Resistor Definition and 879 Threads

Could someone be so kind as to assist me in solving the following problem? I have had some basic knowledge of how the effect of multiple resistors add up in parallel in and in series, but I'm pretty much lost on how to solve this problem. Consider an infinite network of resistors of...

I am getting ready for my lab tomorrow and one of the questions is this: ok, here's what I think: since current flows from anode to cathode and in first case LED's anode is connected to the pull-up resistor, so there's current through it and it's going to light. In second case, wouldn't it...

I'm building an electric furnace using a coiled resistance heating element. The wire is a high temp alloy made for kilns and furnaces (Kanthal A-1 if you care.) Anyway... I can't find a way to calculate how hot the wire will get based on the current load and amount of wire. If the wire is too...

Hi Guys! well! i have designed a mosfet amplifier. This amplifier uses only MOSFET in its operation along with an input signal and capactors and resistors and VDD. I want to ask u one thing. The amplifier which i have designed takes 0.1V of AC signal as an input and provides a gain of...

Hey everyone. I am doing an Ohm's law lab where there is a variable source, a fixed resistor, a voltmeter across the resistor, and an ammeter in series with the resistor. The fixed resistor is an unknown value but has a tolerance of 5% You need to figure out its value by plotting...

Imagine a cube where all sides have a resistor, now remove one resistor from it and replace it with an ohmmeter, the ohmmeter reads 100ohms, calculate the resistance of each resistor. By the way each resistor is the same value. How do you go about doign this question?

If there is a circuit with--Emf -5V and one 5ohm resistor and one 20 F capacitor, what is the current of the circuit? Will there be any effects on current because of capacitor? :smile:

A controller on an electronic arcade game consists of a variable resistor connected across the plates of a 0.220\mu F capacitor. The capacitor is charged to 5.00V, then discharged through the resistor. The time for the potential difference across the plates to decrease to 0.800V is measured by a...

Hi! I connect 9 volts to a 1 ohm resistor and thought I would get I = U/R = 9 A. But when I connect the ampmeter, I cannot read anything! Where is the problem?

is current used up in a resistor or the voltage is used up?

does anybody know how to calculate the self-inductance of a resistor in a series A.C resistive capacitive circuit? (have values for supply voltage, R voltage, C voltage, current) any help at all would be much appreciated

I have physics courseowkr due tomorrow on sensors. Mine is on thermistors. I have got results of voltage across a resistor and this is compared with temperature. I don't know what my results tell me though and so I can't really hand in the coursework. Does anyone know anything about thermistors...

I really confused by this circuit: http://myspace.homelinux.com:32123/circuit.jpg When calculating the net resistance from A to C, how do I know if any current goes through 2 and 7? If there was current going through them, I have clue how they would contribute to the total circuit. For the...

Hi all, I need to find the current through a resistor knowing the # of electrons passing through it over a given time, t. Can someone help me out with this? I thought it was just I = #elec/time, but this cannot be right (i'm getting values along the lines of 1.5E19 Amps) Thanks, Brad

if you have a circuit where there are resistors in parallel as well as in series how do you calculate the current through each individual resistor? I have found examples that explain it when they are all in series or all in parallel but i am very confused otherwise.

Question 1: A group of n resistors each of resistance R, are connected in series. What is the total resistance?What is the total resistance if the resistors are connected in parallel? Questions 2: A series-parallel group of resistors each of resistance R, have n equal resistances in series...

Hello, My data gravely perplexes me. I've set up a simple series RC circuit with an AC emf of 14V @ 20Hz. Resistor and capacitor values are 3.9E4 ohms and 4.7E-5 farads respectively. Ideally, the voltage across the resistor should be a simple sine curve, since this is basically an RLC series...

Lets say I'm given a 'specific heat, density, currenty density J, and the time that J exist, how can if find the the change in Temperature? My main problem is I don't know how to start the problem, a couple pointer in the right direction would be great. Thanks Philip

I have the solution to this problem, but I can't figure out how to solve it for the life of me. I'd appreciate any assistance: Image: http://www.cc.gatech.edu/~strobel/problem.gif The switch in the figure above has been in position 'a' for a very long time. It is suddenly flipped to...

hi, i want to ask, what is the impedance across a resisitor? isn't it just the value of the resistor? say i have a resistor of 50ohms, then its impedance is 50ohms, right?? thanks!

http://floti.bell.ac.uk/principles/star%20delta/img008.gif sorry...i don't know how to post the pic here...juz want to know if 6R resistor is replaced by a galvanometer which has the internal resistance 6R,what will be the reading?

A circuit with capacitor and resistor ! Dear all, it is a simple electric circuit include one capacitor and one resistor in parallel. about 25V is provided. Then i assume I1 cross the capacitor and I2 cross the resistor. Therefore, when a capacitor has a constant change, can i assume the I1...

A resistor (20 ohm) is made of a very thin piece of metal wire, length = 3mm and diameter = .1mm. Given that it has a potential of 8 volts and .4 amps of current running through it, what is the electric field inside the wire? I know there's no electrostatic equilibrium here, so I can't just...

I've thought and thought and thought about this, but I can't figure it out. How might I be able to estimate the apparent resistance of an oscilloscope? We're dealing with an oscilloscope connected to a circuit which uses a resistor and a capacitor. I think this question might have something to...

In a smiple circuit with just one resistor, consider the current that flows. If you increase the resistance, less current flows. If you increase the supply voltage, the current increases. One book says that increasing voltage provides charge with the energy needed to get through the resistor...

Problem 17. A(n) 5.2 ohm resistor, a(n) 9.2 ohm resistor, and a(n) 14 ohm resistor are connected in series with 6.0V battery. Determine the equivalent resistance for the circuit. Answer in units of ohms. Note: I don't know where to start. Problem 26. A resistor with an unknown...

Determine V1 and R3 if R1= 8ohms I1= 0.75A, R2=5 Ohms and I2=6A. Note that R2 and R3 are connected in parallel. Thank you.

what is the current through the 2 ohm resistor? what is the current through the 8 ohm resistor? 8 V ...! |... . empty space . . empty space . I . empty space . ...2 ohm Res... . empty space . . empty space 8 ohm Res . empty space . I_2 . empty space . ...! |... 16 V...

well i hope someone knows how to solve this problem... :smile: well you see in the picture that there is a honeycomd-like circuit...every line that comprises the honeycomb has a resistor with a resistance of R...meaning in a hexagon, there are six resistors... the question is to find the...