# Electronics and Communication Engineering - Exam Questions Papers - Discussion

1.

In the following non planar graph number of independent loop equations are [A]. 8 [B]. 12 [C]. 7 [D]. 5

Explanation:

Number of independent loop equations are given by,

L = B - N + 1

where L : No. of loop equations

B : No. of branches = 12

N : No. of nodes = 8

L = 12 - 8 + 1 = 5.

 Sesanathan S said: (Nov 23, 2014) Need to theoretical explain.

 Jadhav Sachin Ramchandra said: (Jan 11, 2015) Explain all the terms why the answer is five?

 Jiten said: (Mar 22, 2015) Explain please.

 Saravana said: (Jul 23, 2015) I don't know which is node and branches so explain thus concept.

 Amarjeet said: (Aug 24, 2015) Node: A point or junction where two or more circuit's elements (resistor, capacitor, inductor etc) meet is called Node. Branch: That part or section of circuit which locate between two junctions is called branch. In branch, one or more elements can be connected and they have two terminals. Loop: A closed path in circuit where more than two meshes can be occurred is called loop i.e. there may be many meshes in a loop, but a mesh does not contain on one loop. Mesh: A closed loop which contains no other loop within it or a path which does not contain on other paths is called Mesh.

 Jayasudha said: (Feb 8, 2016) This answer explanation is good and also say some different concept.

 Achu said: (Sep 9, 2017) Can anyone explain what is meant by planar and non planar graph?

 Lakshmi Durga said: (Sep 16, 2017) Planar graph that can be drawn without edges that intersects within a plane. Non planar graph that cannot be drawn without edges that intersects within a plane.

 Nikhil Kumar said: (May 3, 2018) How the number of branches is 12, can anybody explain?

 Mohan said: (May 10, 2018) No of lines connected between 2 points or nodes having minimum of one element (r, l, c).

 Sandy said: (Feb 18, 2019) Can someone please explain it in detail?