hello guys
iam doing my homework in magnetic fields course
and i found this problem i solved (a) and (b)
by using F=I L x B and the total force on the triangular loop would be zero
but in (c) i tried alot to find the torque on the loop but i couldn't get the same result
so please help me...
hello guys ..
first of all , iam not sure that i should type this thread here . so excuse me for that
in this problem i can understand the part untill it's said that w=0 then x(t)=1, which is periodic for any value of T
but i can't understand the part after that in the case of w is not equal...
hello guys :)
i need your help with this problem
i can understand that in (a) we will use the integral of row(v) * dv to get the charge
and in (b) we will use the formule D(r)=Q/[4*PI*r^2]
but in (C) should it be zero or what ??
and if it should be zero why in the solution manual it...
Hello guys !!
i have this problems while solving problems on vector calculus ..
i solved (a) , (b)
as i put P(2,4,3) in the formula of S and i solved it and i solved (b) as a(S)= S/lSl
but in (c) i don't how what should i do to solve it ..please help me guys ..Thank you
[Help] with Numbering System "Digital Circuit"
Hello Guys ..
iam having an exam on digital circuits and i try to work on some problems about numbering systems
and i found this problems but i couldn't solve it ..
i said that (x-3)(x-6)=x^2-11x+22
then i said that...
Hello Guys !!!
iam studing the electric flux and how the relationship between D ( electric flux density ) and E ( elecric field)
but i found this problem and i don't know which formula should i use to solve it to find the electric flux
i know that Q=(Psi)=the electric flux but i...
Hello guys !! :)
i need your help in the integration which is used to calculate the total charge in the electric field
in a continuous volume charge distribution
in this example i can't understand how the integration was done ..so please help me with this :)
The example ...
hello guys ...
i want to design this circuit on proteus and print it to put it on a board
this is a regulated power supply circuit
the problem is that iam a beginner in proteus ...so can anyone help me how to start ?
The Circuit :
please help me guys with this ..Thanks :)
hello guys
while studing the diode limitters
i found two examples i solved the first one but i couldn't with the second
1 -
2-
in the first i know that the diode while be forward biased in the negative half of the signal
so the negative half will be limitted to -0.7 v...
Hello guys ..
i need your help with something
in this photo i understand the way to calculate R thevenin's and the way to calculate E thevenin's
but i couldn't understand
why did we put the polarity in this way ??
i mean why can't we put switch the polarity of the battery ...
hello guys
i have been trying to solve this problem for a long time but i couldn't so i need your help..
iam trying to analyze the circuit using mesh analysis
so i converted the current so to voltage source E=2*10=20V
i don't know how to redraw the circuit taking this shape...
hello guys !!
i know that in zener diode limitting circuit
there are three types : 1-limitting Positive peak 2-limitting Negative peak 3-limtting both peaks
and i know that output voltage for
limitting positive peak =VZ+0.7v
limitting negative peak= -VZ-0.7v
but i don't know what will...
hello guys :))
the question is :
in (a)
IT= 10/[4k||8k+4k||4k]=2.14 mA
but i can't calculate I so please guys help me i tried many times to get it but i couldn't :(
thx guys !!
Hello Guys !!
While Studing coupling transformers i found this problem
i tried to solve it
but i don't know if my solving is right or no !!
so tell me :)
The problem :
My solve is :
V(out)=nV(in)
V(out)= 2 * 312 = 624 v
PIV = V(out) = 624 v
and if the diode is...
Nodal Analysis , Can't Understand the direction of a current !!
In This Question "Nodal Analysis" we will apply kirchoff's current law ..
My Question is :
Why in Fig 8.51 and 8.52 the currents take these directions ??
i tried to get it but i couldn't
Photos :
Thanks...
Which Law should i use to analyze this circuit ??
Hello Guys !!
Sorry i have many questions because iam not a professional in this ..
My Question is :
in this photo i found that the total Resistance is : 5 ohm
and
the total current is 16 A
and
I3 = I9 = 4 A
and I8= 1 A
I...
Hello Guys !!
In This photos i found that
in (a) : RT= 4 Ω+ 10 Ω+ 4 Ω= 18 Ω
and
in (d) : RT= 10 Ω
but i can't understand why in (a) the total resistance equals to 18 and how will the current would pass ??
and in (d) i can't understand why the total resistance equals to 10 and why we...
Hello Guys !!
My Question : in this photo i found That Total Resistance will be = 7 ohm .
and I2 = 12 / 7= 1.71 A and I1 = 0.5 * I2= 0.5 * 1.71= 0.85 A
I can't understand why I1= 0.5 I2 ?? and why it isn't the same of I2 ??
here is the photo
Thank you Guys !! :))
Hello Guys !!
My question is : why in these photos the ohmmeter reads the total resistance ??
I mean why in (a) the ohmmeter can't read the 8 ohms resistance ?
and
Why in (b) the ohmmeter can't read the (2||10 ) resistance ?
Thank you Guys !! :))
Hello Guys
My Question about Kirchoff's Law is : why in this Example
we considered that E2 is a Voltage Drop not a Voltage Rise ??
i mean why we didn't say that : +E2-V1-V2+E2=0 ???
and Thanks Guys :)) !!
hello guys !!
iam new at this forum and i have a question :))
The quesion is : why can't i calculate V7 from Ohm's Law So V7=E/R7
and it will be equal to 72/9=8V
Please answer me and thank you guys :)