We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

# Wire Resistance and Ohm’s Law

The whole doc is available only for registered users

A limited time offer! Get a custom sample essay written according to your requirements urgent 3h delivery guaranteed

Order Now

Procedure Part I Wire Resistance:
open the PhET Simulation Electricity, Magnets, and Circuits ( Resistance in a Wire. As wire length (cm) increases, the resistance (Ω) _increases________ As wire area (cm2) increases, the resistance (Ω) _decreases_________ As wire resistivity (Ωcm) increases, the resistance (Ω) _increases____ Procedure Part II: Ohm’s Law: Electricity, Magnets, and Circuits ( Ohm’s Law mA is milliamps, and _1,000_____ milliamps equals one Ampere. • Move the potential (volts) and resistance (ohms) sliders and observe the current (amps) As voltage increases, current _increases__________.

As resistance increases, current _decreases (slows)__.
Fill out the tables below and check your work in the simulation. ( ½ pt each ) • Remember, the simulation shows milliamps.
• You should show Amperes
V =I * R
|8.0 V |.01 A |800 Ω | |2.0 V |.044 A |450 Ω | |0.2 V |.0058 A |430 Ω | |6.9 V |.069 A |100 Ω | |6.4 V |.0213 A |300 Ω |

Conclusion Questions: ( ½ pt each)
1. Incandescent light bulbs have a very thin filament that glows when hot. Thin filaments have very / low resistance. 2. The 12V battery in your car operates a 25 amp car stereo. What is the resistance of this stereo system? _0.48 Ω ___ 3. A “2D” Maglite flashlight runs on 3.0V. What is the current through the bulb if resistance is 15 Ω ? _.20 amps____ 4. How many volts must an iPod charger provide to charge an iPOD using .85 Amps at 35 Ω? _29.75 V__________ 5. You need to buy a long extension cord to power a stereo at your spring break BBQ. You need 200feet. You have a 50 ft cord that will work. You rationalize that four such 50 ft cords will do the job. Is this a good idea? Why or Why not? _No, because resistivity is lost through all of the cords. When resistance is lost, the power doesn’t have the current needed to power your stereo.___

##### Related Topics

We can write a custom essay

According to Your Specific Requirements

Order an essay
300+
Materials Daily
100,000+ Subjects
2000+ Topics
Free Plagiarism
Checker
All Materials
are Cataloged Well

Sorry, but copying text is forbidden on this website. If you need this or any other sample, we can send it to you via email.

By clicking "SEND", you agree to our terms of service and privacy policy. We'll occasionally send you account related and promo emails.
Sorry, but only registered users have full access

How about getting this access
immediately?

Thank You A Lot!

Emma Taylor

online

Hi there!
Would you like to get such a paper?
How about getting a customized one?

Can't find What you were Looking for?

Get access to our huge, continuously updated knowledge base

The next update will be in:
14 : 59 : 59