1: Define the term "electrical resistance"
2: a} State Ohm's law.
b} What does the term "potential difference" mean when applied to an electric circuit?
c} Explain why it's reasonable to consider the terms "voltage drop" and "potential difference" to be equivalent to one another.
3} For a given voltage drop, what would happen to the electric current through the resistance if the value of the resistance was a. doubled, b. halved, and c. 5 times as large?
4.What is a "short circuit" and why is it considered to be a safety hazard?
5. Calculate the voltage drop across the following electrical loads:
a. A resistance of 500 Ω that has a current of 1.4 A flowing through it?
b} a resistance of 39 Ω that has a current of 0.58 A flowing through it?
c} A resistance of 15000 Ω which has a current of 0.08 A flowing through it?
2007-01-09 13:00:09 · 7 answers · asked by Anonymous in Education & Reference ➔ Homework Help
Thank You very much Tim R
I will give you 10 points after 3 hours!
May God Bless You
Have a great night!
2007-01-09 13:49:26 · update #1
You know, this really isn't worth it for 10 points.
1. Electrical resistance is the property a material has to resistance of flow of electricity through it.
2a. Ohm's Law states that voltage is equal to current times resistance. E=IR.
2b. potential difference is the total voltage in a circuit when referencing ground, or zero potential.
2c. Voltage drop and potential difference are equivalent because each references ground, which is zero potential, and zero volts.
3. E=IR so, a. if resistance is doubled, current is cut in half. b. If resistance is halved, current is doubled. c. If resistance is 5 times as large, resistance is one fifth its initial value.
4. A short circuit is one that has no resistance, so it can overheat a circuit because of excess current.
E=IR
5a. Voltage drop =1.4*500* =700 volts
5b. Voltage drop =.58*39 =22.62 volts
5c. Voltage drop =.08*15000 = 1200 volts
Hope that helps
2007-01-09 13:23:54 · answer #1 · answered by ? 3 · 1⤊ 3⤋
Homework Help means we give assistance so you can complete your assignments. It doesn't mean "doing your homework for you."
I love helping, but I am disgusted -- yes, that is the word I want to use -- by the attempts by "students" on here to get us to do your homework for you.
Look in your textbook. Get started on your own. When you hit a snag, come back and ask a specific question or ask for some clarification.
What kind of life do you envision for yourself? It starts with being a student, which means you STUDY. It always includes integrity.
Find your integrity. Use your brain. Do your own homework.
NOTE TO TIM R (just below me:) WHAT are you doing? It takes a village, you know. You aren't helping, you are enabling.
2007-01-09 13:14:45 · answer #2 · answered by Pamela B 5 · 1⤊ 0⤋
Just guess. I'm not going to tell you to "do your homework" or "get a life", because I'm not your mom or whatever. All you have to do is try your best and see what your teacher/tutor says.
2007-01-09 13:13:25 · answer #3 · answered by Anonymous · 1⤊ 0⤋
Now, that's just sad. Don't you want to learn? Learn this stuff and you can confidently install lighting fixtures in your house and more.
2007-01-09 13:07:38 · answer #4 · answered by cassandra 6 · 1⤊ 0⤋
do your own work. are you serious? get a freakin tutor.
you could have looked all this sh*t up in the time it took you to post it.
2007-01-09 13:07:50 · answer #5 · answered by Anonymous · 1⤊ 0⤋
Do your own homework. Post again if you actually want HELP.
2007-01-09 13:03:43 · answer #6 · answered by Anonymous · 1⤊ 0⤋
ROFLwTIME
2007-01-09 13:07:46 · answer #7 · answered by Thermos 2 · 0⤊ 0⤋