AExE/Chapter 6/Read MCQs
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Chapter 6 · MCQ Read Mode

Electromagnetic Waves and Propagation

AEXE06·80 Total MCQs
Question 1 of 80Electric field

Electric field intensity E is defined as:

ACharge per unit volume
BForce per unit positive charge
CFlux per unit area only
DPotential per unit distance squared
Answer is hidden
Question 2 of 80Electric field

The divergence theorem relates a surface integral to:

AA line integral
BA volume integral of the divergence
CA point charge value only
DA magnetic field integral
Answer is hidden
Question 3 of 80Electric field

Electric potential V relates to electric field E by:

AE = ∇V
BE = −∇V (potential gradient)
CE = V²
DThere is no relation
Answer is hidden
Question 4 of 80Electric field

The energy density stored in an electrostatic field is given by:

Aw = εE
Bw = ½εE²
Cw = E/ε
Dw = ε²E
Answer is hidden
Question 5 of 80Electric field

An electric dipole's strength is characterized by its:

ATotal charge only
BDipole moment, p = Qd
CRelative permittivity
DRelaxation time
Answer is hidden
Question 6 of 80Electric field

Bound charges, unlike free charges, are:

AAble to move freely through a conductor
BLocked in place within atoms/molecules but can shift slightly (polarize)
CAlways zero in any material
DFound only in perfect conductors
Answer is hidden
Question 7 of 80Electric field

The continuity equation, ∇·J = −∂ρ/∂t, expresses:

AConservation of energy
BConservation of charge
CConservation of momentum
DNewton's second law
Answer is hidden
Question 8 of 80Electric field

Relaxation time in a conductor represents:

AThe time for a wave to travel one wavelength
BThe time constant for excess charge to dissipate to the surface
CThe period of an AC signal
DThe time for a dipole to form
Answer is hidden
Question 9 of 80Electric field

Laplace's equation, ∇²V = 0, applies to a region that is:

AFilled uniformly with charge
BFree of charge
CA perfect conductor only
DAlways time-varying
Answer is hidden
Question 10 of 80Electric field

The uniqueness theorem in electrostatics guarantees that:

AMultiple different solutions can satisfy the same boundary conditions
BA solution satisfying the given boundary conditions is the only correct solution
CBoundary conditions are irrelevant
DLaplace's equation has no solution
Answer is hidden
Question 11 of 80Magnetic field

Biot-Savart's law is used to determine:

AThe electric field from a point charge
BThe magnetic field produced by a current element
CThe potential at infinity
DThe relaxation time of a conductor
Answer is hidden
Question 12 of 80Magnetic field

Ampere's circuital law states that the line integral of H around a closed path equals:

AZero always
BThe current enclosed by the path
CThe electric flux through the path
DThe magnetic flux density at the center
Answer is hidden
Question 13 of 80Magnetic field

A non-zero curl of a vector field indicates:

AThe field has a source or sink there
BThe field has a rotational (circulating) tendency at that point
CThe field is exactly zero
DThe field is purely radial
Answer is hidden
Question 14 of 80Magnetic field

Stoke's theorem converts a closed line integral into:

AA volume integral of divergence
BA surface integral of the curl
CA point charge calculation
DA scalar potential difference
Answer is hidden
Question 15 of 80Magnetic field

The magnetic force on a moving charge (F = qv×B) is always:

AParallel to the velocity
BPerpendicular to both velocity and magnetic field
CParallel to the magnetic field only
DZero regardless of velocity
Answer is hidden
Question 16 of 80Magnetic field

The force on a current-carrying conductor in a magnetic field is given by:

AF = qE
BF = IL × B
CF = ½εE²
DF = μ₀H
Answer is hidden
Question 17 of 80Magnetic field

The magnetic dipole moment of a current loop is given by:

Am = Qd
Bm = IA
Cm = εE
Dm = σA
Answer is hidden
Question 18 of 80Magnetic field

Magnetization (M) is defined as:

AMagnetic field intensity itself
BMagnetic dipole moment per unit volume induced in a material
CThe relaxation time of a magnetic material
DElectric flux density
Answer is hidden
Question 19 of 80Magnetic field

At a boundary between two media (no surface current), which component of H is continuous?

AThe normal component
BThe tangential component
CNeither component
DBoth are always discontinuous
Answer is hidden
Question 20 of 80Magnetic field

At any boundary between two media, which component of B is always continuous?

AThe tangential component
BThe normal component
CNeither component
DB is never continuous
Answer is hidden
Question 21 of 80Wave equation and wave propagation

Displacement current was introduced by Maxwell to:

AReplace conduction current entirely
BFix an inconsistency in Ampere's law for time-varying fields
CEliminate the need for Faraday's law
DIncrease the speed of light
Answer is hidden
Question 22 of 80Wave equation and wave propagation

Which Maxwell's equation states that no isolated magnetic monopoles exist?

A∇·D = ρ
B∇·B = 0
C∇×E = −∂B/∂t
D∇×H = J
Answer is hidden
Question 23 of 80Wave equation and wave propagation

Faraday's law in point form is expressed as:

A∇·D = ρ
B∇×E = −∂B/∂t
C∇×H = J + ∂D/∂t
D∇·B = 0
Answer is hidden
Question 24 of 80Wave equation and wave propagation

In a lossless dielectric, a propagating plane wave:

AAttenuates rapidly
BPropagates without attenuation, with E and H in phase
CCannot exist
DHas a complex propagation constant only
Answer is hidden
Question 25 of 80Wave equation and wave propagation

In a good conductor, a propagating electromagnetic wave:

APropagates without any loss
BAttenuates very rapidly due to the skin effect
CHas E and H exactly in phase
DCannot be described by Maxwell's equations
Answer is hidden
Question 26 of 80Wave equation and wave propagation

Skin depth in a good conductor refers to:

AThe total thickness of the conductor
BThe depth at which the wave amplitude falls to 1/e of its surface value
CThe wavelength in free space
DThe Brewster angle
Answer is hidden
Question 27 of 80Wave equation and wave propagation

The propagation constant γ = α + jβ in a lossy medium includes:

AOnly a phase constant
BBoth an attenuation constant (α) and a phase constant (β)
COnly an attenuation constant
DNeither attenuation nor phase information
Answer is hidden
Question 28 of 80Wave equation and wave propagation

The Brewster angle refers to the angle of incidence at which:

ATotal internal reflection occurs
BReflection is zero for parallel-polarized incident waves
CThe wave travels fastest
DSkin depth is maximum
Answer is hidden
Question 29 of 80Wave equation and wave propagation

Total internal reflection occurs when the angle of incidence:

AIs less than the critical angle
BExceeds the critical angle, at a boundary going from denser to less dense medium
CEquals exactly 0°
DIs irrelevant to reflection
Answer is hidden
Question 30 of 80Wave equation and wave propagation

Oblique incidence of a plane wave at a boundary is governed by:

AOhm's law
BSnell's law
CKirchhoff's law
DCoulomb's law
Answer is hidden
Question 31 of 80Wave-guides and antenna

A rectangular waveguide, unlike a coaxial cable, cannot support which propagation mode?

ATE mode
BTM mode
CTEM (Transverse Electromagnetic) mode
DIt supports all modes equally
Answer is hidden
Question 32 of 80Wave-guides and antenna

In TE (Transverse Electric) mode, which field component is zero in the direction of propagation?

AThe magnetic field component
BThe electric field component
CBoth fields are zero
DNeither field is zero
Answer is hidden
Question 33 of 80Wave-guides and antenna

In TM (Transverse Magnetic) mode, which field component is zero in the direction of propagation?

AThe electric field component
BThe magnetic field component
CBoth fields are zero
DNeither field is zero
Answer is hidden
Question 34 of 80Wave-guides and antenna

The dominant mode in a rectangular waveguide is generally:

ATM₁₁
BTE₁₀, having the lowest cutoff frequency
CTEM
DThere is no dominant mode
Answer is hidden
Question 35 of 80Wave-guides and antenna

An antenna functions primarily as a:

APure resistor
BTransducer converting guided electromagnetic energy to free-space radiation, and vice versa
CDigital logic device
DFrequency multiplier only
Answer is hidden
Question 36 of 80Wave-guides and antenna

The reciprocity theorem in antenna theory states that:

ATransmitting and receiving properties of an antenna are entirely different
BTransmitting and receiving properties (pattern, gain, impedance) are identical
CAn antenna cannot both transmit and receive
DGain is always greater than directivity
Answer is hidden
Question 37 of 80Wave-guides and antenna

Antenna gain differs from directivity in that gain:

AIgnores antenna losses entirely
BAccounts for antenna efficiency (gain = efficiency × directivity)
CIs always greater than directivity
DHas no relation to directivity at all
Answer is hidden
Question 38 of 80Wave-guides and antenna

Antenna beamwidth is typically measured at which points of the radiation pattern's main lobe?

AThe nulls
BThe half-power (3 dB) points
CThe side lobes
DThe antenna terminals
Answer is hidden
Question 39 of 80Wave-guides and antenna

Antenna polarization refers to:

AThe antenna's physical size
BThe orientation of the electric field vector of the radiated wave
CThe antenna's operating frequency only
DThe waveguide's cutoff frequency
Answer is hidden
Question 40 of 80Wave-guides and antenna

Waveguides are used mainly at microwave frequencies because at these frequencies:

ACoaxial cable losses become excessive
BWire cables become cheaper
CNo other transmission medium works at all
DAntennas cannot be used
Answer is hidden
Question 41 of 80Antenna's classification

An isotropic antenna is best described as:

AA physically realizable, highly directional antenna
BA hypothetical, idealized antenna radiating equally in all directions
CA type of parabolic reflector
DA waveguide mode
Answer is hidden
Question 42 of 80Antenna's classification

An omnidirectional antenna, such as a simple dipole, radiates:

AEqually in all three-dimensional directions
BUniformly in one plane, but not uniformly perpendicular to it
COnly in a single narrow beam
DNowhere; it does not radiate
Answer is hidden
Question 43 of 80Antenna's classification

Traveling wave antennas, such as the Rhombus antenna, are characterized by being:

AResonant and narrowband
BNon-resonant, terminated structures supporting a wide bandwidth
CUnable to be terminated
DUsed only at optical frequencies
Answer is hidden
Question 44 of 80Antenna's classification

A parabolic reflector antenna is valued primarily for its:

ALow gain and simple construction only
BVery high gain, by focusing rays to/from a single feed point
CInability to be used at microwave frequencies
DOmnidirectional radiation pattern
Answer is hidden
Question 45 of 80Antenna's classification

A corner reflector antenna uses:

AA single flat sheet only
BTwo flat sheets meeting at an angle to focus radiation
CA parabolic dish
DA helical conductor
Answer is hidden
Question 46 of 80Antenna's classification

A horn antenna functions primarily as a(n):

APurely resonant dipole
BFlared waveguide section matching impedance from the guide to free space
CClosed conducting loop
DDigital signal processor
Answer is hidden
Question 47 of 80Antenna's classification

A Yagi-Uda antenna achieves high gain using:

AA single isolated element only
BA driven element plus parasitic reflector and director elements
CA parabolic dish
DA microstrip patch only
Answer is hidden
Question 48 of 80Antenna's classification

A log-periodic antenna is notable for offering:

AVery narrow bandwidth only
BWide bandwidth with frequency-independent performance
CNo directivity at all
DOnly vertical polarization
Answer is hidden
Question 49 of 80Antenna's classification

A helical antenna is commonly used to produce:

ALinear polarization only
BCircular polarization, useful for satellite communication
CNo radiation at all
DOnly reception, never transmission
Answer is hidden
Question 50 of 80Antenna's classification

A microstrip (patch) antenna is characterized by:

ABeing extremely bulky and heavy
BA low-profile, flat conductive patch on a dielectric substrate, easily integrated onto PCBs
CRequiring a parabolic dish structure
DOperating only underwater
Answer is hidden
Question 51 of 80Propagation and radio frequency spectrum

Ground (surface) wave propagation is dominant at which frequency range?

ALow/medium frequencies (e.g. AM broadcast)
BOptical frequencies only
CExtremely high frequencies (EHF) only
DIt is never used in practice
Answer is hidden
Question 52 of 80Propagation and radio frequency spectrum

Space wave propagation consists of:

AOnly a ground wave
BA direct (line-of-sight) wave combined with a ground-reflected wave
COnly an ionospheric wave
DA wave that never reaches the receiver
Answer is hidden
Question 53 of 80Propagation and radio frequency spectrum

Ionospheric (sky) wave propagation enables long-distance communication by:

ATraveling in a perfectly straight line only
BBeing refracted back to Earth by ionized layers of the ionosphere
CBeing absorbed completely by the atmosphere
DBouncing off the Moon
Answer is hidden
Question 54 of 80Propagation and radio frequency spectrum

Duct propagation (tropospheric ducting) allows a wave to:

ABe completely absorbed by the atmosphere
BTravel well beyond normal line-of-sight range, trapped within an atmospheric layer
CNever leave the transmitting antenna
DPropagate only underground
Answer is hidden
Question 55 of 80Propagation and radio frequency spectrum

Tropospheric scatter propagation relies on:

AReflection from the ionosphere
BScattering by irregularities/turbulence in the troposphere
CGround-wave attenuation only
DDirect line-of-sight only, with no scattering
Answer is hidden
Question 56 of 80Propagation and radio frequency spectrum

The critical frequency of an ionospheric layer is defined as:

AThe lowest frequency that can ever propagate
BThe highest frequency at which a vertically incident wave is reflected back by that layer
CThe frequency of visible light
DA frequency unrelated to the ionosphere
Answer is hidden
Question 57 of 80Propagation and radio frequency spectrum

Above the critical frequency, a vertically incident wave will:

AAlways be reflected back to Earth
BPenetrate through the ionospheric layer into space
CBe completely absorbed at the surface
DTravel only via ground wave
Answer is hidden
Question 58 of 80Propagation and radio frequency spectrum

Free space propagation is an idealized model that assumes:

ASignificant reflections and obstructions
BNo obstructions, reflections, or atmospheric effects, with power following the inverse-square law
CA ground-reflected wave dominates entirely
DSignal power increases with distance
Answer is hidden
Question 59 of 80Propagation and radio frequency spectrum

Plane earth propagation modeling accounts for:

AOnly the direct wave, ignoring the ground
BInterference between the direct wave and a ground-reflected wave
COnly ionospheric refraction
DNo wave propagation at all
Answer is hidden
Question 60 of 80Propagation and radio frequency spectrum

The ionosphere's critical frequency varies primarily with:

AOnly the receiver's antenna gain
BTime of day, season, and solar activity
CThe transmitter's physical location on the ground only
DThe transmission line impedance
Answer is hidden
Question 61 of 80Computer Graphics & AI

The activation function used in a Hopfield Network is:

ASigmoid
BReLU
CTanh
DSign (Signum)
Answer is hidden
Question 62 of 80Computer Graphics & AI

Machine learning using labelled training data (input-output pairs) is called:

ASupervised learning
BUnsupervised learning
CReinforcement learning
DSemi-supervised learning
Answer is hidden
Question 63 of 80Computer Graphics & AI

In an AI agent, which component carries out actions on the environment?

ASensors
BKnowledge base
CActuators
DInference engine
Answer is hidden
Question 64 of 80Computer Graphics & AI

Which UML diagram describes the vocabulary (classes and relationships) of a system?

ASequence Diagram
BClass Diagram
CUse Case Diagram
DActivity Diagram
Answer is hidden
Question 65 of 80Computer Graphics & AI

To translate a circle to a new position in 2D graphics, what must be translated?

AThe centre point only
BEvery pixel on the circumference
CThe bounding box
DThe radius
Answer is hidden
Question 66 of 80Computer Graphics & AI

In 2D scaling, if both scale factors sx < 1 and sy < 1, the object:

AGrows larger
BShrinks (becomes smaller)
CReflects about the origin
DStays the same size
Answer is hidden
Question 67 of 80Computer Graphics & AI

How many distinct reflection planes exist in 3D space?

A3
B4
C6
D2
Answer is hidden
Question 68 of 80Computer Graphics & AI

The complexity of an Artificial Neural Network primarily depends on:

ANumber of input nodes only
BTraining data size only
CNumber of hidden layers only
DAll of the above (architecture, data, training)
Answer is hidden
Question 69 of 80Computer Graphics & AI

A crossword-puzzle solving environment is best described as:

APartially observable, multi-agent, stochastic
BFully observable, single-agent, deterministic
CPartially observable, single-agent, stochastic
DFully observable, multi-agent, deterministic
Answer is hidden
Question 70 of 80Computer Graphics & AI

In an expert system, the component that stores all facts, rules, and domain knowledge is the:

AKnowledge Base
BInference Engine
CWorking Memory
DUser Interface
Answer is hidden
Question 71 of 80Computer Graphics & AI

MYCIN, the medical expert system, used how many rules and which reasoning strategy?

A500 rules, Backward chaining
B500 rules, Forward chaining
C200 rules, Backward chaining
D1000 rules, Forward chaining
Answer is hidden
Question 72 of 80Computer Graphics & AI

Which concept is central to Fuzzy Logic?

ABoolean truth values
BProbability distributions
CCrisp set membership
DMembership Function (degree of truth 0–1)
Answer is hidden
Question 73 of 80Computer Graphics & AI

The A* search algorithm is NOT admissible when:

AThe heuristic overestimates the true cost to goal
BThe heuristic underestimates the true cost
CThe heuristic equals zero
DThe search space is finite
Answer is hidden
Question 74 of 80Computer Graphics & AI

Greedy Best-First Search selects the next node to expand based on:

Ag(n) only (cost from start)
Bg(n) + h(n)
Ch(n) only (estimated cost to goal)
DBreadth from root
Answer is hidden
Question 75 of 80Computer Graphics & AI

The key components of a search problem in AI are:

AInitial state, goal state, and operators (transition function)
BStart node, heuristic function, and path cost only
CDatabase, inference engine, and user interface
DAgent, environment, and reward function
Answer is hidden
Question 76 of 80Computer Graphics & AI

The transformation matrix [[1,0,0],[0,5,0],[0,0,2]] represents:

ATranslation
BScaling
CRotation
DShearing
Answer is hidden
Question 77 of 80Computer Graphics & AI

DDA stands for:

ADirect Drawing Algorithm
BDigital Differential Analyzer
CDynamic Display Adapter
DDiscrete Drawing Approach
Answer is hidden
Question 78 of 80Computer Graphics & AI

The OOAD methodology that features macro and micro development processes is:

ABooch Method
BRumbaugh OMT
CJacobson OOSE
DRUP
Answer is hidden
Question 79 of 80Computer Graphics & AI

The NLP processing pipeline in correct order is:

ATokenization → POS Tagging → Parsing → Semantic Analysis
BParsing → Tokenization → Semantic Analysis → POS Tagging
CSemantic Analysis → Tokenization → POS Tagging → Parsing
DPOS Tagging → Tokenization → Parsing → Semantic Analysis
Answer is hidden
Question 80 of 80Computer Graphics & AI

The Turing Test extension that requires a robot to interact physically with the world is:

AChinese Room Test
BTotal Turing Test
CWinograd Schema Test
DCAPTCHA
Answer is hidden
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