72101. If a EM wave propagating in z direction then
72102. The thin parallel wires are carrying current along the same direction. The force experienced by one due to the other is
72103. Mutual impedance is not depend upon
72104. The dimension of flux density is
72105. An alternating current or voltage is that which
72106. When the magnetic vector is parallel to the boundary surface and electric vector is parallel to the place of incidence, the polarization is
72107. The total electrical energy emitted overall space from an electron of charge e and radius r is
72108. In broadside array
72109. Which of following antenna does not depend upon the frequency?
72110. For a distortionless line, the parameters are related as
72111. A field can be
72112. Phase velocity of waves propagating in a hollow metal waveguide is
72113. If a plane electromagnetic wave satisfies the equation , the wave propagates in the (at an angle of 45° between the x and z direction)
72114. Good smoothing factor of a coil depends on
72115. MUF is given by
72116. A waveguide behave as
72117. Radar antennas are usually
72118. The radio horizon for space waves is about three-fourth as for as the optical horizon.
72119. Triatics are
72120. Which of the following is abnormal variation in ionosphere?
72121. Troposphere is the upper part of the Earth's atmosphere which absorbs large quantities of Sun's radiations.
72122. For resonant long wire antenna 'n' half wavelength long in free space, if 'n' is increased then inclination of the major lobe with wire axis will __________ .
72123. The maximum effective aperture of λ/2 (half-wave) antenna is
72124. Zoning is used with a dielectric antenna in order to
72125. For aeroplane and navigation frequency band is
72126. Poynting vector signifies which of the following?
72127. Which one is correct?
72128. When a magnetic circuit is compared with an electric circuit, the equivalent of the magnetic flux is
72129. A TEM wave incident obliquely on a dielectric boundary with εr1 = 2 and εr2 = 1, the angle of incidence for total reflection is
72130. The total field produced by an antenna array system at a distance from it is
72131. A perfect conductor is a perfect absorber of electromagnetic waves.
72132. In a lead acid cell the density of the acid gives an indication of
72133. A (0.75 - j50) ohm load is connected to a coaxial transmission line of Z0 = 75 ohms at a frequency of 10 GHz Which of the following will be the best method of matching?
72134. Ground wave propagation is useful for
72135. Radiowaves are electromagnetic waves having frequency range
72136. When a line of any odd multiple of a quarter wavelength is short-circuited it represents
72137. An antenna is considered to be in free space where its height above the ground is
72138. In waveguide Degenerate modes are
72139. Microwave signals follow the curvature of the earth and the phenomenon is known as
72140. In a carbon-zinc cell the function of the depolarizer is that
72141. Induction and radiation fields are equal at a distance equal to
72142. The effective height of an antenna is slightly greater than physical height because
72143. A long periodic antenna is a
72144. In a four element Yagi-Uda antenna
72145. The statement that the line integral of magnetic field about any closed path is exactly equal to the direct current enclosed by that path, is known as
72146. Transverse magnetic (TM) waves have
72147. UHF and microwaves in the frequency range 300 MHz to 30 GHz can be best transmitted using __________ propagation
72148. The directive gain of λ/2 resonant wire is 1.64.
72149. The effective height of a vertical radiator can be increased by
72150. When an electromagnetic wave travelling in one medium strikes upon a second medium (having a different conductivity) the wave will be
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