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Discussion :: Exam Questions Papers - Exam Paper 1 (Q.No.1)

1. 

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

Answer: Option D

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.

Report errors
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?

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