Wednesday, December 31, 2014

MOST IMPORTANT BITS ELECTRICAL CIRCUITS -1

1) A network has 7 nodes and 5 independent loops. The number of branches in the network is
a) 13    b) 12       c) 11           d) 10                                                                                        Ans: ( c )
2) The nodal method of circuit analysis is based on
a) KVL & ohms  law b) KCL & ohms law c) KCL & KVL d) KCL,KVL & ohms law            Ans: (b)
3) For a network of seven branches and four nodes, the number of independent loops will be
a) 11        b) 8                   c) 7                       d) 4                                                                  Ans:(d)
4) A network has”b “branches and” n “nodes. For this mesh analysis will be simpler then node analysis if n is greater then
a) b         b) b +1               c) (b / 2 ) + 1                            d) b / 2                                             Ans:(c)
5) The number of independent loops for a network with n nodes and b branches is
a) n-1                 b) b-n                 c) b-n + 1                     d) independent no. of nodes              Ans: (c)
6) The following constitutes a bilateral element
a) R                b) FET                  c) Vacuum Tube                d) metal rectifier.                         Ans: (a)
7) K.Laws fail in the case of
a) linear networks      b) non linear networks   c) dual networks    d) distributed parameter networks. Ans: (d)
8) Ohm‟s law, KVL &KCL will fail at
a) Low frequency          b) high frequency                     c) high power               d) none            Ans: (b)
9) Total no, of mesh equations required is equal to
a) no of links       b) no. of tree branches         c) no. of nodes            d)none                             Ans; (a)

10)Two incandescent light bulbs of 40W & 60W rating are connected in series across the mains. Then
a) The bulbs together consume 100W          b) The 60W bulb glows brighter

c) The 40W bulb glows brighter d) The bulbs together consume 50W                                           Ans: (c)

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