# In the network shown in the given figure , if the voltage V at the time considered is 20 V , then dV/dt at that time will be

1.  1 V/s

2.  2 V/s

3.  – 2 V/s

4.   zero

4

2 V/s

Explanation :
No Explanation available for this question

# The phase angle of the current I with respect to the voltage V1 in the circuit shown in the figure is

1.  00

2.  + 450

3.  - 450

4.  - 900

4

- 900

Explanation :
No Explanation available for this question

# The V – i characteristics as seen from the terminal pair ( A , B ) of the network of Fig.(a) is shown in the fig.(b) .If an inductance of value 6 mH is connected across the terminal – pair ( A , B) , the time constant of the system will be

1.  3 μ sec

2.  12 μ sec

3.  32 μ sec

4.    Unknown ,unless the actual network is specified

5.  Analogy-comparing the intersection to something dangerous

6.  emotion-referring to the safety of children to get people interested

7.  statistical analysis-noting the number of children almost hit and the cost of a stop light

8.  personalization-telling the story of one child’s near accident at the intersection

9.   attack-pointing out that people who are against the stoplight do not care about children

9

emotion-referring to the safety of children to get people interested

Explanation :
No Explanation available for this question

# A load that has a resistance of 10 ohms is to be connected to a supply that has a constant voltage of 120 volts . If it is desired that the current to the load be varied from 3 to 5 amperes , what are the resistance and the current rating of the series rheostat that permit this variation

1.  30 ohms , 5 A

2.  10 ohms , 10 A

3.  20 ohms , 10 A

4.  20 ohms , 10 A

4

30 ohms , 5 A

Explanation :
No Explanation available for this question

# The voltage transfer ratio V2 / V1 for the network shown in the figure is

1.  1/13

2.  2/13

3.  3/13

4.  4/13

4

2/13

Explanation :
No Explanation available for this question

# A balanced star – connected load with impedance of 20 < - 300 ohms is supplied from a 3 – phase , 4 – wire , 173 volts system , the voltage to natural being 100 < - 900 , 100 < - 300 and 100 < -1500 V. The current in the neutral wire

1.  5 A

2.  8.85 A

3.  zero

4.  50 A

4

zero

Explanation :
No Explanation available for this question

# For the networks shown in Fig.(a) and (b) to be duals , it is necessary that R′ , L′ and C are respectively equal to

1.  1/R, C and L

2.  1/R, 1/Land 1/C

3.  R , 1/L and C

4.  R ,L and C

4

1/R, C and L

Explanation :
No Explanation available for this question

# The time – constant of the network shown in the figure is

1.  CR

2.  2 CR

3.  CR/4

4.  CR/2

4

CR

Explanation :
No Explanation available for this question

# In the circuit shown in the given figure , steady – state was reached when the switch S was open .The switch was closed at t = 0.The initial value of the current through the capacitor 2C is 12 Amp

1.  Zero

2.  1 amp

3.  2 amp

4.  3 amp

4

Zero

Explanation :
No Explanation available for this question

1.  10.5 ohm

2.  6 ohm

3.  3.5 ohm

4.   3 ohm

4