An atom in a crystal vibrates at a frequency, determined by
1. Crystal heat current
2. Crystal temperature
3. The stiffness of the bonds with neighbour atoms
Select the correct answer using the codes given below: 

Consider the following statements:
1. Nano means 10^–9 so that nano materials have an order of dimension higher than the size of atom and come in the form of rods, tubes, spheres or even thin sheets/films
2. Nano materials have enhanced of changed structural property
3. Nano elements lend themselves to mechanical processing like rolling, twisting, positioning
4. Nano elements show important electrical, magnetic and optical characteristics that are useful in electrical industry
Which of the above statements are correct? 

For a two-part reciprocal network, the three transmission parameters are A = 4, B = 7 and C = 5. What is the value of D? 

Consider the following as representations of reciprocity in terms of z-parameters:
1. z₁₁ = z₁₂                     2. z₁₂ = z₂₂
3. z₁₂ = z₂₁
Which of the above representations is/are correct? 

Kirchhoff’s current law is applicable to
1. Closed loops in a circuit
2. Junction in a circuit
3. Magnetic circuits
Which of the above is/are correct? 

Which of the following are satisfied in a non-linear network?
1. Associative               2. Superposition
3. Homogeneity             4. Bilaterality
Select the correct answer using the codes given below: 

Consider the following statements:
1. Network theorems are not derivable from Kirchhoff’s law
2. To get the Norton current, one has to short the current source
3. Thevenin’s theorem is suitable for a circuit involving voltage sources and series connections
Which of the above statements is/are correct? 

What is the octal equivalent of (5621.125)10? 

What is the hexadecimal representation of (657)₈? 

In potential transformers, the secondary turns are increased slightly and the primary and secondary windings are wound as closely as possible to compensate for 

Which one of the following methods is used for the measurement of high resistances? 

Consider the following statements with regard to induction type wattmeter:
1. Can be used on both ac and dc systems.
2. Power consumption is relatively low.
3. It is accurate only at stated frequency and temperature.
Which of the above statements is/are correct? 

A computer system has a cache with a cache access time T_C = 10 ns, a hit ratio of 80% and an average memory access time T_M = 20 ns. What is the access time for physical memory T_P? 

The minimum number of arithmetic operations required to evaluate the polynomial P(X) = X⁵+ 8X³+ X for a given value of X using only one temporary variable is 

A freewheeling diode in phase-controlled rectifiers

 What is the analog output for a 4-bit R-2R ladder DAC when input is (1000)₂, for V_ref = 5V? 

Which one of the following statements is correct? 

 A system has 14 poles and 2 zeros in its open-loop transfer function. The slope of its highest frequency asymptote in its magnitude plot is 

 The characteristics of a mode of controller are summarized:
1. If error is zero, the output from the controller is zero.
2. If error is constant in time, the output from the controller is zero.
3. For changing error in time, the output from the controller is |K|% for every 1% sec^–1 rate of change of error.
4. For positive rate of change of error, the output is also positive. The mode of controller is 

A 1000V/400vV power transformer has a nominal short-circuit voltage VSC = 40%. Which one of the following statements is correct? 

Consider the following statements:
1. Salient pole alternators have small diameters and large axial lengths.
2. Cylindrical rotor alternators have a distributed winding.
3. Cylindrical rotor alternators are wound for large number of poles.
4. Salient pole alternators run at speeds slower than cylindrical rotor machines.
Which of the above statements are correct?

A permanent magnet stepper motor with 8 poles in stator and 6 poles in rotor will have a step angle of 

Bulk power transmission over long HVDC lines is preferred because of 

The turn-off time of a thyristor is 30 µs at 50°C. What is its turn-off time at 100°C?

A large dc motor is required to control the speed of the blower from a 3-phase ac source. The suitable ac to dc converter is, 3-phase 

Consider the following statements:
1. The voltage developed across the OFF switches of the half bridge converter is the maximum dc link voltage.
2. In the full bridge converter, the voltage across the primary of the transformer is the dc link voltage.
3. The voltage developed across the OFF switches of the full bridge converter in half the maximum dc link voltage.
Which of the above statements are correct?

What is the probability that at most 5 defective fuses will be found in a box of 200 fuses, if 2% of such fuses are defective? 

At temperature above a limiting value, the energy of lattice vibrations, in a conductor, increases linearly with temperature so that resistivity increases linearly with temperature. In this region, this limiting value of temperature is called 

Consider the following statements:
1. The critical magnetic field of a superconductor is maximum at absolute zero.
2. Transition temperature of a superconductor is sensitive to its structure.
3. The critical magnetic field of a superconductor is zero at its critical temperature.
4. Superconductors show very high conductivity below the critical temperature.
Which of the above statements are correct? 
Select the correct answer using the codes given below:

Eddy current losses in transformer cores can be reduced by the use of
1. Solid cores
2. Laminated cores
3. Ferrites
Select the correct answer using he codes given below: 

The phenomenon of magnetostriction occurs when a ferromagnetic substance is magnetized resulting in 

What type of defect causes F-centers in a crystal? 

In a connected graph, the total number of branches is b and the total number of nodes is n. Then the number of links L of a co-tree is 

When 7/0.029 V.I.R cable is carrying 20 A, a drop of 1 V occurs every 12 m. The voltage drop in a 100 m run of this cable when it is carrying 10 V is nearly 

Consider the following statements: If a high Q parallel resonant circuit is loaded with a resistance
1. The circuit impedance reduces
2. The resonant frequency remains the same
3. The bandwidth reduces
Which of the above statements is/are correct? 

The three non-inductive loads of 5 kW, 3 kW and 2 kW are connected in a star network between R, Y and B phases and neutral. The line voltage is 400 V. The current in the neutral wire is nearly 

Consider the following statements with regard to Lissajous pattern on a CRO:
1. It is a stationary pattern on the CRO.
2. It is used for precise measurement of frequency of a voltage signal.
3. The ratio between frequencies of vertical and longitudinal voltage signals should be an integer to have a steady Lissajous pattern.
Which of the above statements is/are correct? 

Electric flux enclosed by a surface surrounding a charge is equal to the amount of charge enclosed.” This is the statement of 

If a positively charged body is placed inside a spherical hollow conductor, what will be the polarity of charge inside and outside the hollow conductor? 

Consider the following statements with regard to Moving Iron (MI) instruments:
1. These instruments possess high operating torque.
2. These instruments can be used in ac and dc circuits.
3. Power consumption in these instruments is lower for low voltage range.
Which of the above statements are correct? 

Consider the following components in a multistate R-C coupled amplifier:
1. Parasitic capacitance of transistor
2. Coupling capacitance
3. Stray capacitance
4. Wiring capacitance
Which of the above components effectively control high frequencies? 

A Wien Bridge Oscillator is suitable for
1. Audio frequency applications
2. Radio frequency applications
3. Very low frequency applications
Which of the above frequency applications is/ are correct? 

The number of complex additions and multiplications in direct DFT are, respectively 

While forming a Routh arrary, the situation of a row of zeros indicates that the system 

A linear time-invariant control system with unsatisfactory steady state error is to be compensated. Which is/are the correct type of cascade compensation to be provided?
1. Lead
2. Lag
3. Lag-lead
Select the correct answer using the codes given below: 

In a system, the damping coefficient is –2. The system response will be 

A dynamic system is described by the following equations:

Consider the following statements regarding capability curves of a synchronous generator:
1. The MVA loading should not exceed the generator rating.
2. The field current should not be allowed to exceed a specified value determined by field heating.
3. The MW loading should not exceed the rating of the prime mover.
4. The load angle must be more than 90°.
Which of the above statements are correct? 

Which one of the following does not have an effect on corona? 

Consider the following statements regarding corona:
1. It causes radio interference
2. It attenuates lightning surges.
3. It causes power loss.
4. It is more prevalent in the middle conductor of a transmission line employing flat conductor configuration.
Which of the above statements are correct 

Consider the following statements with regard to a GTO :
1. The turn-off gain of the GTO is large.
2. Large negative gate current pulses are required to turn off the GTO.
3. GTO has large reverse blocking capability Which of the above statements is/are correct? 

Consider the following statements with regard to power diodes:
1. The breakdown voltage is directly proportional to the doping density of the drift region.
2. Losses in the diode are less due to conductivity modulation of the drift region in the on-state.
3. The vertically oriented structure supports large blocking voltages.
Which of the above statements is/are correct? 

In a synchronous machine, hunting is predominantly damped by                         

In a 3-phase ac power transmission system using synchronous generation

A lossless power system has two generators G₁ and G₂; and total load to be served is 200 MW. The respective cost curves C₁ and C₂ are defined as C₁ = P_O1 + 0.01P²₀₁; C₂ = P₀₂ + 0.01P²_a2 :  Assume the minimum loading on any generator to be 30 MW, the most economical loads P_G1 and P_G2 for the two generators are respectively 

The loss formula coefficient matrix for a two-plant system is given by

The economic schedule for a certain load is given as
P₁ = 150 MW and P₂ = 275 MW
What is the penalty factor for plant 1 for this condition?

In 8085A microprocessor, the operation performed by the instruction LHLD 2100 H is

A power system has two synchronous generators having governor turbine characteristics as
P₁ = 50 (50 – f)
P₂ = 100(51 – f)
Where f represents the system frequency. Assuming a lossless operation of the complete power system, what is the system frequency for a total load of 800 MW?

Geneticists say that they are very close to confirming the genetic roots of psychiatric illness such as depression and schizophrenia, and consequently, that doctors will be able to eradicate these disease through early identification and gene therapy. On which of the following assumptions does the statement above rely?

A 12-pole, 440 V, 50 Hz, 3-phase synchronous motor takes a line current of 100 A at 0.8 pf leading. Neglecting losses, the torque developed will be

A 3-phase, 460 V, 6-pole, 60 Hz cylindrical rotor synchronous motor has a synchronous reactance of 2.5 and negligible armature resistance. The load torque, proportional to the square of the speed, is 398 N.m at 1200 rpm.Unity power factor is maintained by excitation control. Keeping the V/f constant, the frequency is reduced to 36 Hz. The torque angle is

Where does electro-static shielding occur in a charged spherical shell ?

Which of the following options is the closest in meaning to the phrase underlined in the sentence below?It is fascinating to see life forms cope with varied environment conditions.

A 3-phase, 50 Hz, six pole induction motor has a rotor resistance of 0.1 Ω and reactance of 0.92 Ω. Neglect the voltage drop in stator and assume that the rotor resistance is constant. Given that the full load slip is 3%, the ratio of maximum torque to full load torque is

In an oscilloscope screen, linear sweep is applied at the

A phase-lead network has its transfer function

What is the frequency at which the maximum phase-lead occurs?

For a periodic square wave, which one of the following statements is true?

The number of complex additions and multiplications in GFT are, respectively

The undesirable property of an electrical insulting material is

Fourier series of any periodic signal x(t) can be obtained if
1. 
2. Finite number of discontinuities within finite time interval t
3. Infinite number of discontinuities
Select the correct answer using the codes given below:

Consider the following statements with respect to Discrete Fourier Transform (DFT):
1. If is obtained by performing a sampling operation in the time domain.
2. It transforms a finite duration sequence into a discrete frequency spectrum.
3. It is obtained by performing a sampling operation in both time and frequency domains.
Which of the above statements is/are correct?

One of the legacies of the Roman legions was discipline. In the legions, military law prevailed and discipline was brutal. Discipline on the battlefield kept units obedient, intact and fighting, even when the odds and conditions were against them.Which one of the following statements best sums up the meaning of the above passage?
 

A periodic voltage waveform observed on an oscillating across a load is shown. A permanent Magnet Moving Coil (PMMC) meter connected across the same load reads

The logical expression, 

A tuned-collector oscillator has a fixed inductance of 100 µH and has to be tunable over the frequency band of 500 kHz to 1500 kHz. What is the range of variable capacitor to be used?

In an R-C phase shift oscillator using FET and 3-section R-C phase shift network, the condition for sustained oscillation is Where,  

Consider the following statements regarding electrical conductivity ó:
1. It increases with temperature in semiconductors.
2. Its increase with temperature is exponential.
3. It increases in metals and their alloys, linearly with temperature.
Which of the above statements are correct?

What is the effect on the natural frequency (_n) and damping factor () in the control systems when derivative compensation is used?

If n has the value 3, then the C language statement: [+ + ] = + +;  assigns

A current of (10 + 5 sin t + 3 sin 2 t)  is measured using a moving iron instrument. The reading would be

The feedback system shown below oscillates at 2 rad/s when

A 4 digit voltmeter is used for voltage measurement. How would 0.7525 V be displayed in 1 V range?

Consider the following statements regarding Peer-to-Peer computing environment:
1. In this system, clients and servers are not distinguished from one another.
2. All nodes distributed throughout the system (within) are considered Peers and each may act as either a client or a server.
3. Peer-to-Peer system assuredly offers certain advantages over the traditional client-server system.
Which of the above statements are correct?

Assuming both the voltage sources are in phase, the value of R for which maximum power is transferred from circuit A to circuit B is

Suppose the resistors R₁ and R₂ are connected in parallel to give an equivalent resistor R. if resistors R₁ and R₂ have tolerance of 1% each, the equivalent resistor R for resistors R₁ = 300 Ω and R₂ = 200Ω will have tolerance of                                                                                                            

In the circuit shown, an ideal switch S is operated at 100 kHz with a duty ratio of 50%. Given that  is 1.6 A peak-to-peak and  is 5A DC, the peak current in S is

A drawn wire of resistance 5 is further drawn so that its diameter becomes one-fifth of the original. What is its resistance with volume remaining the same?

The horizontally placed conductors of a single phase line operating at 50 Hz are having outside diameter of 1.6 cm, and the spacing between centres of the conductors is 6 m. the permittivity of free space is 8.854 x 10^-12 F/m. the capacitance to ground per kilometer of each line is              

How fast can be output of an OP Amp change by 10 V, if its slew rate is 1 V / µs?

A two-element series circuit is connected across an AC source given by e = 200 sin(314t 20)V . The current is then found to be i = 10 cos(314t25)V. The parameters of the circuit are

Who built Kallanai acrossthe river Kaveri?

Mahabalipulram wasestablished by the

In Tamil Nadu Petroleum Refinery is located at

Than javur district, the place Where a rice research station is In

The Gateway of Tamilnaduis

Who is the current Chairperson of the Union Public Service Commission ?

In which year was NITI Aayog formed ?

When is International Jaguar Day observed ?

Who will inaugurate a bust of Mahatma Gandhi at the United Nations during India’s Presidency of the UN Security Council on 14 December 2022 ?

iNCOVACC, the world’s first Intranasal Vaccine has received approval for Covid booster doses from Drugs Controller General of India. The vaccine was developed by Bharat Biotech in partnership with which of the following ?