For a given power system, its zero and maximum regulation will occur at the impedance angle of

Which of the following are the properties of TEM mode in a lossless medium? 1. Its cut-off frequency is zero. 2. Its transmission line is a hollow waveguide. 3. Its wave impedance is the impedance in a bounded dielectric. 4. Its phase velocity is the velocity of light in an unbounded dielectric. Select the correct answer using the code given below

A

1, 2 and 3

B

1, 3 and 4

C

1, 2 and 4

D

2, 3 and 4

Angle ‘A’ of a cyclic quadrilateral ABCD is 53° less then angle B. Angle B is twice of angle C and angle C is 40° more than angle D. What would be the measure of angle A?

A

100.57°

B

102.33°

C

115.87°

D

110.44°

There is 2-machine model having losses too, with their transfer impedance being resistive. The maximum value of sending power P1max and maximum receiving end power P2max will take place with power angle ‘δ’ such that

A

Both P1max and P2max will occur at δ<90

B

Both P1max and P2max will occur at δ>90

C

P1max occurs at δ > 90 and P2max will occur at δ<90

D

P1max occurs at δ < 90 and P2max will occur at δ>90

In the following figure, the transmitter Tx sends a wideband modulated RF signal via a coaxial cable to the receiver Rx. The output impedance ZT of Tx, the characteristic impedance Z0 of the cable, and the input impedance ZR of Rx are all real. Which one of the following statements is TRUE about the distortion of the received signal due to impedance mismatch?

A

The signal gets distorted if Z_R ≠ Z₀, irrespective of the value of Z_T

B

The signal gets distorted if Z_T ≠ Z₀, irrespective of the value of Z_R

C

Signal distortion implies impedance mismatch at both ends: Z_T ≠ Z₀ and Z_R ≠ Z₀

D

Impedance mismatches do NOT result in signal distortion but reduce power transfer efficiency

After conjugate impedance matching the input impedance used for matching after normalization was 1+j with the characteristic impedance of the transmission line being 100Ω, then the generator impedance must have been:

A

100+100j

B

1+j

C

100-100j

D

1-j

If source impedance is complex, then maximum power transfer occurs when the load impedance is _______ the source impedance.

A

equal to

B

negative of

C

complex conjugate of

D

negative of complex conjugate of

Maximum power transfer theorem states an independent voltage source in series with an impedance Zth delivers a maximum average power to the load impedance ZL; wherein

A

Z_L = Z_th

B

Z_L ≠ Z_th

C

Z_L = Z*_th

D

2Z_L = Z_th

Consider the following statements regarding the Coastal Regulation Zones (CRZs) in India: Coastal Regulation Zones are defined under the Environment Protection Act, 1986. It includes an Intertidal zone and an area up to 500 meters from the High Tide Line (HTL). Projects related to the development of atomic energy are prohibited in the Coastal Regulation Zone (CRZs). Which of the statements given above is/are correct?

A

1 only

B

2 only

C

1 and 3 only

D

1, 2 and 3

The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph. P: In February 2010 the medical council of India announced a major change in the regulation governing the establishment of medical colleges. Q: The new regulation also carried the following warning: "permission shall be withdrawn if the colleges resort to commercialization". R: With this change, corporate entities were permitted to open medical colleges. S: Since the regulation does not elaborate on what constitutes "resorting to commercialization", this will probably be a matter left to the discretion of the government.

A

PQRS

B

SRQP

C

PRQS

D

SQPR

In a power system where the voltage-control is done by Static VAR Compensator (SVC), if the power system is modeled as an equivalent voltage source VS and its equivalent system impedance XS, the SVC bus voltage VSVC and SVC current ISVC is given by the relation _______

A

VS = VSVC + ISVCXS

B

VS = VSVC – ISVCXS

C

VSVC = VS + ISVCXS

D

VS = VSVC ± ISVCXS

For a given power system, its zero and maximum regulation will occur at the impedance angle of

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