Thanks to visit codestin.com
Credit goes to www.scribd.com

Scribd
Upload
50 views7 pages

Phy 112 Exp 1

This document provides instructions for a physics lab assignment on Coulomb's Law. The assignment has two parts: 1) measuring the electric force between two charges as the distance varies, and 2) measuring the force as one charge varies while keeping the other charge and distance constant. Students are instructed to use an online simulation and graphing software to collect data and plot graphs analyzing the relationships between force, distance, and charge to experimentally determine the electric constant.

Uploaded by

Muhammad Tanvirul Islam
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
50 views7 pages

Phy 112 Exp 1

This document provides instructions for a physics lab assignment on Coulomb's Law. The assignment has two parts: 1) measuring the electric force between two charges as the distance varies, and 2) measuring the force as one charge varies while keeping the other charge and distance constant. Students are instructed to use an online simulation and graphing software to collect data and plot graphs analyzing the relationships between force, distance, and charge to experimentally determine the electric constant.

Uploaded by

Muhammad Tanvirul Islam
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 7

Department of Mathematics and Natural Sciences

Physics -112 Lab Assignment: 01


Resources:
Link for online lab:

https://phet.colorado.edu/sims/html/coulombs-law/latest/coulombs-law_a
ll.html

List and link for the graph-plotting softwares:

● Desmos (Online): Desmos | Let's learn together.

● Graph (Offline): Download | Graph (padowan.dk)

Tutorials:
● Tutorial link for plotting in Desmos :

https://www.youtube.com/watch?v=-lIUNWVKnUY

● Tutorials link for the Graph :

How to install graph software:

https://youtu.be/e19JqLJMx3A

How to draw a curve using graph software:

https://youtu.be/QBkdzU_8vVo

How to calculate the slope of a line using graph software:

https://youtu.be/z4cMiUFu5j8
Tasks:
This activity consists of two Parts:

1. Part one: Eclectic force versus distance.


2. Part two: Electric forces versus charge.

Objectives:
1. Satisfy Coulomb’s law experimentally
2. Study the parameters that affect the electric force (distance and
charge).
3. Find experimentally the electric constant k.

Theoretical Background:
Coulomb’s Law: “The magnitude of the electric force that a particle
exerts on another is directly proportional to the product of their charges
and inversely proportional to the square of the distance between them.”
Mathematically, the magnitude of this electrostatic force FE acting on two
charged particles (q1, q2) is expressed as:

FE = kq1q2/r2

Where r is the separation distance between the charged objects and k is


a constant of proportionality, called the Coulomb constant, k = 9.0 × 109
Nm2/C2.

Part one:
To satisfy the objectives do the following steps.

1. Click on the following link and fix the charge q1 and q2 write their
values in table.1.

https://phet.colorado.edu/sims/html/coulombs-law/latest/coulombs-law_e
n.html
2. Change the distance between the two charges as shown in the table.
3. Record the force value for each distance.
4. Fill table 1 by finding r2 and 1/r2.

Table.1 : Data of Force between two charges.

q1=…………. q2=………….
r (cm) r2 (m2) 1/r2 FE (N)
(1/m2)
10
9
8
7
6
5
4
3

Part two:
To satisfy the objectives do the following steps.
1. Click on the following link and fix the charge q1 and the
distance r, write their values in the table
https://phet.colorado.edu/sims/html/coulombs-law/latest/coul
ombs-law_en.html
2. Control q1 and fix it at 5mc and fix the distance between the
two objects at 6 cm, record them in table 2.
3. Change the charge of object 2 as shown in table.2 and for
each q2 record the electric force between the two objects in
table 2.

Table.2 : Data for electric force for different charges.

q1 = 5 µ𝐶 r = 6 cm

q2 (µ𝐶) FE (N)

10

Calculations and Analysis:

Part one:
1. Plot a graph relating FE and r. comment on the graph.
2. Plot one more graph relating FE and 1/r2. Use the graph to
find the electric constant k.

3. Calculate the percentage error in k (kknown=9.0 × 109 Nm2/C2)

Note: upload graph using google form


Part two:
1. Plot a graph relating FE and q2. comments on the graph.

2. Use the graph to find the electric constant k.

3. Calculate the percentage error in k (kknown=9.0 × 109 Nm2/C2)

Note: upload graph using google form

You might also like