Electromagnetic Field Theory Question & AnswersSeptember 20, 2021 By Wat Electrical Leave a Comment This article lists 100 Electromagnetic Field Theory MCQs for Engineering Students. All the Electromagnetic Field Theory Questions & Answers given below includes solution and link wherever possible to the relevant topic.The electromagnetic field is produced by the interaction of time-varying electric and magnetic fields. The field is a function that specifies a particular quantity everywhere in a region. So, whenever the electromagnetic fields are interacting with each other which is the time-varying that leads to the electromagnetic field. The theory that deals with the interaction of the electric fields and magnetic fields in a particular region are called electromagnetic field theory.1). The time-varying electric field produces _____________ field Electric Magnetic Electro-magnetic None of the above HintThe time-varying electric field produces a magnetic field2). When the electric field interacts with the magnetic field that is known as _____________ field Electric Magnetic Electromagnetic None of the above HintWhen the electric field interacts with the magnetic field that is known as the electromagnetic field3). ____________ is also known as magnetostatics Static magnetic field Static electric field Electric statics None of the above HintThe static magnetic field is also known as magnetostatics4). The circuit theory deals with _______________ Current Voltage Both a and b None of the above HintThe circuit theory deals with both current and voltage5). The field theory deals with _______________ field Electric field Magnetic field Both a and b None of the above HintThe field theory deals with both electric and magnetic fields6). The voltage and current in a circuit theory are ______________ Scalar Vector Voltage is scalar and current is a vector Voltage is vector and current is a scalar HintThe voltage and current in a circuit theory are scalars7). The radiation effects are neglected in ______________ theory Circuit theory Field theory Both a and b None of the above HintThe radiation effects are neglected in circuit theory8). What is the unit of conductivity? Siemen/meter Farad Radian/second Coulomb/meter^3 HintThe unit of conductivity is siemens/meter9). Which one of the following is only useful in low frequency? Circuit theory Field theory Both a and b None of the above HintThe circuit theory is only useful in low frequency whereas field theory is independent of frequency10). The cartesian coordinate system is a _____________ system Left hand Right hand Both a and b None of the above HintThe cartesian coordinate system is a right-hand system11). In rectangular coordinate system the coordinates are _____________ X-axis Y-axis Z-axis All of the above HintIn a rectangular coordinate system the coordinates are x-axis, y-axis, and z-axis 12). The vectors are represented by ______________ Magnitude Direction Both a and b None of the above HintThe vectors are represented by both magnitude and direction13). The magnitude of a vector is always _____________ Positive Negative Either positive or negative None of the above HintThe magnitude of a vector is always positive14). ______________ product is also known as a scalar product Dot Cross Both a and b None of the above HintThe dot product is also known as a scalar product15). The Cartesian coordinate system is also known as ______________ coordinate system Rectangular Square Triangular None of the above HintThe Cartesian coordinate system is also known as the rectangular coordinate system 16). The strengths of the electric field measured in ______________ Ampere/meter Volt/meter Henry None of the above HintThe strengths of the electric field measured in volts per meter17). The fields are categorized into ____________ types One Two Three Four HintThe fields are categorized into two types they are scalar and vector18). The strengths of the magnetic field measured in ______________ Ampere/meter Volt/meter Henry None of the above HintThe strengths of the magnetic field measured in ampere per meter19). Which one of the following is produced by the current? Electric field Magnetic field Both a and b None of the above HintThe magnetic field is produced by the current20). What is the unit of magnetic vector potential? Wb/m A/m^2 W/m^2 None of the above HintThe unit of magnetic vector potential is weber per meter21). The lens and parabolic antennas are used at ___________ frequency High Low Both a and b Microwave HintThe lens and parabolic antennas are used at microwave frequency22). Which one of the following is measured using a magnetometer? Electric field Magnetic field Both a and b None of the above HintThe magnetic field is measured using a magnetometer23). Which one of the following is proportional to an electric charge? Electric field Magnetic field Both a and b None of the above HintThe electric field is proportional to an electric charge24). The angle dependence is present in _____________ field Electric field Magnetic field Electromagnetic None of the above HintThe angle dependence is present in the magnetic field25). Which one of the following fields obeys the principle of superposition? Electric field Magnetic field Both a and b None of the above HintThe electric and magnetic fields both obey the principle of superpositionElectromagnetic Field Theory Important MCQs26). Which one of the following fields obeys inverse square law? Electric field Magnetic field Both a and b None of the above HintThe electric and magnetic fields both obey inverse square law 27). The isolated poles do not exist in __________ field Electric field Magnetic field Both a and b None of the above HintThe isolated poles do not exist in a magnetic field28). In the gravitational field, the force is applied to a ____________ Mass Charge Both a and b None of the above HintIn the gravitational field, the force is applied to a mass29). In the gravitational field, the direction of the force is ____________ Same as the field Opposite to the filed Perpendicular to the field None of the above HintIn the gravitational field, the direction of the force is the same as the field30). The direction of the force in an electric field is _____________ Same as the field Opposite to the filed Perpendicular to the field Opposite or in the same direction of the field HintThe direction of the force in an electric field is opposite or in the same direction of the field31). The ratio of force by unit charge is known as _______________ intensity Electric field Magnetic field Electrostatics None of the above HintThe ratio of force by unit charge is known as electric field intensity32). What is the unit of permittivity? F/M A/M V/M None of the above HintThe unit of permittivity is farad per meter33). Which one of the following charges is in steady motion? Magnetostatics charges Electromagnetic charges Both a and b None of the above HintThe magneto-statics charges are in steady motion34). The force in an electric field is proportional to ______________ Speed Electric charge Magnetic field None of the above HintThe force in an electric field is proportional to electric charge 35). Which one of the following is represented by a letter B? Magnetic field intensity Magnetic flux density Electric field density None of the above HintThe magnetic flux density is represented by a letter B36). What is the unit of admittance? Siemen Farad Radian/second Joule HintThe unit of admittance is Siemen37). Which one of the following can be analyzed in circuit theory? Transmitter Receiver Both a and b None of the above HintThe transmitter and receiver both are analyzed in circuit theory38). Which one of the following is denoted by a symbol ꙍ? Conductivity Admittance Angular frequency HintThe angular frequency is denoted by a symbol ꙍ39). Which one of the following is not a vector type? Free charge Electric flux density Electric field intensity None of the above HintThe free charge is not a vector type40). ________________ are the different kinds of coordinate systems Cartesian Cylindrical Spherical All of the above HintThe Cartesian, cylindrical, and spherical are the three kinds of coordinate systems41). What is the unit of the velocity of free charge? m/s A/m^2 W/m^2 None of the above HintThe unit of the velocity of free charge is meters per second42). What is the unit of the Poynting vector? m/s A/m^2 W/m^-2 None of the above HintThe unit of Poynting vector is watts per square meter43). Which one of the following is perpendicular to the magnetic field? Electric field Electromagnetic field Both a and b None of the above HintThe electric field is perpendicular to the magnetic field44). Which one of the following is represented by a letter D? Magnetic field intensity Magnetic flux density Electric field density Electric flux density HintThe electric flux density is represented by a letter D45). What is the unit of angular frequency? Siemen Farad Radian/second Joule HintThe unit of angular frequency is radian/second46). Which one of the following is denoted by a symbol Y? Conductivity Admittance Angular frequency HintThe admittance is denoted by a letter Y47). What is the unit of electric potential? m/s A/m^2 W/m^2 Volts HintThe unit of electric potential is volts48). __________ is a multi-band high frequency receiving antenna Folded dipole Log-dipole Both a and b None of the above HintThe log-dipole is a multi-band high frequency receiving antenna49). _________ are the coordinates of the spherical coordinate system x, y, z r, ф, θ r, ф None of the above HintThe r, ф, θ are the coordinates of the spherical coordinate system50). What is the unit of electrical conductivity? Sm^-1 Ωm^-1 m^-1 None of the above HintThe unit of electrical conductivity is Sm^-1Electromagnetic Field Theory MCQs for Quiz51). What is the unit of the velocity of free charge? m/s A/m^2 W/m^2 None of the above HintThe unit of the velocity of free charge is meters per second52). Which one of the following is a Lorentz force equation? F=qE+qv*B F=qE*B F=qE+qv None of the above HintThe Lorentz force is given by F=qE+qv*B53). Which one of the following is represented by a letter E? Magnetic field intensity Magnetic flux density Electric field intensity Electric flux density HintThe electric field intensity is represented by a letter D54). What is the unit of angular frequency? Siemen Farad Radian/second Joule HintThe unit of angular frequency is radian/second55). Which one of the following is denoted by a symbol ρ? Conductivity Admittance Angular frequency Charge density HintThe charge density is denoted by a symbol ρ56). Which one of the following is not a scalar type? Free charge Electric potential Electric current Poynting vector HintThe pointing vector is not a vector type57). What is the unit of volume current density? m/s A/m^2 W/m^2 None of the above HintThe unit of volume current density is ampere per meter square58). What is the unit of Reluctance? Siemen Henry^-1 Radian/second Coulomb/meter^3 HintThe unit of Reluctance is henry^-159). Which one of the following is denoted by a symbol G? Conductivity Admittance Angular frequency Conductivity HintThe conductivity is denoted by a letter G60). What is the unit of electric field intensity? A/m^2 W/m^-2 Volt per meter m/s HintThe unit of electric field intensity is volt per meter Read more about Electric Field Intensity61). In the cylindrical coordinate system the coordinates are represented by __________ x, y, z r, θ, z r, ф, z None of the above HintIn the cylindrical coordinate system, the coordinates are represented by r, θ, and z62). ____________ are the examples of vector quantity Force Acceleration Displacement All of the above HintThe force, acceleration, and displacement are examples of the vector quantity63). ____________ are the examples of scalar quantity Density Mass Energy All of the above HintThe density, mass, and energy are examples of the scalar quantity64). Which one of the following quantities has no direction? Scalar Vector Both a and b None of the above HintThe scalar quantity has no direction65). What is the unit of permittivity? Siemen Farad/meter Radian/second Coulomb/meter^3 HintThe unit of permittivity is farad/meter66). Which one of the following is denoted by a symbol Z? Impedance Admittance Angular frequency Conductivity HintThe impedance is denoted by a letter Z67). The movement in the electric field is perpendicular to the ___________ field Electric Magnetic Electrostatics None of the above HintThe movement in the electric field is perpendicular to the magnetic field68). The distance is ______________ than magnitude of displacement Greater than Less than Equal to Greater than or equal to HintThe distance is greater than or equal to the magnitude of the displacement Read more about Displacement69). The movement in the magnetic field is perpendicular to the ___________ field Electric Magnetic Electrostatics None of the above HintThe movement in the magnetic field is perpendicular to the electric field70). Which one of the following is not easily shielded? Electric field Magnetic field Both a and b None of the above HintThe magnetic field is not easily shielded whereas the electric field is easily shielded71). What is the unit of charge density? Siemen Farad Radian/second Coulomb/meter^3 HintThe unit of charge density is coulomb/meter^372). Which one of the following is denoted by a symbol µ? Permeability Admittance Angular frequency Conductivity HintThe permeability is denoted by a symbol µ73). The displacement is ______________ than magnitude of distance Greater than Less than Equal to less than or equal to HintThe displacement is less than or equal to the magnitude of the distance 74). Which one of the following is a scalar quantity? Distance Displacement Both a and b None of the above HintThe distance is a scalar quantity whereas displacement is a vector quantity75). What is the unit of distance and displacement? Meter Henry Ampere None of the above HintThe unit of distance and displacement is meterElectromagnetic Field Theory MCQs for Exams76). The distance measured is always __________ Positive Negative Both a and b None of the above HintThe distance measured is always positive77). The displacement is __________ depending on the reference point Positive Negative Positive or negative None of the above HintThe displacement can be positive or negative depending on the reference point78). The scalar quantity is always _____________ dimensional One Two Three Multi HintThe scalar quantity is always one dimensional79). The vector quantity is always _____________ dimensional One Two Three One, two, or three HintThe vector quantity can be one dimensional, two dimensional, or three dimensional80). What is the unit of Planck’s constant? Henry/meter Joule-sec Atoms/mole None of the above HintThe unit of Planck’s constant is joule-sec81). What is the unit of Avogadro’s number? Henry/meter Joule-sec Atoms/mole None of the above HintThe unit of Avogadro’s number is atoms per mole82). What are the applications of electrostatics? Charged coupled device cameras Electro painting Air cleaners All of the above HintThe charged coupled device cameras, electro painting, air cleaners are few applications of electrostatics83). ______________ are the applications of magnetism Compasses Magnetic resonance imaging Maglev trains All of the above HintThe compasses, magnetic resonance imaging, maglev trains are few applications of magnetism84). Which one of the following antenna is a wideband antenna? Hertz Folded dipole Marconi None of the above HintThe folded dipole antenna is a wideband antenna85). Which one of the following is denoted by a symbol Ɛ? Permeability Admittance Angular frequency Permittivity HintThe permittivity is denoted by a symbol Ɛ86). What is the unit of magneto-motive force? Siemen Farad Radian/second Ampere-turn HintThe unit of magneto-motive force is ampere-turn87). Which one of the following is a vector quantity? Distance Displacement Both a and b None of the above HintThe displacement is a vector quantity whereas distance is a scalar quantity88). The loop antenna radiation pattern is ____________ Square Triangular Limacon or cardioid None of the above HintThe loop antenna radiation pattern is Limacon or cardioid89). The satellite communication frequency range is between _______________ 30-300 MHz 300-3000 MHz 100-300 MHz 3000-30000 MHz HintThe satellite communication frequency range is between 3000-30000 MHz90). What is the unit of conductance? Siemen Farad Radian/second Coulomb/meter^3 HintThe unit of conductance is Siemen91). Which one of the following is represented by a letter H? Magnetic field intensity Magnetic flux density Electric field density None of the above HintThe magnetic field intensity is represented by a letter H92). Which one of the following charges is in time-varying motion? Magnetostatics charges Electromagnetic charges Both a and b None of the above HintThe electromagnetic charges are in time-varying motion93). Which one of the following is measured using an electrometer? Electric field Magnetic field Both a and b None of the above HintThe electric field is measured using an electrometer94). Which one of the following is perpendicular to an electric field? Electric field Electromagnetic field Magnetic field None of the above HintThe magnetic field is perpendicular to an electric field95). What is the unit of permeability? Siemen Henry/meter Radian/second Ampere-turn HintThe unit of permeability is henry/meter96). ______________ product is also known as the vector product Dot Cross Both a and b None of the above HintThe cross product is also known as the vector product97). Which one of the following is independent of frequency? Circuit theory Field theory Both a and b None of the above HintThe field theory is independent of frequency98). The electric and magnetic fields in a field theory are ______________ Scalar Vector Electric is scalar and magnetic is the vector Magnetic is vector and electric is scalar HintThe electric and magnetic fields in a field theory are vectors99). ____________ is also known as electric statics Static magnetic field Static electric field Electric statics None of the above HintThe static electric field is also known as electric statics100). The time-varying magnetic field produces _____________ field Electric Magnetic Electro-magnetic None of the above HintThe time-varying magnetic field produces an electric field Time is Up! Time's up

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