Introduction:
There are three parts to todays lab: the first is to determine whether or not a
light bulb is ohmic, the second is to verify Kirchhoffs loop rule, and the third is to
verify Kirchhoffs junction rule. The purpose of todays lab is to learn abo
Lab #6
e/m: Charge-to-mass ratio of the electron
Page 1 of 3
Lab Description
In todays lab, we will determine the charge-to-mass ratio (e/m) of the electron.
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Lab #5: Resistance
Introduction
In this lab, we want to find out what factors affect resistance. The lab requires us to
choose factors to test and to test the differences in voltage and current that the factors create. To
do this we need to use a set up o
Page 1 of 3
Lab #1
Shocked! The Nature of Charge
Lab Description
Today, you are going to come up with a model of charge based on the experimental evidence you can gather using the materials
provided.
Learning Goals
1. To develop an intuitive understanding
1) A description of your experiment (Design + Hypotheses)
Step 1: Verifying Kirkoffs laws
Two Resistors in Series: We connected two resistors in series. The negative and positive
terminals of the battery, set at 5 V, were connected to each end of the circ
Rosalind Dempsey
9/12/12
Lab 1: Shocked! The Nature of Charge
Model of Electric Charge:
In this lab we rubbed different types of fabrics against different types of rods and
subsequently measured the charge on the rods using the Braun electroscope, pith ba
Lab 6: e/m: Charge to mass ratio of the electron
Introduction
In this lab, we explore the charge to mass ratio of the electron. To understand this
concept, we derive the equation for the charge to mass ratio, using our understanding of force
and electric
Rosalind Dempsey
10/10/12
Lab 5: DC Circuits Ohms Law and Kirchhoffs Laws
Description of Experiment:
For this lab we strove to prove Ohms Law and Kirchhoffs Laws for a circuit in which
the resistors were in parallel and a circuit for which they were in se
Rosalind Dempsey
11/28/12
Lab 11: Diffraction by Biological Specimen
Part 1: Diffraction Grating
Q1: dsin()=n
X2+L2=h2
H=
sin()=xn/
d(xn/
)=n =6.328x10-7
d=n
)/xn
N
-1 left
1 right
-2 left
2 right
-3 left
3 right
Average
Standard Deviation
Q2:
Xn
.0285
.0
Rosalind Dempsey
11/7/12
Lab 9: AC Circuits
1. To start out the settings on the oscilloscope were 2 volts and 1 millisecond. When the 100 Hz
wave was input into the oscilloscope, the oscilloscope produced a wave of about 99.6 Hz and
amplitude of 5.68 Volt
Rosalind Dempsey
10/24/12
Lab 6: Charge to Mass Ratio of the Electron
Q1: We are measuring e/m as opposed to the individual quantities because the mass and charge are too
small to measure on their own. The accepted value for charge is 1.602 x 10-19 C and
Rosalind Dempsey
9/26/12
Lab #3 Distance-Dependence of Radiation
Questions
Q1. Y=axb
Lny=lna+lnxb
Lny=blnax
B+lna =lny/lnx (slope)
Slope does not depend on units because slope is found by dividing the natural log of the values, which
eliminates the units
Rosalind Dempsey
9/19/12
Lab #2 Visualizing the Electric field
Hypotheses on the electric fields
The initial guess of the field lines for the circle sheet consisted of the center ring being positively charged
and the outer ring being negatively charged, w
J OHNS H OPKINS U NIVERSITY, P HYSICS AND A STRONOMY
AS.173.112 G ENERAL P HYSICS L ABORATORY II
Syllabus Spring 2017
Webpage and Course Manual:
Required Textbook:
Co-requisites:
1
John R. Taylor, An Introduction to Error Analysis, 2nd ed.
(University Sci
J OHNS H OPKINS U NIVERSITY, P HYSICS AND A STRONOMY
AS.173.112 G ENERAL P HYSICS L ABORATORY II
DC Circuits - Ohms and Kirchhoffs Laws
1
I NTRODUCTION
Direct current (DC) circuits are ubiquitous. Most battery-powered electronic machines like flashlights,
J OHNS H OPKINS U NIVERSITY, P HYSICS AND A STRONOMY
AS.173.112 G ENERAL P HYSICS L ABORATORY II
The Resistance of a Path
1
L AB D ESCRIPTION
This lab explores the effect that geometry has on the resistance of a sample.
2
L EARNING O BJECTIVES
At the conc
Introduction:
The purpose of todays lab is to analyze the behavior of a simple AC circuit,
the RC circuit, in order to learn why circuit components behave differently when the
voltage varies in time. Time-dependent signals will be captured through
oscillo
Introduction:
The purpose of todays lab is to determine the charge-to-mass ratio of the
electron and reinforce force and energy concepts for charged particles. This is done
using an e/m apparatus with Helmholtz Coils.
Procedure:
The two rings provided in
Introduction:
Geometric optics is the study of the properties of light. Light moves in straight lines
as explained by the wave theory of light by Maxwell. However, light easily bends when
moving through other materials besides air. The goal of todays lab
Introduction:
The purpose of todays lab is to explore the effect of various factors on the
resistance of a path. Resistance varies depending on the size and shape of a resistor.
In this lab, different geometry of shapes will be tested as well as length. R
Introduction:
Electromagnetic induction is defined as the production of an electric current
moving through a magnetic field. Induction happens via conservation of energy the
change in the flux gives rise to a voltage in the current loop, which causes the
Introduction:
The purpose of this experiment is to create a model of charges using an
electroscope, balloon, pith balls, and different rods and cloths made of different materials.
Procedure:
The experiment provides various types of rods and cloths that co
Rosalind Dempsey
Lab 4: What Factors Affect a Paths Resistance
Introduction:
The purpose of this lab was to test factors that may affect the resistance of a path. One of the
equations that are used to find resistance is R l/A, where is resistivity, a char
Introduction:
The objective of this lab is to explore the nature of the electric field created by
charges by relating the electric potential to the field and explaining the relationship
between the potential and the electric field. Through the exploration
Lab 10: Geometric Optics Making a Telescope
Introduction
In this lab, we explored the basics of geometric optics, specifically reflection and
refraction. To do this we conducted a series of experiments, including the construction of a
telescope, applying