Ohm's law Definition and 183 Threads

Homework Statement Your task is to calculate the resistance of a simple cylindrical resistor with wires connected to the ends, such as the carbon composition resistors that are used on electronic circuit boards. Imagine that the resistor is made by squirting material whose conductivity is...

Homework Statement To understand the behavior of the current and voltage in a simple R-C circuit A capacitor with capacitance C is initially charged with charge q0. At time t=0 a resistor with resistance R is connected across the capacitor PART A Use the Kirchhoff loop rule and Ohm's...

1.What is the emf of a battery with a 0.15-ohm internal resistance if the battery delivers 1.5 A to an externally connected 5.0-ohm resistor? Given that r = 0.15 ohm , I = 1.5 ohm , R = 5 ohm. By Ohm’s law V = I ( R + r) = 1.5 (5.15) E=7.725 V Is my work/answer correct?

I had trouble with transformers and ohm's law, and discussing it with friends, I got this out of them: I feel like I need to ask because I have (numerous times) accidentally used induced EMF in the formula V=IR, and therefore, end up with a different resistance in the primary and secondary...

Ohm's law states that, in an electrical circuit, the current passing through a conductor between two points is directly proportional to the potential difference (i.e. voltage drop or voltage) across the two points, and inversely proportional to the resistance between them. The mathematical...

Homework Statement the tungsten filament of a light bulb has a resistance of .07 ohm. if the filament is 27 cm long, what is the diameter Homework Equations R= p(L/A) Area of a circular cross section = (PiD^2/4) The Attempt at a Solution R= p(L/A) A= (pL)/r...

[SOLVED] Ohm's Law Homework Statement I need to find the voltages at V1, V2, V3 in the picture, with the given information using Ohm's Law. I never have learned this stuff very well, so help would be appreciated. I'm not sure what to do... Homework Equations E = I/R The Attempt at...

i have to think of different ways to test ohms law but could only come up with using an ammeter and voltmeter..the typical experiment that is seen all over the internet. what way could i test this law using basic everyday things? and what errors could happen for the typical experiment? could...

I'm still a intermediate science student. I'm not understanding how to derive the ohm's law. can anyone help me?

Are the resistance values of resistors which measured by ohmmeter and Ohm's law equal each other. Which of them are realiby than other? Please help me!

A certain sample carries a current of 4 A when the potential difference is 2V and a current of 10 A when the potential difference is 4V. This sample: A) obeys Ohm law B) has a resistance of 0.5 ohms at 1V C) has a resistance of 2.5 ohms at 1V D) has a resistance of 2.5 ohms at 2V E) does...

According to ohm's law voltage is directly proportional to current that is if voltage get increased current also should get increased but in a transformer if voltage get increased current get decreased. so, Is a transformer is obeying ohm's law or not

I am currently stuck on these two problems dealing with ohm's law. I understand that a current is equal to 1/r(va-vb) but am lost in the question somehow. I do not know how to post the two figures so I will try my best to explain it. The figure for problem 1(a) has a 12 v car battery with the...

Hi I really have confuse about some formula I did, I'll tell u, it is made by Ohm law ok, everyone knows V= I*R the I is current and it I= C\T, C = coulomb Right and V = J \ c SO R = V \ I Ohm law R = Jt\ c2 In this formula the T if it increasing the R will increase too...

A battery charger is connected to a dead battery and delivers a current of 7.5 A for 3.5 hours, keeping the voltage across the battery terminals at 12 V in the process. How much energy is delivered to the battery? I'm not exactly sure what I am doing wrong. I understand that we have to use...

I know that according to Ohm's Law that the voltage is directly proportional to the current in a resistor. Upon examing my graph that I have calculated in class, a resistor follows Ohm's Law because the slope was a straight line. The part I am confused about is why would the slope be equal to...

Hello, I am just starting to teach myself about electronics, and am already coming up with questions my text is not answering adequately. Unfortunately I don't know anyone who I could ask as I'm not in school. Consider two 12V batteries, say a car battery and a garage door opener battery...

Why is Ohm's Law not an effective method for solving some electric circuits?

ohm's law problems. help... Research Work: What is an ideal ammeter and an ideal voltmeter? Why are voltmeters connected in parallel? Why are ammeters connected in series? Problems: answer any number that you know. thanks so much. i just neede it badly... 1.What is the potential...

Ohm's law and AC circuits/ Biots / Oscilliscope hey wasssup... i'm doing a practice final and need some help ... It's askin which is true (1) Ohm's Law is true for all materials; (2) Resistance may depend on temperature (3) REsistance may depend on current (4) Ohm's law is...

carbon filament in a light bulb does obey the ohm's law right?

If a single lamp has resistance of 3 ohms, and a second and third identical lamp is added wouldn't the second be 6, and third be 9. If a part of an electric circuit diaaipates energy at 6 when it draws a current of 3A, what voltage is impressed across it? What does 6 represent

Well, I'm quite idle in Lunar New year's holidays so I decide to do some exercises on Physics, I got stuck when solving the problem, then I tried with the suggestion on my textbook, but still, I don't understand the problem, please help me out! btw, sorry, something has gotten on LaTex or I'm...

can anyone proove that V = IR ?

Is that true? Becuase like my prof said that the resistivity of an object according to ohms law has nothing to do with certain factors when in reality it does such as current and electric field (i think) What is this field of QM called? Is it Quantum Electrodynamics? Can you suggest...

A 12.0 V battery has an internal resistance r. The measured voltage (emf of the battery) is 12.0 V. When connected to a resistor R the terminal voltage is 11.7 V and the current is 0.10 Amperes. What is the value of the external resistor R in ohm? Ok I thought the problem was simple but for...

Now, this question may be incredibly stupid, but it has been bothering me nonetheless. I figure you guys can set me straight really easily. Say you have a basic circuit loop as shown in the picture. Ohm's law: V = RI Now, according to a textbook I'm reading right now, "By Ohm's law...

Now, this question may be incredibly stupid, but it has been bothering me nonetheless. Say you have a basic circuit loop as shown in the picture. Ohm's law: V = RI Now, according to a textbook I'm reading right now, "By Ohm's law, there is no voltage across an ideal (i.e...

OHM's Law Lab this lab involved a voltmeter and an ammeter...a voltage source was turned on and sent to a resistor, from the resistor there was a current probe and a voltage probe...the idea of the lab was to give 6 readings for a resistor, each reading would exceed by .5v intervals...during...

A very quick question about Ohm's Law: When I graph I (x-axis) vs. V (y-axis), I would get the standard linear relationship specified by Ohm's Law. One question asked: What would happen if the voltage were reversed? (I think it means what would happen if the polarity was reversed.) I...

In my physics lab we were asked a question for advanced studying. I read the chapter that it was supposed to be in, but I couldn't figure it out. Q: For a series circuit, what is the terminal voltage of a batter or power supply equal to in terms of the potential differences or voltage drops...

1. What is the meaning of the Ohm's Law when applied to the whole circuit and to a part of a circuit? 2. The resistance varies directly with potential difference. What should be the graph of potential difference versus resistance at constant current? How would you get the constant current...

What is the shortcut on solving problems that deal with ohms law?