Electrical Engineering (EE)

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

A chopper cannot be line commutated.

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

Which property of delta function indicates the equality between the area under the product of function with shifted impulse and the value of function located at unit impulse instant ?

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

Which of the following d.c. generator cannot build up on open-circuit?

In an Anderson bridge, the unknown inductance is measured in term of known

For a particular type of memory the access time and cycle time are 200 ns each. The maximum rate at which data can be accessed by

A small capacitance is added to a highly inductive circuit

For the same voltage boost, the reactive power capacity is

The industrial controller having the best steady - state accuracy is

Match List-I (Name of test) with List-II (Result) and select the correct code given below the lists: 
List-I
A. Open Circuit and short circuit test
B. Open circuit and zero power factor test
C. Slip test
D. Maximum lagging current test
List-II
1. Leakage reactance
2. Direct axis synchronous reactance
3. Quadrature axis synchronous reactance
4. Ratio of direct axis synchronous reactance to quadrature axis synchronous reactance

A piece of oil soaked paper has been inserted between the plates of a parallel plate capacitor.Then the potential difference between the plates will

In a JFET, drain current is primarily controlled by

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

A microprocessor with a 16-bit address bus is used in a linear memory selection configuration (i.e., Address bus lines are directly used as chip selects of memory chips) with 4 memory chips. The maximum addressable memory space is

A motor is coupled to a load through gear ratio n. If T is the motor torque, J_m and J_L are moment of inertia of rotor and load, then torque to inertia ratio referred to motor shaft is

In 8085 microprocessor, an active low signal INTA is not needed from up service which of the following interrupt request?

The rate of change of digital signals between High and Low level is

In arc welding, the voltage on ac supply system is in the range

Two magnetically uncoupled inductive coils have Q factors q₁ and q₂ at the chosen operating frequency. Their respective resistances are R₁ and R₁. When connected in series, their effective Q factor at the same operating frequency is

Which of the following circuit component opposes the change in the circuit voltage–
 

Guard circuits are used in insulation resistance measurements to

A small signal voltage amplifier in common emitter configuration was working satisfactorily.Suddenly its emitter-bypass capacitor (CE) got disconnected. Its:

1. Voltage gain will decrease

2. Voltage gain will increase

3. Bandwidth will decreases

4. Bandwidth will increase

Which of these statements are correct?

Match List-I with List-II and select the correct answer using the codes given below the lists:

The power development programmes that are possible in Tamil Nadu are largely based on

In a single tank system, the transfer function of level to inlet flow rate is

In a thyrite lightning arrester the resistance

In switching devices, gold doping is used to

The illumination level in houses is in the range

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

In the circuit of figure β = 50 and V_BE = 0.5 V. The quiescent value of base current I_B is

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

A 50 Hz, 11 kV, 3 phase alternator with earthed neutral having a reactance of 3 ohms per phase and is connected to a bus bar through a circuit breaker, if the distributed capacitance upto CB between the phase and neutral is 0.01 μ F.

What is the peak re striking voltage?

The Voltage Source Inverter (VSI) shown in the figure below is switched to provide a 50Hz, square wave ac output voltage v_o across an RL load. Reference polarity of v_o and reference direction of the output current i_o are indicated in the figure. It is given that R = 3 ohms, L = 9.55mH.

Appropriate transition i.e., Zero Voltage Switching (ZVS) / Zero Current Switching (ZCS) of the IGBTs during turn-on / turn-off is

A supply voltage of 230V, 50 Hz is fed to a residential welding. Write down its equation for instantaneous value

The type of protection that does not respond to faults occurring beyond its zone even though the fault current may pass through the zone is

In a synchronous motor, the breakdown torque is

The action of JFET in its equivalent circuit can best be represented as a

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 ?

In a CRT the highest positive potential is given to

Which one of the following is not a property of root loci ?

Power factor of an alternator driven by constant prime mover input can be changed by changing its

Equalising pulses in TV are sent during

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 equivalent circuit of the inductor shown below is 

The use of electronic instruments is becoming more extensive because they have

Which portion of the power system is least prone to faults ?

Zero sequence current can flow from a line into a transformer bank if the windings are in

Whenever the conductors are dead-ended or there is a change in the direction of transmission line, the insulators used are of the

The number of discs in a string of insulators for 400 kV ac overhead transmission line lies in the range of

Two -insulator discs of identical capacitance value C makes up a string for a 22 kV, 50 Hz,single-phase overhead line insulation system. If the pin to earth capacitance is also C, then the string efficiency is

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

The number of LED display indicators in logic probe are

The photo electric current in amperes per watt of incident light depend on

As compared to full wave rectifier using two diodes, the four diode bridge rectifier has the dominant advantage of

The number of significant figures in the two resistors having resistances 4 x 10⁶ kΩ and 0.345 kΩ are respectively

Which portion of the transmission system is more prone to faults ?

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

In dc series motor 1 shaft torque is less than the armature torque due to

If the number of conductors and speed of a lap wound generator is doubled then the generated emf will be

In a capacitor start single-phase motor, when capacitor is replaced by a resistance

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

Codes: