Register to reply

Error source in an experiment

by mich_v87
Tags: error, experiment, source
Share this thread:
Oct11-05, 12:59 PM
P: 22
hey...we've done few days ago a physics lab experiment about the equipotential lines and electric field where we used the following apparatus:
a 6-volts battery , contact switch, wooden board with spring contacts, hand probe, fixed probe,galvanometer,resistance box,wires and conducting papers

I just like to know what can be the possible error sources concerning this for me i found the following errors:

The first possible error is the unspecific reading on the galvanometer
Second, the probe is circular so we can't specify the reached point exactly since it's head is not pointed...
The third error found is that the conducting paper isn't the electric field isn't conserved

I'd like to know if what i wrote is write and please suggest some more possible errors that can be made in such an experiment

thank u
Phys.Org News Partner Science news on
Physical constant is constant even in strong gravitational fields
Montreal VR headset team turns to crowdfunding for Totem
Researchers study vital 'on/off switches' that control when bacteria turn deadly
Tom Mattson
Oct17-05, 07:30 PM
Sci Advisor
PF Gold
Tom Mattson's Avatar
P: 5,532
Sorry for the late reply. In case you're still interested, here are my comments.

When looking for sources of error in an experiment, one good thing to do is to look for simplifying assumptions in your theory. Your theoretical model most likely assumes the following:

1.) You are using an ideal galvanometer.
2.) Your wires and circuit elements have zero resistance (except for resistors of course).

In addition to that you can get errors by using nominal values of circuit element ratings, instead of measuring the ratings. For instance, in your theoretical calculations did you use "6 V" as your source voltage? Or did you take a voltmeter and actually measure the potential difference across the terminals? If you did the former, then you probably picked up some error from that.

Register to reply

Related Discussions
Error in Simple Pendulum experiment Introductory Physics Homework 5
Circuit with capacitor, current source, voltagr source... and a switch Engineering, Comp Sci, & Technology Homework 1
Possible source of error in determining gas constant Biology, Chemistry & Other Homework 2
CIRCUIT ANALYSIS: Use superposition - 2 Current source, 1 Voltage source, 4 resistors Advanced Physics Homework 6
[VHDL] Xilinx Multi-source error Electrical Engineering 1