Calculating time constant in RC circuit

AI Thread Summary
The time constant in an RC circuit is calculated using the formula T = RC. Users are encouraged to determine the correct equivalent resistance (Req) for accurate calculations. The Thevenin equivalent method is suggested as a reliable approach to simplify the circuit analysis. One participant successfully applied this method after initial difficulties with different resistance combinations. Utilizing the Thevenin equivalent can enhance understanding and accuracy in calculating the time constant.
Hitman6267
Messages
17
Reaction score
0
Capture.PNG

I know that T = RC

I've tried different combinations of R (not really sure what Req to take) but none of them worked. Any one can show me the right way ?
 
Physics news on Phys.org
Have you tried taking the Thevenin equivalent for point a to b?
 
No I haven't and it was suggested on another forum and it worked. Thank you :)
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...

Similar threads

Back
Top