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Q.

Some A.C. circuits along with a few readings are given in column-I and in column-II some quantities are given. Match the entries of column-I with the correct entries of column-II. S  4 Power factor of the circuit is 0.6

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a

Codes:                    P                 Q                R                S                         1, 3             1, 3             1, 4             1, 2

b

Codes:                    P                 Q                R                S                          2                 1, 2, 3, 4       3                 1, 2, 3, 4

c

Codes:                    P                 Q                R                S                          1                 2                 3                 4

d

Codes:                    P                 Q                R                S                         1, 3             1, 2, 3                   3, 4             2, 4

answer is B.

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Detailed Solution

P:VR=250V Q:VR2+VL2=(158.1)2VL−VC2=(200)2VR2+VL−VC2=(250)2 ⇒VR=150V;VL=50V;VC=250V or 300VP.F=VRVS=0.6  R:VC=250V;VR=50V;VL=245VP⋅F=VRVS=0.2  S:VR=150V; VC2+VR2=(291.6)2VL2+VR2=(158.1)2⇒VL=50V,VC=250VPF=VRVS=0.6
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