Question

The graph of an electrical network has $N$ nodes and $B$ branches. The number of links $L$, with respect to the choice of a tree, is given by

• A. $B-N+1$
• B. $B+N$
• C. $N-B+1$
• D. $N-2B-1$

Answer 1

The correct option is A $B-N+1$

$Numberoflinks=B-(N-1)$
$=B-N+1$