Q161
Open questionWhich of the following mechanisms is NOT for removing particulate matter from gas streams.
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ECE · all questionsElectromagnetic Field Theory
Electromagnetic Field Theory
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Q162
Open questionPolarization is characteristic of EM wave that gives the direction of
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Q163
Open questionFor a transmission of wave from a dielectric medium of permittivity ε1 into a dielectric medium of lower permittivity ε2 and (ε1 > ε2) the critical angle of incidence θc (relative to the interface) is given by
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Q164
Open questionA parallel plate capacitor of 100 pF having an air dielectric is charged to 10 kV. It is then electrically isolated. The plates are pulled away from each other until the distance is ten times more than before. Estimate the energy needed to pull the plates.
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Q165
Open questionThe intrinsic impedance of free space is 377 Ω. The approximate intrinsic impedance of a medium with relative permittivity and permeability of 4 and 1 respectively will be
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Q166
Open questionIn a uniform plane wave 'E' and 'H' are related by
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Q167
Open questionIn a coaxial transmission line (εr = 1), the electric field intensity is given by:
The displacement current density is
The displacement current density is
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Q168
Open questionThe torque (in N - m) acting on a circular current loop of radius 1 mm in the xy-plane, connected at the origin and with current 0.1 A flowing in the sense of increasing φ in a magnetic field
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Q169
Open questionWhen a line short circuited at far end, the minimum voltage occurs at
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Q170
Open questionA 3 µF capacitor is charged by a constant current of 2 µA for 6 seconds. The voltage across the capacitor to the end of charging will be:
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Q171
Open questionWhen a plane wave traveling in free space is incident normally on a medium having εr = 4.0, the fraction of power transmitted into the medium is given by
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Q172
Open questionInsertion loss is defined by
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Q173
Open questionA TEM wave impinges obliquely on a dielectric-dielectric boundary with ∈r1 = 2 and
∈r2 = 1. The angle of incidence for total reflection is:
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Q174
Open questionWhich one of these equation is not Maxwell's equation for a static electromagnetic field in a linear homogeneous medium state?
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Q175
Open questionIn the following figure, the transmitter Tx sends a wideband modulated RF signal via a coaxial cable to the receiver Rx. The output impedance ZT of Tx the characteristic impedance Z0 of the cable and the input impedance ZR or Rx are all real.
Which one of the following statements is True about the distortion of the received signal due to impedance mismatch?
Which one of the following statements is True about the distortion of the received signal due to impedance mismatch?
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Q176
Open questionThe equation ∇.J = 0 is known as:
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Q177
Open questionA plane electromagnetic wave in a free space is represented by an equation.
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Q178
Open questionA transmission line having characteristic impedance 'Zt' of varying length in series with a load impedance 'ZL' appears in a Smith Chart on:
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Q179
Open questionWhen the target lies at such a distance from the radar that the radar receives the echo while it is transmitting, the target is said to be
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Q180
Open questionWhat is the magnetic field intensity vector between two parallel sheets with separation 'd' along z-axis both sheets carrying surface current
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