Which one of the following helps experimental confirmation of the Crystalline state of matter?

The electrical conductivity of pure semiconductor is:

Consider the following statements pertaining to the resistance of a conductor:
1. Resistance can be simply defined as the ratio of voltage across the conductor to the current through the conductor. This is, in fact, Georg Ohm’s law.
2. Resistance is a function of voltage and current.
3. Resistance is a function of conductor geometry and its conductivity
Which of the above statements are correct?

The ratio of ionic radii of Cations i.e.and that of Anions i.e.for stable and unstable ceramic crystal structure, is:

Which one of the following statements is correct?

In an extrinsic semiconductor the conductivity significantly depends upon:

In some substances when an electric field is applied the substance become polarized. The electrons and nucleii assume new geometrical positions and the mechanical dimensions are altered. This phenomenon is called:

In ferromagnetic materials, the net magnetic moment created due to magnetization by an applied field as:

At what temperatures domains lose their ferromagnetic properties?

Which of the following materials does not have paramagnetic properties?
1. Rare earth elements (with incomplete shell)
2. Transition elements
3. Magnesium oxide
Select the correct answer from the codes given below:

In a superconducting magnet, wires of superconducting material are embedded in the thick copper matrix, because while the material is in the superconducting state:

The crystal structure of some Ceramic materials may be thought of being composed of electrically charged Cations and Anions, instead of Atoms, and as such:

Manganin alloy used for making resistors for laboratory instruments contains:

A rolled-paper capacitor of value 0.02  is to be constructed using two strips of aluminiumof width 6 cm, and wax impregnated paper of thickness 0.06 mm whose relative permittivity is 3. The length of foil strips should be:

In a semiconductor diode, cut-in voltage is the voltage:

The transistor is operating in:

The leakage current in an NPN transistor is due to the flow of:

In Early effect:

Maximum energy of electrons liberated photo electrically is:

The response of a Gaussian random process applied to a stable linear system is:
1. A Gaussian random process
2. Not a Gaussian random process
3. Completely specified by its mean and auto covariance functions
Which of the above statements is/are correct?

Consider a system, which computes the ‘MEDIAN’ of signal value in a window of size ‘N’. Such a discrete time system is:

Consider an ideal low pass filter. Such a discrete-time system is:

In a discrete-time complex exponential sequence of frequency  the _o = 1 sequence is:
Which of the above statements is/are correct?
1. Periodic with period
2. Non-Periodic
3. Periodic for some value of period N

The varactor diode has a voltage-dependent:
1. Resistance
2. Capacitance
3. Inductance
Which of the above is/are correct?

The impulse response for the discrete-time system:
Y[n]=0.24 (x[n] + x[n-1] + x[n-2] + x[n-3]) is given by

The product of emitter efficiency (Y) and Base transport factor ( ß⁺) for a BJT is equal to:

Consider a two-sided discrete-time signal(neither left sided, nor right sided). The region of convergence (ROC) of the Z transform of the sequence is:
(a) All region of z-plane outside a unit circle (in z-plane)
(b) All region of z-plane inside a unit circle (in z-plane)
(c) Ring in z-plane
Which of the above is/are correct?

When is a function f(n) said to be left sided?  (n₀ →Positive or negative integer)

Z-transform deals with discrete time systems for their:
1. Transient behaviour
2. Steady-state behaviour
Which of the above behaviours is/are correct?

The response of a linear, time-invariant discrete-time system to a unit step input u[n] is [n]. The system response to a ramp input n u[n] would be:

Poisson’s equation is derived with the following assumption about the medium. The medium is:

A system has impulse response h[n]=cos(n) u[n]. The system is:

Loop-voltage equations of a passive circuit are given by:

Which of the above relations are correct?

For a given fixed tree of a network, the following form an independent set:
1. Branch currents
2. Link voltages
Which of the above is/ are correct?

For which one of the following measurements a thermistor can be used?

According to network graphs, the network with:
1. Only two odd vertices is traversable
2. No odd vertices is traversable
3. Two or more than two odd vertices are traversable 
Which of the above statements is/are correct?

For any lumped network, for any cut sets and at any instant of time the algebraic sum of all branch currents traversing the cut-set branches is always:

Which one of the following statements concerning Tellegen’s theorem is correct?

Consider the following statements:
1. Two identical 2^nd order Butterworth LP filters when connected in cascade will make a 4^th order Butterworth LP filter.
2. A high 2^nd order filter will exhibit a peak if Q exceeds certain value.
3. A band pass filter cannot be of order one.
4.A network consists of an amplifier of real gain A and a  network in cascade with each other. The network will generate sinusoidal oscillations if the  network is a first order LP filter.
Which of the above statements are correct?

The lowest and the highest critical frequencies of RC driving point admittance are, respectively

The driving point impedance of the circuit shown is given by

The component values of R, L and C are respectively:

Which of the above is/are realizable?

Consider the following statements:
1. The magnetic field at the centre of a circular coil of a wire carrying current is inversely proportional to the radius of the coil
2. Lifting power of a magnet is proportional to square of magnetic flux density
3. A static electric field is conservative (irrotational)
4. If the divergence of a vector ‘A’ is zero, then vector ‘A’ can be expressed as Curl of a vector F

Consider the following:
1. Electric current flowing in a conducting wire
2. A moving charged belt
3. An electron beams in a cathode ray tube
4. Electron movement in a vacuum tube
Which of the above are examples of convection current?

Consider the following sources:
1. A permanent magnet
2. A charged disc rotating at uniform speed
3. An accelerated charge
4. An electric field which changes linearly with time
Which of the above are the sources of steady magnetic field

A charge Q is enclosed by a Gaussian spherical surface of radius R. If R is doubled then the outward flux is:

An electrostatic force between two point charges increases when they are:

Consider the following statements regarding a conductor and free space boundary:
1. No charge and no electric field can exist at any point within the interior of a conductor
2. Charge may appear on the surface of a conductor
Which of the above statements are correct?

Precision is composed of two characteristics, one is the number of significant figures to which a measurement may be made, the other is

A plane wave in free space has a magnetic field intensity of 0.2 A/m in the Y direction. The wave is propagating in the Z-direction with a frequency of 3 GHz. The wavelength and amplitude of the electric field intensity are, respectively