a +6.0-µC charge. What is the magnitude and direction of the electrostatic force on the positive charge?
Determine the ratio of the electrostatic pressure to the gravitational force between a proton and an electron, FE/FG. Note: k = 8.99 × 109 N-m2/C2; G = 6.672 × 10-11 N-m2/kg2; me = 9.109 × 10-31 kg; and also mp = 1.672 × 10-27 kg.

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In Frame 1, 2 similar conducting spheres, A and also B, lug equal quantities of excess charge that have the exact same sign. The spheres are separated by a distance d; and spright here A exerts an electrostatic pressure on spright here B that has a magnitude F. A third sphere, C, which is taken on just by an insulating rod, is presented in Frame 2. Spright here C is the same to A and B other than that it is initially uncharged. Spright here C is touched initially to sphere A, in Frame 2, and then to sphere B, in Frame 3, and also is lastly rerelocated in Frame 4.
Three the same allude charges, Q, are put at the vertices of an equilateral triangle as displayed in the figure. The length of each side of the triangle is d. Determine the magnitude and also direction of the total electrostatic force on the charge at the height of the triangle.
Three charges are situated alengthy the x axis as displayed in the drawing. The mass of the -1.2 µC is 4.0 × 10-9 kg. Determine the magnitude and direction of the acceleration of the -1.2 µC charge when it is permitted to relocate if the various other two charges remajor resolved.
Four suggest charges are hosted solved at the corners of a square as displayed in the figure. Which of the 5 arrows shown listed below a lot of accurately reflects the direction of the net pressure on the charge -Q as a result of the existence of the 3 other charges?
Is it possible to pick the worth of Q (that is non-zero) such that the force on Q is zero? Exordinary why or why not.
Determine an expression for the magnitude and authorize of Q so that the net force on the charge at A is zero newtons.
Which one of the complying with statements is true concerning the magnitude of the electric field at a point in space?
In the number, allude A is a distance L amethod from a point charge Q. Point B is a distance 4L away from Q. What is the ratio of the electrical field at B to that at A, EB/EA?
At which suggest (or points) is the electric area zero N/C for the 2 point charges shown on the x axis?
An electron traveling horizontally enters an area where a unidevelop electric field is directed upward. What is the direction of the pressure exerted on the electron as soon as it has entered the field?
Which one of the following statements is true concerning the toughness of the electrical field in between two oppositely charged parallel plates?
Two pposts of the exact same mass carry charges +3Q and also -2Q, respectively. They are shot right into a region that has a uniform electric area as displayed. The particles have the same initial velocities in the positive x direction. The lines, numbered 1 with 5, indicate possible routes for the particles. If the electric field points in the negative y direction, what will certainly be the resulting courses for these particles?
What is the magnitude of the electrical field due to a 6.0 × 10-9 C charge at a point situated 0.025 m from the charge?
Which among the complying with statements concerning the direction of the electric area in between the plates is true?
A tiny spright here of mass 2.5 × 10-5 kg carries a total charge of 6.0 × 10-8 C. The spright here hangs from a silk thcheck out between 2 huge parallel conducting plates. The excess charge on each plate is equal in magnitude, however opposite in authorize. If the threview renders an angle of 30° through the positive plate as displayed, what is the magnitude of the charge thickness on each plate?
Complete the following statement: The magnitude of the electric area at a point in area does not depfinish upon
Four suggest charges are inserted at the corners of a square as presented in the figure. Each side of the square has actually size 2.0 m. Determine the magnitude of the electric field at the allude P, the center of the square.
The figure mirrors the electrical field lines in the vicinity of two suggest charges. Which among the complying with statements concerning this instance is true?
A rigid electrical dipole is totally free to move in the electrical area stood for in the number. Which one of the adhering to phrases the majority of accurately defines the initial activity of the dipole if it is released from remainder in the position shown?
An electrical dipole is released from remainder in a unidevelop electric field via the orientation presented. Which enattempt in the table listed below properly defines the net torque and the net pressure on the dipole?
Which among the following statements is true concerning the spacing of the electrical area lines in the vicinity of 2 allude charges of equal magnitude and opposite sign?
D) The charge is completely on the surchallenge and also it is distributed according to the shape of the object.
The magnitude of the electrical field at a distance of two meters from a negative point charge is E. What is the magnitude of the electrical field at the exact same place if the magnitude of the charge is doubled?
What is the magnitude and also direction of the electric pressure on a -3.0 µC charge at a allude where the electrical field is 2800 N/C and also is directed along the +y axis.
A conducting spbelow carries a net charge of +6 µC. The sphere is situated at the center of a conducting spherical shell that carries a net charge of -2 µC. Determine the excess charge on the external surconfront of the spherical shell.
A cubical Gaussian surface is put in a unidevelop electrical area as presented in the number. The size of each edge of the cube is 1.0 m. The unidevelop electrical field has actually a magnitude of 5.0 × 108 N/C and also passes with the left and also appropriate sides of the cube perpendicular to the surface. What is the complete electric flux that passes through the cubical Gaussian surface?
What is the electrical flux passing with a Gaussian surconfront that surrounds a +0.075 C suggest charge?
A unidevelop electrical field with a magnitude of 125 000 N/C passes through a rectangle via sides of 2.50 m and also 5.00 m. The angle in between the electrical field vector and the vector normal to the rectangular airplane is 65.0°. What is the electric flux via the rectangle?
A right, copper wire has a size of 0.50 m and also an excess charge of -1.0 × 10-5 C dispersed uniformly along its size. Find the magnitude of the electrical field at a suggest situated 7.5 × 10-3 m from the midpoint of the wire.
A total charge of -6.50 µC is uniformly distributed within a spbelow that has actually a radius of 0.150 m. What is the magnitude and direction of the electrical field at 0.300 m from the surface of the sphere?
A circular loop of wire with a diameter of 0.626 m is rotated in a unidevelop electrical field to a position where the electrical flux via the loop is a maximum. At this position, the electric flux is 7.50 × 105 N×m2/C. Determine the magnitude of the electric area.
A helium nucleus is located in between the plates of a parallel-plate capacitor as displayed. The nucleus has actually a charge of +2e and a mass of 6.6 × 10-27 kg. What is the magnitude of the electrical area such that the electric pressure precisely balances the weight of the helium nucleus so that it continues to be stationary?
Two identical conducting spheres bring charges of +5.0 mC and -1.0 mC, respectively. The centers of the spheres are initially separated by a distance L. The 2 spheres are lugged together so that they are in contact. The spheres are then went back to their original separation L. What is the ratio of the magnitude of the electric force on either sphere after the spheres are touched to that before they were touched?
Determine the excess charge on the inner surchallenge of the external sphere (a distance b from the center of the system).
Determine the excess charge on the external surchallenge of the outer spbelow (a distance c from the center of the system).
Which one of the following figures shows a qualitatively exact sketch of the electrical area lines in and approximately this system?
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