Wire Resistance and Ohm’s Law Essay Sample

Procedure Part I Wire Resistance:
open the PhET Simulation Electricity. Magnets. and Circuits ( Resistance in a Wire. As wire length ( centimeter ) increases. the opposition ( ? ) _increases________ As wire country ( cm2 ) increases. the opposition ( ? ) _decreases_________ As wire electric resistance ( ?cm ) increases. the opposition ( ? ) _increases____ Procedure Part II: Ohm’s Law: Electricity. Magnets. and Circuits ( Ohm’s Law ma is milliamps. and _1. 000_____ milliamps peers one Ampere. • Move the potency ( Vs ) and opposition ( ohms ) skidders and observe the current ( As ) As electromotive force additions. current _increases__________ .

As opposition additions. current _decreases ( slows ) __ .
Fill out the tabular arraies below and look into your work in the simulation. ( ? pt each ) • Remember. the simulation shows milliamps.
• You should demo Amperes
V =I * R
|8. 0 V | . 01 A |800 ? | |2. 0 V | . 044 A |450 ? | |0. 2 V | . 0058 A |430 ? | |6. 9 V | . 069 A |100 ? | |6. 4 V | . 0213 A |300 ? |

Decision Questions: ( ? pt each )
1. Incandescent visible radiation bulbs have a really thin fibril that glows when hot. Thin fibrils have really / low opposition. 2. The 12V battery in your auto operates a 25 A auto stereo. What is the opposition of this stereo system? _0. 48 ? ___ 3. A “2D” Maglite torch tallies on 3. 0V. What is the current through the bulb if opposition is 15 ? ? _ . 20 amps____ 4. How many Vs must an iPod courser provide to bear down an iPod utilizing. 85 Amps at 35 ? ? _29. 75 V__________ 5. You need to purchase a long extension cord to power a stereo at your spring interruption BBQ. You need 200feet. You have a 50 foot cord that will work. You rationalize that four such 50 foot cords will make the occupation. Is this a good thought? Why or Why non? _No. because electric resistance is lost through all of the cords. When opposition is lost. the power doesn’t have the current needed to power your stereo. ___