Answered: At some automobile toll booths, a thin…

At some automobile toll booths, a thin metal wire protrudes from the road, making contact with cars before they reach the toll collector. What is the purpose of this wire?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter19: Electric Forces And Electric Fields

Section: Chapter Questions

Problem 14CQ

See similar textbooks

Related questions

Q: When a glass rod is rubbed against silk, which of the following statements is true? a. Electrons…

A: The correct option, When a glass rod is rubbed against silk, which of the following statements is…

Q: The electric charge on an electron is A) the same as a neutron. b) the same as on a…

Q: what should happen to the diameter of the wireas the load on the wire is increased? why?

A: Volume of the wire remains constant therefore as the load on the wire increases, its length gets…

Q: An object has a positive electric charge whenever a. it has more protons than electrons b.…

A: object has a positive electric charge whenever it has more protons than electrons. Because the…

Q: A negatively charged rod is brought close to a neutral conductor hanging on an insulated string.…

A: Solution- (1) The ball would be attracted towards to rod. (2) Charging by induction

Q: If an object is negatively charged ... it has as many protons as electrons it has…

A: Answer is Option (D) it has excess electrons. The number of electrons present in the object…

Q: Why does a balloon stick to your sweater?

A: If balloon rub with sweater, electron transfers on sweater hence it becomes negatively charged and…

Q: If charges given to body are +5; -2; -3 units successively, the net charge on the body will be O +2…

Q: What will happen to the electric force between two charges if we maintain the amount of charge on…

A: Q-1 ANSWER -OPTION B

Q: As an object acquires a positive charge, its mass usually(a) decreases.(b) increases.(c) stays the…

A: Solution:- Option (A) is correct

Q: A positive object touches a neutral electroscope, and the leaves separate. Then a negative object is…

A: Answer:- (c) They move closer together. Because A positive object touches a neutral electroscope,…

Q: A heart defibrillator delivers 4.00×102 J of energy by discharging a capacitor initially at 1.00×104…

A: Given: Energy, E = 4.00×102 J voltage,V = 1.00×104 V

Q: O Two south poles are facing each other Two north poles are facing each other A north pole is facing…

A: From the diagram, we can see that the magnetic field lines of the magnetic are turning away from…

Q: The force between two charged objects drop off as distance squared 1 over the distance…

A: The expression for the forces between two charged objects is F=kQ1Q2r2 so, which can be written as F…

Q: A positive charge and a negative charge held near each other are released. As they move, the force…

A: The force of repulsion or attraction can be represented as, Here, k, q, and r represent the…

Q: What happens when a charged insulator is placed near an uncharged metallic object? Select one: a.…

A: Answer: Option a) Explanation: When a charged insulator is placed near an uncharged metallic…

Q: A positive electric charge a. attracts other positive charges b. repels other positive…

A: CORRECT option is B(repel other positive charge)

Q: A wire is stretched between two poles 28.0m apart. A sign is attached at the midpoint of the wire…

Q: Why does a shirt or blouse taken from a clothes dryersometimes cling to your body?

A: When the clothes are mixed and dropped in the dryer, then they will rub each other and creates a…

Q: The electric charge on an electron is the same as that of a hydrogen atom. the same…

Q: Objects become electrostatically charged when neutrons move from one object to another protons move…

A: The electronic charge is known as the fundamental charge. The charge of any object in the universe…

Q: The force between two charges q1 and q2, separated by a distance d, is 20 mN. If the distance…

A: Given, force F1 =20 mN

Q: Why is a small gap left between railroad tracks instead of welding them together

A: A small gap is left between railroad tracks .

Q: If you rub an inflated balloon against your hair and place it against a door, by what mechanism does…

A: When we rub an inflatted balloon with our hair, surface of balloon gets charged. This is called…

Q: We are usually not aware of the electric force acting between two everyday objects because the…

A: The electric force exist between two charged particles.Since, in our daily life objects are neutral…

Q: A proton at position 'A' would go and an electron at 'B' would go North West East В South O West…

A: The proton and electron both will attract each other because they both are of the opposite polarity.…

Q: A negatively charged balloon is brought near a metal can that rests on a wood table. The side of the…

A: The can is positively charge by this approach. So answer is 1.

Q: Why are objects easily charged by induction? a. Protons are easily flowing from one object to…

A: The charged object that is brought near will always repel like charges and attract opposite charges.…

Q: Why do some clothes cling together after being removed from the clothes dryer? Does this happen if…

A: The clothes are in continuous motion inside a dryer and they tumble upon each other continuously.…

Q: Modified True or False. Write True if the statement is true, otherwise write False and change the…

A: 1) Benjamin Franklin proposed the one-fluid theory of electricity. TRUE

Q: An object with an imbalance of electrons and neutrons is electrically charged. True False

A: An object can be electrically charged or neutral. Positively charged objects : Objects having more…

Q: Your clothing tends to cling together after going through the dryer. Why? Would you expect more or…

Q: . high number of electrons on the doorknob. B. discharge of an imbalance of electrons. C. highly…

A: John Travoltage has a negative charge on him that means he has an imbalance of negatively charged…

Q: Your clothing tends to cling together after going through the dryer. Why? Would you expect more or…

A: The clothes cling together after spinning in a dryer because clothes are rubbing to each other in a…

Q: When you walk across a nylon rug and then touch a large metal object, you may get a spark and a…

A: When we rub a body against an object, then the body will get negatively charged. This negative…

Q: A proton and an electron are released from rest a few centimeters apart, far from any other objects.…

A: According to conservation of energy: T=K.E+P.E Here, T is the total energy, K.E is the kinetic…

Q: What is static electricity? А. Electricity that flows in one direction В. Electricity that is sent…

A: When two objects are rubbed together, bhoot acquires electrical charge on the surface, this charge…

Q: What will happen if the balloon is rubbed into a piece of cloth and put the balloon a short distance…

A: If we rub a balloon with a cloth piece, the electrons from the cloth piece move into the balloon.…

Q: why do moviegoers experince electric shock when they touch the metal doorknob after walking on the…

A: Question : Why do movie goers experience electric shock when they touch the metal doorknob after…

Q: Lightning occurs when there is a flow of electric charge (principally electrons) between the ground…

A: Given- Flow of charge (r) = 20000 C/s Time (t) = 100 μs = 100 x 10-6 s

Q: What happens when a charged insulator is placed near an uncharged metallic object? (a) They repel…

A: as the charged insulator placed near a metal, the charged electrons inside the metal attract towards…

Question

At some automobile toll booths, a thin metal wire protrudes from the road, making contact with cars before they reach the toll collector. What is the purpose of this wire?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

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

An object with negative charge is placed in a region of space where the electric field is directed vertically upward. What is the direction of the electric force exerted on this charge? (a) It is up. (b) It is down. (c) There is no force. (d) The force can be in any direction.
Why is a golfer with a metal dub over her shoulder vulnerable to lightning in an open fairway? Would she be any safer under a tree?
Check Your Understanding Verify that /V and e0/d have the same physical units.
Suppose a woman carries an excess charge. To maintain her charged status can she he standing on just any pair of shoes? How would you discharge her? What are the consequences if she simply walks away?
The immediate cause of many deaths is ventricular fibrillation, an uncoordinated quivering of the heart, as opposed to proper beating. An electric shock to the chest can cause momentary paralysis of the heart muscle, after which the heart will sometimes start organized beating again. A defibrillator is a device that applies a strong electric shock to the chest over a time of a few milliseconds. The device contains a capacitor of a few microfarads, charged to several thousand volts. Electrodes called paddles, about 8 cm across and coated with conducting paste, are held against the chest on both sides of the heart. Their handles are insulated to prevent injury to the operator, who calls Clear! and pushes a button on one paddle to discharge the capacitor through the patient's chest Assume an energy of 3.00 102 W s is to be delivered from a 30.0-F capacitor. To what potential difference must it be charged?
Some devices often used in bathrooms, such as hairdryers, often have safety messages saying “Do not use when the bathtub or basin is full of water." Why is this so?
The first Leyden jar was probably discovered by a German clerk named E. Georg von Kleist. Because von Kleist was not a scientist and did not keep good records, the credit for the discovery of the Leyden jar usually goes to physicist Pieter Musschenbroek from Leyden, Holland. Musschenbroek accidentally discovered the Leyden jar when he tried to charge a jar of water and shocked himself by touching the wire on the inside of the jar while holding the jar on the outside. He said that the shock was no ordinary shock and his body shook violently as though he had been hit by lightning. The energy from the jar that passed through his body was probably around 1 J, and his jar probably had a capacitance of about 1 nF. a. Estimate the charge that passed through Musschenbroeks body. b. What was the potential difference between the inside and outside of the Leyden jar before Musschenbroek discharged it?
Three objects are brought close to one another, two at a time. When objects A and B are brought together, they attract. When objects B and C are brought together, they repel. Which of the following are necessarily true? (a) Objects A and C possess charges of the same sign. (b) Objects A and C possess charges of opposite sign. (c) All three of the objects possess charges of the same sign. (d) One object is neutral. (e) Additional experiments must be performed to determine information about the charges on the objects.