What is Current calculation: Definition and 30 Discussions
In electromagnetism, current density is the amount of charge per unit time that flows through a unit area of a chosen cross section. The current density vector is defined as a vector whose magnitude is the electric current per cross-sectional area at a given point in space, its direction being that of the motion of the positive charges at this point. In SI base units, the electric current density is measured in amperes per square metre.
Hello everyone!
I've been trying to solve this circuit but there's something wrong. Firstly, I made a Delta-Y conversion so that1 and zA were in series, and so were z5 and zb. I really don't know if writing "I0=IA-IB" is correct, cause basically I0 is the current that flows between the nodes A...
Hello!
I've obtained common mode choke from detached pieces, so I don't know anything about them, exept for their inductance/resistance.
I'd like to know how could I determine the rated current of these coilsthank you in advance for your help
To my understanding, current density is simply the current flowing through the alkaline electrolyzer divided by the area (the units for current density are A/m^2). But what would the area be in this situation? Is it the area of the electrodes or maybe the area of the electrolyte solution or...
Hi,
Please find attached below the Induction Generator circuit.
I have the following parameters:
Parameter
Value
Rs = Rr (Resistance on stator and rotor)
0.2 Ω
Ls = Lr (inductance on stator and rotor)
5 mH = 0.005 H
p (number of pairs of poles)
2
f (frequency)
60 Hz
Vsl (stator line...
a. When the transistors are ON.
##V_{CC} = V_L##
##V_{CC} = L \frac{di_L} {dt} ##
##i_L = \frac{V_{CC}t} L ##
b. I am bit confused when the transistor is "OFF"
The point "A" is floating? The transistors and the diodes all the elements seem to be open is it correct? I am confused here.
According to the circuit in the figure; Can you calculate the values of the currents I1, I2, and I3.
Can you send me a detailed solution to understand?
Hello there!
I have seen some great eddy current brakes and wanted to learn more about it. The problem in the internet I can not the specific case I have in mind.
I searched the internet and found a great deal of material about magnetic forces. I cannot, however, find the specific case I'm...
Homework Statement:: problem solving
You build a wire by combining an 8 inches copper wire with a 10 inches nichrome wire. If their combine resistance is 10 kΩ, find the cross section area of both wires. The nichrome wire has twice the area of the copper wire.
Homework Equations:: I = V/R...
Homework Statement
In the circuit shown in the figure each capacitor
initially has a charge of
magnitude 3.60nC on its plates. After the switch S is closed, what will be the
current in the circuit at the instant that the capacitors
have lost 80.0% of their initial stored energy?
the shown 3...
<< Mentor Note -- Thread moved to the EE forum >>
Hi, I'm new here and maybe this is the best section where I could need help :) I've been interested in electronics lately (not schooling anymore, more on self-study, but I'm not that smart, just a dedicated one and i can't understand everything...
Homework Statement
finding the resistor and current which is following through the circuit[/B]Homework Equations
kirchhoff law
The Attempt at a Solution
almost as fig 1 ( 9v=3.458 mA and 12v=11.122 mA)
fig 2 (9v=1.472 mA and 12v=12.882 mA) i3=2.48 mA
Homework Statement
Find the voltage Vo for this circuit.
Given: is = 36 A
Link to circuit: https://session.masteringengineering.com/problemAsset/1824621/4/pr_2-32.jpg
Homework Equations
V = IR
Kirchhoff's laws for current and voltage.The Attempt at a Solution
I first noticed that the...
Note: I have a feeling this is below Electrical Engineering requirements, but I couldn't find a more suitable category, so I think I'll extort the advantages of a forum base with electrical understanding more than I think may be required(ofcoarse I know very little about the field, so I may fall...
Homework Statement
http://imgur.com/AotzH28
Two long, straight conducting wires with linear mass density λ are suspended from cords so that they are each horizontal, parallel to each other, and a distance d apart. The back ends of the wires are connected to each other by a slack,low-resistance...
I have recently purchased this servo motor ,which has rated stall torque of 33 kg cm at 6V.
Statical current :16 mA
Stall Current: 3+0.6 AOur technical query is,in order to obtain the maximum torque..what current do we need to be able to supply it
Is 16 mc sufficient..or we need 3.5A?
If I have to transfer 250 MWh through 3 phase aluminium tubular busbar what is the maximum current carrying capacity under normal condition at 80c temperature and voltage is 132kv at busbar from each 60mw 04 transformers 50hz 132/11kv stepup transformers connected on that busbar,
this is not...
hello,
while making a circuit ( uploaded pic) ,the specifications of leds are 50mA/2V, i found the current ( ID )just before the leds to be around 180mA. i just want to know how to determine the currents in the circuit at various points( IA, IB , IC, ID). in general i want to know how to...
I am doing an experiment where am giving 5 volts sinusoidal input voltage to a coil and receiving 1.5 volts in other coil how can i calculate current flowing through it..? if i take current as the ratio of input voltage to impedance of circuit will it be correct...?
Homework Statement
I'm decent with differential equations for RLC circuits, and I KNOW the stationary current will be zero, but I need help to work it out mathematically, because my maths gets me -2.4A (...)
L: 0.05H
C: 0.04F
R: 3 Ω
U (source) = 1 V
I've got the transient solution: c1e-10t +...
Homework Statement
I need to find the complex current in this circuit
http://imageshack.us/photo/my-images/51/figure1j.jpg/
Homework Equations
I calculated the inductor's impedance and found that impedance = 12.57 Ohms
so I used it in the equation for the Current.
I need to write the answer...
Homework Statement
Required data provided on the http://futureislong.tumblr.com/image/35265986925Homework Equations
Not requiredThe Attempt at a Solution
I can easly calculate the voltage but no idea how to calculate current...
Here is the image:
Please help me calculate all the currents...
Homework Statement
A 500 mm conductor inside an electric motor has a force of 1.5 Newtons exerted on it. If it is at right angles to a magnetic field of flux density 0.6 T, calculate the current flowing in the conductor.
Homework Equations
F=B.I.L
The Attempt at a Solution
B = 0.6T
F =...
Hello,
While reviewing my professor's notes and my textbook I've run to a discrepancy in regard to how to calculate line current in a 3-phase circuit.
In these particular examples, you are given a 3-phase balanced y-source connected to a y-load with equal impedance on each phase. In...
Calculate drift current.
length of wire 1m for 10V
cross sectional area = 0.001m^2
e = 1.602 x 10^-19
ue = 3.18 x 10^-7
n = 10^23 electrons / m^3
what does ue stand for?
how do i calculate drift verlocity?
3. The Attempt at a Solution
i am using the formula
I = nAVq
where...
Homework Statement
http://img560.imageshack.us/img560/2759/theprob.jpg
Calculate the direction and value of I1 going through R1
The Attempt at a Solution
Can you let me know if this is correct? Seems to make sense to me.
http://img220.imageshack.us/img220/8484/72041802.jpg
Last time I was talking about Isolated Voltage, and some of you people were really helping me about, but I posted (did) something stupid and got the thread deleted.
I am sorry for that.
Now, I want to talk about my confusion in a different (safe) way.
The above figure shows a...
Homework Statement
I have the following circuit
http://informatici.vankeer.eu/files/2/Untitled.png
R1 = 22 ohm, R2 = 39, R3 = 82, R4 = 100,R5 = 10
and V = 2volt
I'm asked to calculate the voltage and current over de resistors
when the switch is open and when the switch is closed...
Six, 6.6kV ,3phase, alternators are connected to a common set of bus bars.
Each has positive negative and zero sequence reactances of 0.90 ohm, 0.72 ohm, 0.30 ohms respectively . An Earth fault occurs on one bus bar . Determine the value of fault current if all alternator neutrals are solidly...
A really basic circuit problem which I just don't understand.
In the attached figure, C is a cell of e.m.f. 2V and internal resistance 1 Ohm. Calculate:
a) the current through A
b) the current through B
c) the p.d. between the terminals of the cell
I really don't understand how to calculate...