101. An iron specimen has µr = 1000 when B = 0.3 T. If B = 0.35 T, µr
102. Which solid dielectric has highest temperature limit?
103. Permeability is analogous to
104. The colour code on a carbon resistor is green-blue-yellow. The tolerance is
105. The resistivity of intrinsic semiconductors, at room temperature, is of the order of
106. Assertion (A): Ferromagnetic materials possess ferromagnetic properties only when temperature is less than paramagnetic curie temperature.Reason (R): For a ferromagnetic material for T > θf.
107. In terms of classical representation of electrons
108. To produce magnetic flux, mmf is necessary.
109. ‘Malta Vilasa Prahansa’ was written during the period of?
110. The relaxation time of electrons in a metal is of the order of
111. Assertion (A): For elemental dielectrics, P = Na eEi where N is number of atoms/m3, P is polarization, a e is electronic polarization and Ei is internal electric field.Reason (R): In elemental dielectrics there are no permanent dipoles or ions.
112. The circumference of an electron orbit is equal to integer times the wavelength of electron.
113. In a specimen of silicon steel, a field strength of 200 A/m causes a flux density of 0.5 T. In a specimen of cast iron, the same H would cause B to be
114. In a rare gas, the molecules of some atoms have an excess positive or negative charge. The electric field tends to shift positive ions relative to negative ions. This is known as ionic polarization.
115. The first president of Indian National Congress?
116. A liquid has N permanent dipoles μp per unit volume and has been subjected to dc field for a long time such that orientation polarization is P0. At t = 0, the field is suddenly removed, then polarization
117. Assertion (A): Orbital magnetic moment of an electron in an atom is of the order of 1 Bohr magneton.Reason (R): 1 Bohr magneton = 9.27 x 10-24 A/m2.
118. As per Bohr's postulate, only those circular orbits are stable for which the angular momentum is equal to an integer times .
119. Inductors used at V.H.F. are made using
120. If a capacitor C having selectivity factor Q is scaled down in all its dimensions by a factor K without any altering the dielectric material, the new capacitor will have capacitance and selectivity as
121. The hysteresis loss is
122. The Protestant Reformation started primarily because of the action of?
123. Assertion (A): For a magnetic material M = (μr - 1) H, where M is magnetic dipole moment/m3, H is field intensity A/m and μr is relative permeability.Reason (R): μr can have any value from 0 to hundreds of thousands.
124. As regards ∈0 and ∈r (absolute and relative permittivity)