Physics for Scientists and Engineers, 4th Ed + Masteringphysics: Chapters 1-38
4th Edition
ISBN: 9780136139263
Author: Douglas C. Giancoli
Publisher: PEARSON EDUCATION (COLLEGE)
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 21, Problem 80GP
A large electroscope is made with “leaves” that are 78-cm-long wires with tiny 24-g spheres at the ends. When charged, nearly all the charge resides on the spheres. If the wires each make a 26° angle with the vertical (Fig. 21–72), what total charge Q must have been applied to the electroscope? Ignore the mass of the wires.
FIGURE 21–72
Problem 80.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
How many excess electrons must be placed on each of two small spheres spaced 3cm apart if the speheres are to have equal charge and if the force of repulsion between them is to be 10^-19N?
Two charges are placed on the x-axis: +3.0 uC at x = 0 and -5.0 uC at x = 40cm. Where must a third charge be
placed f the force it experiences if to be zero?
Two metal spheres, one carrying a 8.0-μC charge and the other carrying a -21-μC charge, are initially 100 mm apart. They are brought in contact with each other and then moved back to their original positions.
What is the numerical value of the ratio FEi /FEfFiE/ FfE, where FEiFiE is the magnitude of the electric force between the spheres before they are brought in contact and FEfFfE is the magnitude of that force after they are brought together and then moved back to their initial positions?
Chapter 21 Solutions
Physics for Scientists and Engineers, 4th Ed + Masteringphysics: Chapters 1-38
Ch. 21.5 - Return to the Chapter-Opening Question, page 559,...Ch. 21.5 - What is the magnitude of F12 (and F21) in Example...Ch. 21.5 - Determine the magnitude and direction of the net...Ch. 21.5 - (a) Consider two point charges of the same...Ch. 21.6 - Four charges of equal magnitude, but possibly...Ch. 21 - If you charge a pocket comb by rubbing it with a...Ch. 21 - Why does a shirt or blouse taken from a clothes...Ch. 21 - Explain why fog or rain droplets tend to form...Ch. 21 - A positively charged rod is brought close to a...Ch. 21 - Why does a plastic ruler that has been rubbed with...
Ch. 21 - Contrast the net charge on a conductor to the free...Ch. 21 - Figures 217 and 218 show how a charged rod placed...Ch. 21 - When an electroscope is charged, the two leaves...Ch. 21 - The form of Coulombs law is very similar to that...Ch. 21 - We are not normally aware of the gravitational or...Ch. 21 - Is the electric force a conservative force? Why or...Ch. 21 - What experimental observations mentioned in the...Ch. 21 - When a charged ruler attracts small pieces of...Ch. 21 - Explain why the test charges we use when measuring...Ch. 21 - When determining an electric field, must we use a...Ch. 21 - Draw the electric field lines surrounding two...Ch. 21 - Assume that the two opposite charges in Fig. 2134a...Ch. 21 - Consider the electric field at the three points...Ch. 21 - Why can electric field lines never cross?Ch. 21 - Given two point charges, Q and 2Q, a distance ...Ch. 21 - Suppose the ring of Fig. 2128 has a uniformly...Ch. 21 - Consider a small positive test charge located on...Ch. 21 - We wish to determine the electric field at a point...Ch. 21 - In what ways does the electron motion in Example...Ch. 21 - Describe the motion of the dipole shown in Fig....Ch. 21 - Explain why there can be a net force on an...Ch. 21 - (I) What is the magnitude of the electric force of...Ch. 21 - (I) How many electrons make up a charge of 38.0 C?Ch. 21 - (I) What is the magnitude of the force a + 25 C...Ch. 21 - (I) What is the repulsive electrical force between...Ch. 21 - (II) When an object such as a plastic comb is...Ch. 21 - (II) Two charged dust particles exert a force of...Ch. 21 - (II) Two charged spheres are 8.45 cm apart. They...Ch. 21 - (II) A person scuffing her feet on a wool rug on a...Ch. 21 - (II) What is the total charge of all the electrons...Ch. 21 - (II) Compare the electric force holding the...Ch. 21 - (II) Two positive point charges are a fixed...Ch. 21 - (II) Particles of charge +75, +48, and 85 C are...Ch. 21 - (II) Three charged particles are placed at the...Ch. 21 - (II) Two small nonconducting spheres have a total...Ch. 21 - (II) A charge of 4.15 mC is placed at each corner...Ch. 21 - (II) Two negative and two positive point charges...Ch. 21 - (II) A charge Q is transferred from an initially...Ch. 21 - (III) Two charges, Q0 and 4Q0, are a distance ...Ch. 21 - (III) Two positive charges +Q are affixed rigidly...Ch. 21 - (III) Two small charged spheres hang from cords of...Ch. 21 - (I) What are the magnitude and direction of the...Ch. 21 - (I) A proton is released in a uniform electric...Ch. 21 - (I) Determine the magnitude and direction of the...Ch. 21 - (I) A downward electric force of 8.4 N is exerted...Ch. 21 - (I) The electric force on a +4.20-C charge is...Ch. 21 - (I) What is the electric field at a point when the...Ch. 21 - (II) Draw, approximately, the electric field lines...Ch. 21 - (II) What is the electric field strength at a...Ch. 21 - (II) A long uniformly charged thread (linear...Ch. 21 - (II) The electric field midway between two equal...Ch. 21 - (II) Calculate the electric field at one corner of...Ch. 21 - (II) Calculate the electric field at the center of...Ch. 21 - (II) Determine the direction and magnitude of the...Ch. 21 - (II) Two point charges, Q1 = 25 and Q2 = +45 ,...Ch. 21 - (II) A very thin line of charge lies along the x...Ch. 21 - (II) (a) Determine the electric field E at the...Ch. 21 - (II) Draw, approximately, the electric field lines...Ch. 21 - (II) Two parallel circular rings of radius R have...Ch. 21 - (II) You are given two unknown point charges, Q1...Ch. 21 - (II) Use Coulombs law to determine the magnitude...Ch. 21 - (II) (a) Two equal charges Q are positioned at...Ch. 21 - (II) At what position, x = xM, is the magnitude of...Ch. 21 - (II) Estimate the electric field at a point 2.40...Ch. 21 - (II) The uniformly charged straight wire in...Ch. 21 - (II) Use your result from Problem 46 to find the...Ch. 21 - (II) Determine the direction and magnitude of the...Ch. 21 - (II) A thin rod bent into the shape of an arc of a...Ch. 21 - (III) A thin glass rod is a semicircle of radius...Ch. 21 - (III) Suppose a uniformly charged wire starts at...Ch. 21 - (III) Suppose in Example 2111 that x = 0.250m. Q =...Ch. 21 - (III) A thin rod of length carries a total charge...Ch. 21 - (III) Uniform plane of charge. Charge is...Ch. 21 - (III) Suppose the charge Q on the ring of Fig....Ch. 21 - (II) An electron with speed v0 = 27.5 106 m/s is...Ch. 21 - (II) An electron has an initial velocity...Ch. 21 - (II) An electron moving to the right at 7.5 105...Ch. 21 - (II) At what angle will the electrons in Example...Ch. 21 - (II) An electron is traveling through a uniform...Ch. 21 - (II) A positive charge q is placed at the center...Ch. 21 - (II) A dipole consists of charges +e and e...Ch. 21 - (II) The HCl molecule has a dipole moment of about...Ch. 21 - (II) Suppose both charges in Fig. 2145 (for a...Ch. 21 - (II) An electric dipole, of dipole moment p and...Ch. 21 - (III) Suppose a dipole p is placed in a nonuniform...Ch. 21 - (III) (a) Show that at points along the axis of a...Ch. 21 - How close must two electrons be if the electric...Ch. 21 - Given that the human body is mostly made of water,...Ch. 21 - A 3.0-g copper penny has a positive charge of 38...Ch. 21 - Measurements indicate that there is an electric...Ch. 21 - (a) The electric field near the Earths surface has...Ch. 21 - A water droplet of radius 0.018 mm remains...Ch. 21 - Estimate the net force between the CO group and...Ch. 21 - Suppose that electrical attraction, rather than...Ch. 21 - In a simple model of the hydrogen atom, the...Ch. 21 - A positive point charge Q1 = 2.5 105 C is fixed...Ch. 21 - When clothes are removed from a dryer, a 40-g sock...Ch. 21 - A small lead sphere is encased in insulating...Ch. 21 - A large electroscope is made with leaves that are...Ch. 21 - Dry air will break down and generate a spark if...Ch. 21 - Two pint charges, Q1 = 6.7 and Q2 = 1.8 C, are...Ch. 21 - Packing material made of pieces of foamed...Ch. 21 - One type of electric quadrupole consists of two...Ch. 21 - Suppose electrons enter a uniform electric field...Ch. 21 - An electron moves in a circle of radius r around a...Ch. 21 - Three very large square planes of charge are...Ch. 21 - A point charge (m = 1.0 g) at the end of an...Ch. 21 - Four equal positive point charges, each of charge...Ch. 21 - Two small, identical conducting spheres A and B...Ch. 21 - A point charge of mass 0.210 kg, and net charge...Ch. 21 - A one-dimensional row of positive ions, each with...Ch. 21 - (III) A thin ring-shaped object of radius a...Ch. 21 - (III) An 8.00 C charge is on the x axis of a...
Additional Science Textbook Solutions
Find more solutions based on key concepts
Show that =3a , by calculating the infinitesimal change in volume dT of a cube with sides of length L when the ...
University Physics Volume 2
3. What is free-fall, and why does it make you weightless? Briefly describe why astronauts are weightless in th...
The Cosmic Perspective (8th Edition)
3. A woman wearing spiked shoes pushes two crates across her frictionless. horizontal studio floor. (See Figure...
College Physics (10th Edition)
21.9 Two small plastic spheres are given positive electric charges. When they are 15.0 cm apart, the repulsive ...
University Physics with Modern Physics (14th Edition)
3.5 A jet plane is flying at a constant altitude. At time t1 = 0, it has components of velocity vx = 90 m/s, vy...
University Physics (14th Edition)
The Human Power to Destroy. We may have the ability to destroy ourselves today, perhaps as the result of nuclea...
Life in the Universe (4th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- If a point charge is released from rest in a uniform electric field, will it follow a field line? Will it do so if the electric field is not uniform?arrow_forwardCan you arrange the two point charges q1=2.0106C and q2=4.0106C along the x-axis so that E=0 at the origin?arrow_forwardHow many coulombs of positive charge are there in 4.00 kg of plutonium given its atomic mass is 244 and that each plutonium atom has 94 protons?arrow_forward
- Check Your Understanding What angle should there be between the electric field and the surface show in Figure 6.11 in the previous example so that no electric flux passes through the surface?arrow_forwardA rod 14.0 cm long is uniformly charged and has a total charge of 22.0 C. Determine (a) the magnitude and (b) the direction of the electric field along the axis of the rod at a point 36.0 cm from its center.arrow_forwardCheck Your Understanding What is the electric field due to a single point particle?arrow_forward
- Two thin conducting plates, each 25.0 cm on a side, are situated parallel to one another and 5.0 mm apart. If electrons are moved from one plate to the other, what is the electric field between the plates?arrow_forwardIn Fig. 21-20, a central particle of charge 2q is surrounded by a square array of charged particles, separated by either distance d or d/2 along the perimeter of the square. What are the magnitude and direc- tion of the net electrostatic force on the central particle due to the other particles? (Hint: Consideration of symmetry can greatly reduce the amount of work required here.)arrow_forwardsix fixed charged particles having same magnitude of charge of 5* 10 ^-6 C, lying in x-y plane in such a way that - q1 is lying on origin of x-y plane, +q2 at a distance of 4 cm from the origin in +ve x- axis, - q3 is at a point 8 cm from the origin in +ve x-axis, - q4 also lies at a distance of 8 cm but in - ve x-axis, +q5 and - q6 both have distance 4 cm from the origin, where - q6 makes an angle of 60° with +ve x-axis and +q5 make an angle of 60° with - ve x-axis in 2nd quadrant plane. Calculate the magnitude of force f1 on q1 due to all other charges.arrow_forward
- Two point charges, 3.080E-6 C and -1.183E-6 C, are placed 3.26 cm apart on the x axis. How far (in cm) from the positive charge is the place on the x axis where the electric field is zero?arrow_forwardFor this physics II problem its saids a 4.00 g ping pong ball is suspended from a light thread and given an electric charge. The ball is then placed in a uniform electrci field of magnitude 110,00N/C which causes the ball to swing out to an angle of 23 degrees. What is the sign and magnitude of the charge on the ball? The ball is angled to the right. If you can break this down into step that would be great. Thanks!arrow_forwardHow many excess electrons are there in -10 C of charge?arrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics Capacitor & Capacitance part 7 (Parallel Plate capacitor) CBSE class 12; Author: LearnoHub - Class 11, 12;https://www.youtube.com/watch?v=JoW6UstbZ7Y;License: Standard YouTube License, CC-BY