SUPER POSITION

SUPER-POSITION

- is to analyze a circuit, one source at a time.

using the superposition method, we remove the (independent) sources, except one, and analyze the circuit for that one.

then we repeat the procedure for another source, and so on.

for removing source, we replace the voltage source with a short circuit. Then, for current source we replace it with an open circuit.

CONSIDER THIS IS A CIRCUIT:

 Find the voltage at node B.

choose one of the two sources and remove it, and replace it with short circuit.

 

You can use Nodal Analysis, Ohm's Law, Voltage Division or Mesh for getting the value of B.
For easier to solve, You can use Voltage Division.
Then, use the formula of Voltage Division.

 B = (3*1// 3)/(2 + 1//3)

B1 now is equal to 0.8 or 9/11
Next is to kill the 3V source and replace with short circuit and leave 10V source.

repeat procedure
B2 now is equal to -1.8 or -20/11
Then, for the final value of B. B = B1 + B2
B = - 1 V