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 None Hint2). When the electric field interacts with the magnetic field that is known as _____________ field Electric Magnetic Electromagnetic None of the above None Hint3). ____________ is also known as magnetostatics Static magnetic field Static electric field Electric statics None of the above None Hint4). The circuit theory deals with _______________ Current Voltage Both a and b None of the above None Hint5). The field theory deals with _______________ field Electric field Magnetic field Both a and b None of the above None Hint6). 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 None Hint7). The radiation effects are neglected in ______________ theory Circuit theory Field theory Both a and b None of the above None Hint8). What is the unit of conductivity? Siemen/meter Farad Radian/second Coulomb/meter^3 None Hint9). Which one of the following is only useful in low frequency? Circuit theory Field theory Both a and b None of the above None Hint10). The cartesian coordinate system is a _____________ system Left hand Right hand Both a and b None of the above None Hint11). In rectangular coordinate system the coordinates are _____________ X-axis Y-axis Z-axis All of the above None Hint12). The vectors are represented by ______________ Magnitude Direction Both a and b None of the above None Hint13). The magnitude of a vector is always _____________ Positive Negative Either positive or negative None of the above None Hint14). ______________ product is also known as a scalar product Dot Cross Both a and b None of the above None Hint15). The Cartesian coordinate system is also known as ______________ coordinate system Rectangular Square Triangular None of the above None Hint16). The strengths of the electric field measured in ______________ Ampere/meter Volt/meter Henry None of the above None Hint17). The fields are categorized into ____________ types One Two Three Four None Hint18). The strengths of the magnetic field measured in ______________ Ampere/meter Volt/meter Henry None of the above None Hint19). Which one of the following is produced by the current? Electric field Magnetic field Both a and b None of the above None Hint20). What is the unit of magnetic vector potential? Wb/m A/m^2 W/m^2 None of the above None Hint21). The lens and parabolic antennas are used at ___________ frequency High Low Both a and b Microwave None Hint22). Which one of the following is measured using a magnetometer? Electric field Magnetic field Both a and b None of the above None Hint23). Which one of the following is proportional to an electric charge? Electric field Magnetic field Both a and b None of the above None Hint24). The angle dependence is present in _____________ field Electric field Magnetic field Electromagnetic None of the above None Hint25). Which one of the following fields obeys the principle of superposition? Electric field Magnetic field Both a and b None of the above None HintElectromagnetic 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 None Hint27). The isolated poles do not exist in __________ field Electric field Magnetic field Both a and b None of the above None Hint28). In the gravitational field, the force is applied to a ____________ Mass Charge Both a and b None of the above None Hint29). 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 None Hint30). 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 None Hint31). The ratio of force by unit charge is known as _______________ intensity Electric field Magnetic field Electrostatics None of the above None Hint32). What is the unit of permittivity? F/M A/M V/M None of the above None Hint33). Which one of the following charges is in steady motion? Magnetostatics charges Electromagnetic charges Both a and b None of the above None Hint34). The force in an electric field is proportional to ______________ Speed Electric charge Magnetic field None of the above None Hint35). Which one of the following is represented by a letter B? Magnetic field intensity Magnetic flux density Electric field density None of the above None Hint36). What is the unit of admittance? Siemen Farad Radian/second Joule None Hint37). Which one of the following can be analyzed in circuit theory? Transmitter Receiver Both a and b None of the above None Hint38). Which one of the following is denoted by a symbol ꙍ? Conductivity Admittance Angular frequency None Hint39). Which one of the following is not a vector type? Free charge Electric flux density Electric field intensity None of the above None Hint40). ________________ are the different kinds of coordinate systems Cartesian Cylindrical Spherical All of the above None Hint41). What is the unit of the velocity of free charge? m/s A/m^2 W/m^2 None of the above None Hint42). What is the unit of the Poynting vector? m/s A/m^2 W/m^-2 None of the above None Hint43). Which one of the following is perpendicular to the magnetic field? Electric field Electromagnetic field Both a and b None of the above None Hint44). Which one of the following is represented by a letter D? Magnetic field intensity Magnetic flux density Electric field density Electric flux density None Hint45). What is the unit of angular frequency? Siemen Farad Radian/second Joule None Hint46). Which one of the following is denoted by a symbol Y? Conductivity Admittance Angular frequency None Hint47). What is the unit of electric potential? m/s A/m^2 W/m^2 Volts None Hint48). __________ is a multi-band high frequency receiving antenna Folded dipole Log-dipole Both a and b None of the above None Hint49). _________ are the coordinates of the spherical coordinate system x, y, z r, ф, θ r, ф None of the above None Hint50). What is the unit of electrical conductivity? Sm^-1 Ωm^-1 m^-1 None of the above None HintElectromagnetic 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 None Hint52). Which one of the following is a Lorentz force equation? F=qE+qv*B F=qE*B F=qE+qv None of the above None Hint53). Which one of the following is represented by a letter E? Magnetic field intensity Magnetic flux density Electric field intensity Electric flux density None Hint54). What is the unit of angular frequency? Siemen Farad Radian/second Joule None Hint55). Which one of the following is denoted by a symbol ρ? Conductivity Admittance Angular frequency Charge density None Hint56). Which one of the following is not a scalar type? Free charge Electric potential Electric current Poynting vector None Hint57). What is the unit of volume current density? m/s A/m^2 W/m^2 None of the above None Hint58). What is the unit of Reluctance? Siemen Henry^-1 Radian/second Coulomb/meter^3 None Hint59). Which one of the following is denoted by a symbol G? Conductivity Admittance Angular frequency Conductivity None Hint60). What is the unit of electric field intensity? A/m^2 W/m^-2 Volt per meter m/s None HintRead 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 None Hint62). ____________ are the examples of vector quantity Force Acceleration Displacement All of the above None Hint63). ____________ are the examples of scalar quantity Density Mass Energy All of the above None Hint64). Which one of the following quantities has no direction? Scalar Vector Both a and b None of the above None Hint65). What is the unit of permittivity? Siemen Farad/meter Radian/second Coulomb/meter^3 None Hint66). Which one of the following is denoted by a symbol Z? Impedance Admittance Angular frequency Conductivity None Hint67). The movement in the electric field is perpendicular to the ___________ field Electric Magnetic Electrostatics None of the above None Hint68). The distance is ______________ than magnitude of displacement Greater than Less than Equal to Greater than or equal to None HintRead more about Displacement69). The movement in the magnetic field is perpendicular to the ___________ field Electric Magnetic Electrostatics None of the above None Hint70). Which one of the following is not easily shielded? Electric field Magnetic field Both a and b None of the above None Hint71). What is the unit of charge density? Siemen Farad Radian/second Coulomb/meter^3 None Hint72). Which one of the following is denoted by a symbol µ? Permeability Admittance Angular frequency Conductivity None Hint73). The displacement is ______________ than magnitude of distance Greater than Less than Equal to less than or equal to None Hint74). Which one of the following is a scalar quantity? Distance Displacement Both a and b None of the above None Hint75). What is the unit of distance and displacement? Meter Henry Ampere None of the above None HintElectromagnetic Field Theory MCQs for Exams76). The distance measured is always __________ Positive Negative Both a and b None of the above None Hint77). The displacement is __________ depending on the reference point Positive Negative Positive or negative None of the above None Hint78). The scalar quantity is always _____________ dimensional One Two Three Multi None Hint79). The vector quantity is always _____________ dimensional One Two Three One, two, or three None Hint80). What is the unit of Planck’s constant? Henry/meter Joule-sec Atoms/mole None of the above None Hint81). What is the unit of Avogadro’s number? Henry/meter Joule-sec Atoms/mole None of the above None Hint82). What are the applications of electrostatics? Charged coupled device cameras Electro painting Air cleaners All of the above None Hint83). ______________ are the applications of magnetism Compasses Magnetic resonance imaging Maglev trains All of the above None Hint84). Which one of the following antenna is a wideband antenna? Hertz Folded dipole Marconi None of the above None Hint85). Which one of the following is denoted by a symbol Ɛ? Permeability Admittance Angular frequency Permittivity None Hint86). What is the unit of magneto-motive force? Siemen Farad Radian/second Ampere-turn None Hint87). Which one of the following is a vector quantity? Distance Displacement Both a and b None of the above None Hint88). The loop antenna radiation pattern is ____________ Square Triangular Limacon or cardioid None of the above None Hint89). The satellite communication frequency range is between _______________ 30-300 MHz 300-3000 MHz 100-300 MHz 3000-30000 MHz None Hint90). What is the unit of conductance? Siemen Farad Radian/second Coulomb/meter^3 None Hint91). Which one of the following is represented by a letter H? Magnetic field intensity Magnetic flux density Electric field density None of the above None Hint92). Which one of the following charges is in time-varying motion? Magnetostatics charges Electromagnetic charges Both a and b None of the above None Hint93). Which one of the following is measured using an electrometer? Electric field Magnetic field Both a and b None of the above None Hint94). Which one of the following is perpendicular to an electric field? Electric field Electromagnetic field Magnetic field None of the above None Hint95). What is the unit of permeability? Siemen Henry/meter Radian/second Ampere-turn None Hint96). ______________ product is also known as the vector product Dot Cross Both a and b None of the above None Hint97). Which one of the following is independent of frequency? Circuit theory Field theory Both a and b None of the above None Hint98). 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 None Hint99). ____________ is also known as electric statics Static magnetic field Static electric field Electric statics None of the above None Hint100). The time-varying magnetic field produces _____________ field Electric Magnetic Electro-magnetic None of the above None Hint Time's up
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