Electrical Engineering (EE)

The positive-sequence current for a L-L fault of a 2kV system is 1,400 A, and corresponding current for a L-L-G fault is 2,220 A.

The zero-sequence impedance of the system is

The breakdown voltage of a cable depends upon

When transistors are used in digital circuits they usually operate in the

Which of the following device can be used as a phase advancer ?

When electromagnetic waves are reflected at an angle from a wall, their wave-length along the wall is

A Wien-bridge is used to measure the frequency of the input signal. However, the input signal has 10% third harmonic distortion. Specifically the signal is 2 sin 400 πt + 0.2 sin 1200 πt (with t insec). With this input the balance will

The maximum short circuit current occurs in case of

A modulated signal is given by,

s(t) = m₁(t) cos (2 π f_ct) + m₂(t) sin (2 π f_ct)

where the baseband signal m₁(t) and m₂(t) have bandwidths of 10 kHz and 15 kHz respectively. The bandwidth of the modulated signal, in kHz, is

The welding transformer used in resistance welding will

With regard to the filtering property, the lead compensator and the lag compensator are, respectively.

As a result of reflections from a plane conducting wall, electromagnetic waves acquire an apparent velocity greater greater than the velocity of light in space. This is called the

In the potentiometer circuit shown in the given figure, the value of unknown voltage ‘E’ under balanced condition will be

The direct.form-II realisation of []R filter is shown below.

The transfer function is

A single-phase full-bridge diode rectifier delivers a constant load current of 20 A. The rms and average values of source current are respectively

The impurity commonly used for realizing the base region of a silicon n-p-n transistor is

Statement for Linked Answer Questions: 62 & 63

In the following network, the voltage magnitudes at all buses are equal to 1 pu, the voltage phase angles are very small, and the line resistances are negligible. All the line reactances are equal to j1

The voltage phase angles in rad at buses 2 and 3 are

Bandwidth of a series resonant circuit is given by

Consider the following statements:
1. A decoder with a data input is called a demultiplexer.
2. An octal decoder with active-LOW outputs will output seven LOWs and one HIGH for each combination of inputs.
3. A hexadecimal decoder is sometimes called a 4-line-to-10-line decoder.
4. The Gray code is not a BCD-type code.
Which of the statements given above are not correct?

A all pass causal LTI system is described by the difference equation:
y[n] - ay[n - 1] = bx[n] + x [n - 1]
The value of ’b’ will be

For successful parallel operation of two singlephase transformers, the most essential condition is that their

Statement: There were different streams of freedom movements in colonial India carried out by the moderates, liberals, radicals, socialists, and so on. Which one of the following is the best inference from the above statement?

Equalising pulses in TV are sent during

A directional coupler with three or more holes is sometimes used in preference to the two-hole coupler

In the circuit shown below the op-amps are ideal. Then V_out  in Volts is

Open loop transfer function of a system having one zero with a positive real value is called

The current through a series RLC circuit under resonance condition will be

The industrial controller having the best steady - state accuracy is

The data sheet for a certain JFET (Junction Field Effect Transistor) indicates that I_DSS (drain to source current with gate shorted) = 15 mA and V_GS (off) (Cut – off value of gate to source voltage) = – 5V.

Which one of the following causes phase shift through causes phase shift through an op-amp?

Cables for 220 KV lines are invariably

If the separation between the three phase of a transmission line is increased then

The colour of fresh dielectric oil used intransformers is

In a 3-phase squirrel cage induction motor, applied voltage is reduced to x times its rated value. Then, its starting line current from mains and starting torque by auto-transformer starting would reduce respectively from their corresponding direct switching values by a factor of

For a pure capacitor, the voltage current relationship is

If Pc & Psc represent core & full-load ohmic losses respectively, the maximum KVAdelivered to load corresponding to maximum efficiency is equal to rated KVA multiplied by

The binary equivalent of 4096.90625 is

(Q.4-Q.5) A parallel resonant circuit has a midband admittance of 25 X 10(-3) S, quality factor of 80 and a resonant frequency of 200 krad s.4. The value of R (in ohm) is

Galloping in transmission line conductors arises generally due to

The value of inductor is

The quality factor is

Three memory chips are of size 1 KB, 2 KB and 4 KB. Their address bus is 10 bits, What are the data bus sizes of the chips ?

For a unity negative feedback control system, the open loop transfer function is

The root-locus plot of the system is

The z-transform of F(z) of the function f(nT) = a^nT is

In a power house, illumination should be approximately ............

Arcing voltage will be the least in case of

Match List- I (Connection) with List-ll (Equivalent inductance) and select the correct answer using the codes given below the lists:

Codes:

Match List- I (Laplace transforms) with List - II (Time functions) and select the correct answer using the codes aiven below the lists:

Codes:

For which of the following x[n] cannot find z-transform x(z).

In 8085 microprocessor, which of the following is not vectored interrupt?

The driving power from the prime mover driving the alternator is lost but the alternator remainsconnected to the supply network and the field supply also remains on. The alternator will

Kick fuses are used across relay coils to prevent relay operation during

An industrial installation has a power factor of 0.8 lagging. It would be economical to improve pf to

Speed torque characteristic of a repulsion induction motor is similar to that of a D.C.

The Hartley-Shannon theorem sets a limit on the

Consider the following statements:

In 8085 microprocessor, data - bus and addressbus are multiplexed in order to

1. Increase the speed of microprocessor

2. Reduce the number of pins.

3. Connect more peripheral chips.

Which of the above statement is/are correct?

The piecewise linear V - I characteristic of a diode is shown in the given figure. When the applied voltage is 6V the current through the diode will be

The frequency of the induced emf in an induction motor is

In germanium at room temperature, the forbidden energy gap E_G is about

The resistance of earth should be

Typical specifications for design stipulates the gain margin and phase margin to be respectively

 A wire 2.5m long is bent into a square. A current of 100 A flowing through the wire will producea magnetising force at the centre of the square,equal to

Consider the following statements:
1. The effect of feedback is to reduce the system error.
2. Feedback increases the gain of the system in one frequency range but decreases in another.
3. Feedback can cause a system that is originally stable to become unstable.
Which of these statements are correct ?

The capacitance and loss angle of a given capacitor specimen are best measured by

Most SCRs can be turned-off by voltage reversal during negative half cycle of the ac supply for

The positive sequence current for a L-L fault of a 2 kV system is 1400 A, and corresponding current for a L-L-G fault is 2220 A. The zero sequence impedance of the system is

For a unity negative feedback control system, the open loop transfer function is

The root-locus plot of the system is

An open loop system has a transfer function it is converted into a closed loop system by providing a negative feedback having transfer function 20 (s+ 1). Which one of the following is correct ? The open loop and closed loop systems are, respectively