Electrical Engineering (EE)

Calculate the equivalent resistance between A and B.

 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

A synchronous capacitor is an over-excited motor running at

In a 3-core extra-high voltage cable, a metallic screen around each core-insulation is provided to

 Ib = ?

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

Least expensive instrument for dc measurement is

In fluorescent tube, a ballast resistance is connected in series with the choke

Match List- I (Theorem/Law) with List- II (Property) and select the correct answer using the codes given below the lists:
List - I
A. Norton’s theorem
B. Superposition theorem
C. Thevenin’s theorem
D. Kirchhoff’s current law
List - II
1. Effects of independent sources in a linear circuit are additive.
2. Law of non-accumulation of charge holds good at nodes.
3. Current source with shunt resistor.
4. Voltage source with series resistor.
Codes:

 The initial value theorem does not hold good for which of the following functions?

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

The Hartley-Shannon theorem sets a limit on the

Which of the following operation are performed on linear queues?

If R, L and C are the parameters of resistors. What is the condition for the resistor to benon-inductive ?

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

According to fuse law, the current carrying capacity varies as

The purpose of providing an iron core in a transformer is to

The operating characteristic of a distance relay in the R-X plane is shown in the figure. It represents operating characteristic of a

A 2-terminal network consist of one of the RLC elements. The element is connected to an ac supply. The current through the element is IA when an inductor is inserted in series between the source and element 2IA the current through the element becomes. What is this element ?

In PNP transistor, with normal bias, the emitter junction is

A full adder is to be implemented using half adders and OR gates. A 4 bit parallel adder without any initial carry requires

A single – Phase, 200 V alternator has armature resistance and reactance of 0.8W and 4.94W respectively. The voltage regulation of the alternator at 100 A load at 0.8 leading power factor 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

In connection with arc the extinction in circuit breaker, resistance switching is employed where in a resistance is placed in parallel with the poles of the circuit breaker as shown in the figure. This process introduces damping in the LC circuit. For critical damping, the value of 'R' should be equal to

When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop

To measure current in the MHz range we use instrument of

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

Thermal runaway is not encountered product

For the circuit shown in the figure, what is the frequency of the output Q?

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

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

Guard circuits are used in insulation resistance measurements to

Which of the following statements associated with an ac series motor is incorrect?

A2-phase circuit breaker is rated at 2000 MVA. 33kV; its making current will be

Galloping in transmission line conductors arises generally due to

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

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

What bandwidth is needed for an FM signal thathas a peak deviation of ± 3 kHz and handleraudio signals from 200 Hz to 5 kHz.

A d.c. to d.c. chopper operates from a 48 V battery source into a resistive load
of 24 f~. The frequency of the chopper is set to 250Hz. What is the average
and rms load current and load power values when (a) chopper on-time is 1 ms,
(b) chopper on-time is 3 ms.

The octal equivalent of decimal 98 is

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

While using air-blast circuit beaker, current chopping is a phenomenon often observed when

The open loop poles of a third order unity feedback system are at 0,-1,-2. Let the frequency corresponding to the point where the root locus of the system transits to unstable region be K. Now suppose we introduce a zero in the open loop transfer function at -3, while keeping all the earlier open loop poles intact. Which one of the following is TRUE about the point where the root locus of the modified system transits to unstable region?

In a modem digital computer, a subtractor in normally not used because

If the megger terminals are connected to 230 V supply, megger will

The rating of fuse wire is always expressed in

At a given probability of error, binary coherent FSK is inferior to binary coherent PSK by

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

Thermal runaway will take place if the quiescent point is such that

The dependent current source shown in figure

The power output from an hydroelectric power plant depends on

The maximum short circuit current occurs in case of

Consider the circuit as shown below

The Q factor of the inductor is equal to

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

Double revolving field theory is based on the idea that pulsating field produced in single phase motors can be resolved into two components of ______ its amplitude and rotating in______ direction with synchronous sped .

In a 2^nd order system, the peak over shoot is 100%, the value of damping factor is _____

 

 

If two induction motors A and B are identical except that the airgap of motor 'A' is 50% greater than that of motor 'B' then

A PIN diode is

Mutual inductance between two magnetically coupled coils depends on the

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

The working of a synchronous motor is similar to

Armature reaction in a generator results in

Why is armature of a dc machine made of silicon steel stampings?

The voltage drop in terminal voltage from no-load to full load in a shunt generator can be compenated using

For a given dc generator, the external characteristic is plotted . Without using further plots, how can we obtain internal characteristic?

The air gap line represents

Armature characteristic is also known as

A student forgot to mark the x-y axes in his experiments but he just noted down the cause and the effect for each. How will he conclude about the armaturecharacteristic out of the all plotted graphs?

The external characteristic is plotted between

Choose the most inappropriate out of the following for the no-load characteristics of the dc generator.

Which of the following characteristics reveal about the magnetization nature of the machine?

If the magnitude of closed loop transfer function of a system is given by M, then the centre and radius of M-circle will be respectively given by:

 An Inductor works as a ________ circuit for DC supply.