Homework Statement
I have created four signals in Matlab and we need to play the sound of these signals.
The four signals I've created are:
n=[0:8191];
w0=2*pi*2000;
T=1/8192;
t=[0,1];
t=n*T;
x=sin(w0*t);
sound(x,1/T);
-----------------
n=[0:8192];
w0=2*pi*2000;
T=1/8192;
t=[0,1];
t=n*T...
Thank you for clarifying my wrong concepts.
But I still cannot understand that will D1 conduct if the Vi is less than 30V.
Also, how to determine Vo in (b)?
I don't know how to determine V1 I defined in (b) as the 100ohm resistor consumes some voltage.
And is Vo is equal to V1?
Thanks
Could you answer my questions directly?
I do have studied the properties of a diode!
However,I do not know whether the D1 in (a) is parallel to the 30V voltage source.
So I don't know if the breakdown voltage is 30 for D1.
Homework Statement
The question is posted below.
Homework EquationsThe Attempt at a Solution
I don't know how to solve this question.Does the breakdown voltage of a diode depends on the voltage source near the diode?For example,breakdown voltage of D1 in (a) is 30V?
Also, I don't know how to...
I started learning double integrals in this semester but I got some problems on it.
Is it matter if the order of integration interchange?
For example, V=∫f(x,y)dydx, can we rewrite the equation as V=∫f(x,y)dxdy?
If not, could you explain on it little bit:sorry:
Thanks!
Homework Statement
The problem is upload below.
Homework EquationsThe Attempt at a Solution
I was stuck at finding the voltage between the 100k resistor and 200k resistor.
Is the voltage zero since the node below there is zero and there is no resistor between them?
But if the node voltage is...
Homework Statement
The differential equation given:
y''-y'-2y=4t2
Homework EquationsThe Attempt at a Solution
I used the laplace transform table to construct this equation,and then I did partial fraction for finding the inverse laplace transform.But I'm now stuck at finding the inverse laplace...
Homework Statement
The question is showed as below.
Homework Equations
I don't know how to find i when the resistor is 4 ohm.
I think it is quite difficult as the voltage is varying all the time.
So how do I find the current?
Thanks!
The Attempt at a Solution
Homework Statement
The problem is posted below.
Homework Equations
In part b,I think I can use E1E2...A=I this property.
But I cannot find the answer.
The Attempt at a Solution
By using the property,I multiply the inverse giving with σ2and σ1.
However,the answer is not correct!
So how to get...
I don't know how to find the thevenin's equivalence of a circuit.
In this question,it is required to find the thevenin's equivalence of the circuit.
Firstly,I found the Rth,and the Rth is 20ohm.
But I had difficulty in finding the Vth.
In the first step I redrew the circuit in the following...
um…
So the 10ohm resistance is set to be a load resistance ?
But I still cannot understand …
There will be an open circuit after we remove the resistance(
Oh…Thanks
Btw I read some solutions from the internet
The solution shows that V1 is equal to V2
But if we supply 100V to them,R1and R2 will...
Um...I still cannot understand.
Could you explain why the total current is equal to I60Ω + I30Ω?
Why the value of the total current does not depend on other resistances?
And, how to find it by using Thevenin equivalents?:frown:
Thanks
Homework Statement
Homework EquationsThe Attempt at a Solution
(a)I think there are two pairs of resistances are in parallel,one pair is the 40ohm and 50ohm resistances,and the other pair is the 30ohm and 60ohm resistances.But I'm not to sure:oldfrown:
So the Req I've calculate is 152.2ohm...