# Consider a three-phase, 50Hz,11kV distribution system.Each of the conductors is suspended by an insulator string having two identical porcelain insulators.The self capacitance of the insulator is 5 times the shunt capacitance between the link and the ground as shown in the figure.The voltage across the two insulators is

1.  e1 = 3.74kV, e2 = 2.61kV

2.   e1 = 3.46kV, e2 = 2.89kV

3.  e1 = 6.0kV, e2 = 4.23kV

4.  e1 = 5.5kV, e2 = 5.5kV

4

e1 = 3.46kV, e2 = 2.89kV

Explanation :
No Explanation available for this question

# Consider a three-core, three-phase,50Hz, 11kV cable whose conductors are denoted as R,Y and B in the figure.The inter-phase capacitance (C1) between each pair of conductors is 0.2µF and the capacitance between each line conductor and the sheath is 0.4µF.The per-phase charging current is

1.  2.0A

2.  2.4A

3.  2.7A

4.  3.5A

4

2.0A

Explanation :
No Explanation available for this question

# For the power system shown in the figure below,the specifications of the components are the following: G1:25 kV,100 MVA, X=9% G2:25'kV,100MVA,X=9% T1:25 kV/220 kV,90 MVA,X=12% T2:220kV/ 25 kV,90 MVA,X=12% Line1: 220 kV,X=150 ohms Choose 25 kV as the base voltage at the generator G1 and 200 MVA as the MVA base.The impedance diagram is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# The transistor circuit shown uses a silicon transistor with VBE = 0.7V, IC ≈ IE and a dc current gain of 100.The value of V0 is

1.  4.65A

2.  5V

3.   6.3V

4.   7.23V

4

4.65A

Explanation :
No Explanation available for this question

# The TTL circuit shown in the figure is fed with the waveform X (also shown).All gates have equal propagation delay of 10 ns.The output Y of the circuit is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# When a "CALL Addr" instruction is executed,the CPU carries out the following sequential operations internally:  Note: (R) means content of register R            ((R)) means content of memory location pointed to by R            PC means Program Counter             SP means Stack Pointer

1.  (SP) incremented                            (PC)←Addr                                                       (SP) incremented

4

(SP) incremented

(SP) incremented

Explanation :
No Explanation available for this question

# The armature resistance of the motor is

1.  2Ω

2.  3.4Ω

3.  4.4Ω

4.  7.7Ω

4

3.4Ω

Explanation :
No Explanation available for this question

# For the motor to deliver a torque of 2.5 Nm at 1400 rpm the armature voltage to be applied is

1.  125.5V

2.  193.3V

3.  200V

4.  241.7V

4

193.3V

Explanation :
No Explanation available for this question

# g(t)can be expressed as

1.  g (t ) = f (2t - 3)

2.  g(t)=f((t/2)-3)

3.  g(t) = f(2t-(3/2))

4.  g(t)=f((t/2)-(3/2))

4

g(t)=f((t/2)-(3/2))

Explanation :
No Explanation available for this question

# The Laplace transform of g(t) is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

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