Electrical Engineering - Circuit Theorems and Conversions - Discussion
Discussion Forum : Circuit Theorems and Conversions - General Questions (Q.No. 11)
11.
What is the Thevenin equivalent (VTH and RTH) for the circuit given?
6.4 V, 422 
6.4 V, 560
6.4 V, 680
30 V, 422
Discussion:
13 comments Page 2 of 2.
Subarna Das said:
1 decade ago
Vth = {30*(470/470+560)}-{30*(220/220+680)}.
Vth = 6.3V.
Rth = (470+220)//(680+560).
Rth = 443 ohm.
So, option 1 is right.
Vth = 6.3V.
Rth = (470+220)//(680+560).
Rth = 443 ohm.
So, option 1 is right.
(1)
Praveen juturu said:
1 decade ago
Thevenin's resistance is (R1 // R2) + ( R3 // R4).
Thevenin's voltage is obtained by applying potential divider rule,
Vth = Voltage across R2 - voltage across R4.
Thevenin's voltage is obtained by applying potential divider rule,
Vth = Voltage across R2 - voltage across R4.
M.V.KRISHNA/PALVONCHA said:
1 decade ago
From the circuit
Vth= ((R1||R3)*Vs)/(R1+R3);
(note: R1||R3 means R1 in parllel with R3, R1||R3=149.8);
on sloving we get
Vth=(149.8*30)/690
Vth=6.5 (app. equal to 6.4v;
from the circuit we get
Rth=(R1+R3)||(R2+R4)
Rth=690||1240;
Rth=443.31(app. equal to 422 ohm)
so option A
Vth= ((R1||R3)*Vs)/(R1+R3);
(note: R1||R3 means R1 in parllel with R3, R1||R3=149.8);
on sloving we get
Vth=(149.8*30)/690
Vth=6.5 (app. equal to 6.4v;
from the circuit we get
Rth=(R1+R3)||(R2+R4)
Rth=690||1240;
Rth=443.31(app. equal to 422 ohm)
so option A
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers