Electrical Engineering (EE)

For the same voltage boost, the reactive power capacity is

When microwave signals follow the curvature of the earth, this is known as

In the buck-boost converter, what is the maximum value of the switch utilization - factor?

Cauer and Foster forms of realizations are used only for

Two 490 kW transformers each has a maximum efficiency of 98%, but in one the max efficiency occurs at full load while in other, it occurs at half load. Each transformer is on full load for 4 hours, on half load for 6 hours and on one tenth load for 14 hours per day

Short-circuit test is performed on a transformer with a certain impressed voltage at rated frequency. If the short-circuit test is now performed with the same magnitude of impressed voltage but at a frequency higher than the rated frequency, then

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

Q-factor of a series R-L-C circuit possessing resonant frequency of 10Hz and bandwidth of 5Hz is

The main difference between speed-time curves of main line service as compared to sub urban services in

The number of LED display indicators in logic probe are

The number of armature parallel paths in a two pole D.C. generator having duplex lap winding is

The dual of a loop is –

Which of the following conversion is incorrect?

In a PLL

The ratio of the bandwidth to the resonance frequency is called the......of the circuit.

Which one among the following has the highest numerical value in a stepper motor?

For a fault at the terminals of synchronous generator, the fault current is maximum for a

The r.m.s value and mean value is the same in the case of –

Non-metallic conduits used in internal wiring are generally made of

What is the preferred type of CB to be installed in extra high voltage ac system?

 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

Which of the following statements is not true in regard to storage time of a diode?

Which of the following ICs has only one NAND gate?

A synchronous motor is switched on to supply with its field winding shorted on themselves it will

When a given transformer is run at a its rated voltage but reduced frequency its

The changes in volume of transformer cooling oil due to variation of atmospheric tem-perature during day and night is taken care of by which part of transformer

One of the advantages of base modulation over collector modulation of a transistor class C amplifier is

Registers and counters are similar in the sense that they both

In 8085 microprocessor, how many I/O ports can be accessed by memory mapped method?

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

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 ?

For an AM wave having a power of 800 W to its carrier freqency and modulation index of 90%,the power cantent of each side bond is

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

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?

In a split phase motor

For Bode plot of (1 + jωT) has

Bundled conductors in EHV transmission system provide

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

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

The root-locus plot of the system is

In 8085 microprocessor, in order to enable RST 5.5, RST 6.5 and RST 7.5 interrupts, which of the following instruction are needed?

Which instrument has the same calibration for ac & dc values ?

The chemical effect of current is used in

A two port network is not reciprocal if

The breakdown voltage of a cable depends upon

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

Saving in power in DSB-SC system modulated at 80% is (in comparison with AM)

Which of the following constitutes an active component?

A Schottky diode has __________

Which of the following bus is used to transfer data from main memory to peripheral device?

Galloping in transmission line conductors arises generally due to

In a half bridge inverter the gate pulses of the two thyristors have a phase displacement of

The small value to drain to source voltage, JFET behaves like a

A set of independent current measurements taken by four observers was recorded as : 117.02 mA, 117.11 mA, 117.08 mA and 117.03 mA. What is the range of error ?

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

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

An AM signal is detected using an envelope detector. The carrier frequency and modulating signal frequency are 1 MHz and 2 kHz respectively. An appropriate value for the time constant of the envelope detector is

The charging current in a transmission line increases due to corona effect because corona increases

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

Assertion (A): R-2R ladder type DAC has higher speed of operation than weighted resistor DAC

Reason (R): R-2R ladder type DAC uses only two different values of resistor network uses many different values of resistors

Which one of the following statements is correct? A tunnel diode is always biased

Squired cage bars place in the rotor pole faces of an alternator help reducing hunting

A depletion type NMOS is operated in enhancement mode. V_p = - 4 volts. For V_GS = + 3 volts as V_DS is increased, I_D becomes nearly constant when V_ps equals

Which of the following statements is not true of a phasor?

A voltage 1000 sin ωt Volts is applied across YZ. Assuming ideal diodes, the voltage measured across WX in Volts is

A 2 kVA transformer has iron loss of 150 Wand full-load copper loss of 250 W. Themaximum efficiency of the transformer wouldoccur when the total loss is

The resistance of eureka wire is 2.5 W. What is the value of specific resistance of wire of 14m length and diameter of 0.14 cm

The principle of dynamically induced emf is utilised in a