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

                 

For the intrinsic gallium-arsenide, the conductivity at room temperature 25°C is 10^-6 (ohm-m)^-1, the electron and hole nobilities are 0.85 m²/V-s and 0.04 m²/V-s respectively. What is the intrinsic carrier concentration at the room temperature?

The resistivity of intrinsic germanium at 30°C is 0.46 –m. What is the intrinsic carrier density at 30°C if the electron mobility is 0.38 m²/V-s and the hole mobility is 0.18 m²/V-s?

Heat conduction in a semiconductor takes place

Brewster angle is the angle when a wave is incident on the surface of a perfect dielectric at which there is no reflected wave and the incident wave is

An electrical breakdown of a p-n junction occurs if

The chief deterrent to the widespread application of superconducting materials is

Which one of the following properties is not observed in the carbon nanotubes ?

The evidence for the importance of electron-phonon interaction in super-conductors comes from

Which one of the following materials is used for cable insulation ?

For high speed reading and storing of information in a computer, the material used is

The temperature above which an anti-ferromagnetic material becomes paramagnetic is called

Which effect is the converse of Peltier effect ?

Magnetic materials which may be readily magnetized in either direction are

Consider the following statements regarding a ferromagnetic material:
1.Below the ferromagnetic Curie temperature, the ferromagnetic materials exhibit hysteresis effect.
2.The coercive force is the filed required to reduce the flux density to zero. 
Which of the above statements is/are correct?

The impact ionization phenomenon in semiconductor may be viewed as the reverse process of

Refractive index of a slice glass can be reduced by doping it with tiny amount of

If a diameter of a copper wire is increased by two times keeping its terminal voltage same, then the drift velocity will

In an induction type energy meter, the steady speed attained by the rotating disc is
1.Proportional to the deflecting torque.
2.Proportional to the resistance of the path of eddy currents.
3.Inversely proportional to the effective readings of disc from its axis.
4.Inversely proportional to the square of brake magnetic flux. 
Which of the above are correct?

If ‘KCLFTSB’ stands for ‘best of  luck’ and ‘SHSWDG’ stands for ‘good wishes’, which of the following indicates ‘ace the exam’?

Consider  the following statements associated with the basic electrostatic properties of ideal conductors:
1.The resultant field inside is zero.
2.The net charge density in the interior is zero.
3.Any net charges reside on the surface.
4.The surface is always equipotential.
5.The field just outside is zero. 
Which of the above statements are correct?

A semiconductor device made out of a material having very high temperature coefficient of resistance is

The electrical conductivity of a semiconductor increases with increase in temperature because

Which of the following are associated with soft superconductors?
1.Silsbee’s rule
2.Meissner effect
3.Faraday rotation
4.Curie-Weiss law

In a two-channel oscilloscope operating in x-y mode, two in-phase 50 Hz sinusoidal waveforms of equal amplitude are fed to the two channels. What will be the resultant pattern on the screen?

Resistance switching is normally resorted in case of

By transmitting power at high voltage

Which statement about the daily load curve is valid ?

High voltage Schring bridge is used to measure

Draw - in - system of laying underground cables has the drawback (s) of

Surge impedance of a transmission line is

If two synchronous generators connected in parallel loose synchronism, it will lead to

A differential relay responds to

The conductor carries more current on the surface in comparison to its core. This phenomenon is called the

A booster is connected in

Fuses have got advantages of

The power transmitted will be maximum when

The connected load of a consumer is 2 kW and his maximum demand is 1.5 kW. The load factor of the consumer is

In a transformer, the exciting current will be in phase quadrature with the impressed voltage provided

Which of the following techniques is used for the measurements of a.c. high frequency voltages ?

Use of additional shunt capacitor can be made for increasing the capability of line as it

The sag of a transmission line is least affected owing to

In case of Impulse Thermal break down of solid insulating materials, the critical electric field is proportional to

The insulation of the modern EHV lines is designed based on

For constant voltage transmission, the voltage drop along the line is maintained constant by installing

AC network analyser is employed for solving the problems of

The change in excitation in an alternator connected to an infinite line provides a corresponding change in

Different types of insulators used for transmission lines are

The conductor connecting consumer's terminals to the distributor is called the

Which of the following method or techniques can be used for the measurement of high d.c. voltages ?