![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/467040/image.png)
how to solve equation and mark value on its graph?
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Let's say r = 200 ohm, and c = 200 microF
I have the following equation
Vc = V*(1-exp(-t./(R*C)));
and I need to solve it to get the value of t when v = 8 volts.
2 commentaires
Image Analyst
le 21 Déc 2020
Modifié(e) : Image Analyst
le 21 Déc 2020
What is v? Or did you mean V (MATLAB is case sensitive) or Vc?
And what is V?
Is this homework:
If I guess V = 10, I get this:
R = 200 % ohm and
C = 200 % microF
C = C * 1e-6 % Farads
V = 10; % Volts Guessing here!
% I have the following equation
t = linspace(0, .6, 1000);
Vc = V * (1 - exp(-t ./ (R * C)))
plot(t, Vc, 'b-', 'lineWidth', 2);
grid on;
xlabel('t', 'FontSize', 20);
ylabel('Vc', 'FontSize', 20);
yline(8, 'Color', 'r', 'LineWidth', 2);
% and i need to solve it to get the vakue of t when v = 8 v
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/467040/image.png)
Réponses (1)
KSSV
le 21 Déc 2020
syms Vc V t R C
eqn = Vc - V * (1 - exp(-t ./ (R * C)))==0 ;
s = solve(eqn,t)
The above is the formula from the equation to solve for t. Substitute your values and get the values of t.
0 commentaires
Voir également
Catégories
En savoir plus sur Number Theory dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!