Inquiry into Physics
Inquiry into Physics
8th Edition
ISBN: 9781337515863
Author: Ostdiek
Publisher: Cengage
bartleby

Concept explainers

Question
Book Icon
Chapter 7, Problem 33Q
To determine

The ranking of the force on each point charges q1 and q2 in the given pairings from the most attractive to most repulsive. The separation, d, between each pair is given. Explain the reasoning you used to arrive at your rankings.

Pair 1:q1=+2 µC;q2= 4 µC and d= 10 cm Pair 2:q1=+2 µC;q2= 2 µC and d= 5 cm Pair 3:q1=+3 µC;q2= +3 µC and d= 10 cm Pair 4:q1=5 µC;q2= 2 µC and d= 20 cm.

Expert Solution & Answer
Check Mark

Answer to Problem 33Q

Pair 2:F=14.4 N; attractivePair 1:F= 7.2 N; attractivePair 4:F=2.25N; repulsivePair 3:F=8.1 N; repulsive.

Explanation of Solution

Given:

Pair 1:q1=+2 µC;q2= 4 µC and d= 10 cm Pair 2:q1=+2 µC;q2= 2 µC and d= 5 cm Pair 3:q1=+3 µC;q2= +3 µC and d= 10 cm Pair 4:q1=5 µC;q2= 2 µC and d= 20 cm

Concept Used:

Force between two charges is given by Coulomb’s law:

F=Kq1×q2d2

Where, K= 9×109Nm2C-2.

Calculation:

Substitute the given values in the formula F=Kq1×q2d2, we get

Pair 1:F=(9×109)×2×106×4×106(10×102)2 = 7.2 N; attractive force (since the charges have opposite sign)

Pair 2:F=9×109×2×106×2×106(5×102)2= 14.4 N ; attractive force (since the charges have opposite sign)

Pair 3:F=9×109×3×106×3×106(10×102)2= 8.1 N ; repulsive force (since the charges have same sign)

Pair 4:F=9×109×5×106×2×106(20×102)2=2.25 N ; repulsive force (since the charges have same sign)

So, the order is: pair 2 - pair 1 - pair 4 - pair 3.

Conclusion:

The order from the most attractive to most repulsive is: pair 2 - pair 1 - pair 4 - pair 3.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Q1
2.
Final answers should be in two decimal places only. Include proper substitution and cancellation of units. An electron is placed in a uniform electric field of (given E) directed north created by two horizontal parallel plates that are (given distance) apart. The electron accelerates from rest, starting at the negative plate. What is the net force and acceleration acting on the electron? How long did it take the electron to get from one side of the plate to the other? Given: Electri field (nN/C): 30 Distance (fm): 133

Chapter 7 Solutions

Inquiry into Physics

Ch. 7 - Prob. 4QCh. 7 - Prob. 5QCh. 7 - (Indicates a review question, which means it...Ch. 7 - Prob. 7QCh. 7 - Prob. 8QCh. 7 - Prob. 9QCh. 7 - Prob. 10QCh. 7 - Prob. 11QCh. 7 - Prob. 12QCh. 7 - (Indicates a review question, which means it...Ch. 7 - Prob. 14QCh. 7 - (Indicates a review question, which means it...Ch. 7 - Prob. 16QCh. 7 - (Indicates a review question, which means it...Ch. 7 - (Indicates a review question, which means it...Ch. 7 - Prob. 19QCh. 7 - (Indicates a review question, which means it...Ch. 7 - (Indicates a review question, which means it...Ch. 7 - (Indicates a review question, which means it...Ch. 7 - (Indicates a review question, which means it...Ch. 7 - Prob. 24QCh. 7 - Prob. 25QCh. 7 - (Indicates a review question, which means it...Ch. 7 - (Indicates a review question, which means it...Ch. 7 - (Indicates a review question, which means it...Ch. 7 - Prob. 29QCh. 7 - (Indicates a review question, which means it...Ch. 7 - (Indicates a review question, which means it...Ch. 7 - Prob. 32QCh. 7 - Prob. 33QCh. 7 - Prob. 34QCh. 7 - (Indicates a review question, which means it...Ch. 7 - Two charged particles exert an electric force of...Ch. 7 - What would the separation between two identical...Ch. 7 - A particle having a positive charge of C...Ch. 7 - During 30 seconds of use, 250 C of charge flow...Ch. 7 - A lightning stroke lasts 0.05 s and involves a...Ch. 7 - A current of 0.7 A goes through an electric motor...Ch. 7 - A calculator draws a current of 0.0001 A for 5...Ch. 7 - Prob. 8PCh. 7 - A 120-V circuit in a house is equipped with a 20-A...Ch. 7 - . The resistance of each brake lightbulb on an...Ch. 7 - . The lightbulb used in a computer projector has a...Ch. 7 - Prob. 12PCh. 7 - Prob. 13PCh. 7 - Prob. 14PCh. 7 - . An electric eel can generate a 400-V, 0.5-A...Ch. 7 - . An electric train operates on 750 V. What is its...Ch. 7 - . All of the electrical outlets in a room are...Ch. 7 - . Your cell phone typically consumes about 400 mW...Ch. 7 - . A car’s headlight consumes 40 W when on low beam...Ch. 7 - . Find the current that flows in a 40-W bulb used...Ch. 7 - . An electric clothes dryer is rated at 4,000 W....Ch. 7 - . A clock consumes 2 W of electrical power. How...Ch. 7 - . Which costs more, running a 1,200-W hair dryer...Ch. 7 - . A representative lightning strike is caused by a...Ch. 7 - Prob. 25PCh. 7 - . A certain electric motor draws a current of 10 A...Ch. 7 - . The generator at a large power plant has an...Ch. 7 - . A lightbulb is rated at 60 W when connected to...Ch. 7 - . About 40,000 J of energy is stored in a typical...Ch. 7 - . An electric car is being designed to have an...Ch. 7 - Prob. 31PCh. 7 - Compute the electric force acting between the...Ch. 7 - Use the result from Challenge land the equation...Ch. 7 - Prob. 3CCh. 7 - Using your understanding of the nature of internal...Ch. 7 - The current that flows through an incandescent...Ch. 7 - Prob. 6CCh. 7 - Imagine a company offering a line of hair dryers...Ch. 7 - Prob. 8CCh. 7 - Combine Ohm’s law and the equation for power...Ch. 7 - A defibrillator sends approximately 0.1 C of...
Knowledge Booster
Background pattern image
Physics
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
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Inquiry into Physics
Physics
ISBN:9781337515863
Author:Ostdiek
Publisher:Cengage