Network Theorems

Question 1

State Kirchhoff’s first law.

Answer 1

Current Law:
The Sum of the currents flowing into a junction is equal to the sum of the currents flowing out of that junction

Question 2

State Kirchhoff’s second law.

Answer 2

Voltage law:
The algebraic sum of all the EMF’s in a closed circuit equals the sum of the voltage drops.

Question 3

State Superposition Theorem.

Answer 3

in any linear multiple-source network, the resultant current in any branch is the algebraic sum of the currents that would be produced by each source acting separately

Question 4

State Thevenins Theorem.

Answer 4

Any two-terminal network containing resistances and sources of EMF may be replaced by a single source of EMF(Vₜₕ) in series with a single resistance(Rₜₕ)