State Kirchhoff’s rules governing the currents and electromotive forces in an electrical network?
Answers
Answer:
(1)Kirchhoff current law(KCL)
The algebraic sum of all the current meeting at a junction in an electric circuit is zero.i.e Σ I =0
The total current entering the junction= total current leaving in the junction.
this law is based on the principle of conservation of charge.
(2) Kirchhoff's voltage law(KVL)
The algebraic sum of the EMF in any loop of a circuit is equal to the sum of the products of currents and resistance in it.
i.e. Σ E =ΣIR
Sign convention:(1) We can take any direction as the direction of travel.
(2) The EMF of a cell is taken as +ve if the direction of travel is from -ve to +ve otherwise -ve.
(3)The product IR is taken positive in the direction of current otherwise negative.
Electromotive forces(EMF)
Electromotive force (emf) is a measurement of the energy that causes current to flow through a circuit. It can also be defined as the potential difference in charge between two points in a circuit. Electromotive force is also known as voltage, and it is measured in volt
hope it helps yrr