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Tuesday 14 February 2012

GATE - 2012 Exams

BRAINWAVE

GATE – 2012

Network Theory

Max.Marks:25 (Q.1-Q.5 1 Mark, Q.6-Q.15 2 Marks)                                             Max.Time:45 Min.s

1.Find Rab 



           a) 22.5                b) 24               c) 31.5             d) 17.35

2.Total resistance Rin is in the circuit shown


    
           a) (1+√3)              b)  (1-√5)/2                 c)  (-1+√5)/2                d)  (1-√3)/2

3.What is the Rab in the circuit when all resistors values are R



a          a) 2R                    b) R                 c) R/2               d) 3R

4.The voltage V in fig always equal to




            a) 9V                   b) 5V              c)1V                d) None

5.Find VX in the circuit shown




                 a) 2.5 V               b) -2.5V           c) 0V              d) 10V

6.What is the value of i1?




           a)  0                      b) – 6               c) 6                  d) none

7.Find Vxy





               a) 10V                 b) 46V                         c) 13V                         d) 58V 

8.In the circuit of fig. The value of the voltage source E is





a) –16V           b) 4V              c) –6V            d) 16V

9.The voltage across 15 ohms resistor is




                       a)  -105V              b) +105V         c) –15V          d) + 15v

10.The energy stored in the capacitor is




               a) 8μj                   b) 30μj             c) 45μj             d) 900μj

11.The equivalent capacitance across ‘ab’ will be [C = 0.1μ f]




               a) 0.2μf                b) 0.1μf           c) 0.5μf            d)0

12.In the circuit shown in fig, for R=20 ohms the current I is 2A. When R is 10 ohms the current I would be




           a) 1A                b) 2A               c) 2.5A                       d) 3A

13.Find i2 in the fig shown?




          a)   4                      b)2/3                c)-2/3               d)none

14. What is the current supplied by 1V source when each resistance is 1 ohm?




                  a)  8/15                 b)15/4              c)4/15              d) none

15.The voltage V0 is




            a) 2V               b) 1V              c) –1                d) -2/3

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