Electromagnetic Field Theory Question & Answers September 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 Hint 2). When the electric field interacts with the magnetic field that is known as _____________ field Electric Magnetic Electromagnetic None of the above Hint 3). ____________ is also known as magnetostatics Static magnetic field Static electric field Electric statics None of the above Hint 4). The circuit theory deals with _______________ Current Voltage Both a and b None of the above Hint 5). The field theory deals with _______________ field Electric field Magnetic field Both a and b None of the above Hint 6). 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 Hint 7). The radiation effects are neglected in ______________ theory Circuit theory Field theory Both a and b None of the above Hint 8). What is the unit of conductivity? Siemen/meter Farad Radian/second Coulomb/meter^3 Hint 9). Which one of the following is only useful in low frequency? Circuit theory Field theory Both a and b None of the above Hint 10). The cartesian coordinate system is a _____________ system Left hand Right hand Both a and b None of the above Hint 11). In rectangular coordinate system the coordinates are _____________ X-axis Y-axis Z-axis All of the above Hint 12). The vectors are represented by ______________ Magnitude Direction Both a and b None of the above Hint 13). The magnitude of a vector is always _____________ Positive Negative Either positive or negative None of the above Hint 14). ______________ product is also known as a scalar product Dot Cross Both a and b None of the above Hint 15). The Cartesian coordinate system is also known as ______________ coordinate system Rectangular Square Triangular None of the above Hint 16). The strengths of the electric field measured in ______________ Ampere/meter Volt/meter Henry None of the above Hint 17). The fields are categorized into ____________ types One Two Three Four Hint 18). The strengths of the magnetic field measured in ______________ Ampere/meter Volt/meter Henry None of the above Hint 19). Which one of the following is produced by the current? Electric field Magnetic field Both a and b None of the above Hint 20). What is the unit of magnetic vector potential? Wb/m A/m^2 W/m^2 None of the above Hint 21). The lens and parabolic antennas are used at ___________ frequency High Low Both a and b Microwave Hint 22). Which one of the following is measured using a magnetometer? Electric field Magnetic field Both a and b None of the above Hint 23). Which one of the following is proportional to an electric charge? Electric field Magnetic field Both a and b None of the above Hint 24). The angle dependence is present in _____________ field Electric field Magnetic field Electromagnetic None of the above Hint 25). Which one of the following fields obeys the principle of superposition? Electric field Magnetic field Both a and b None of the above Hint Electromagnetic Field Theory Important MCQs 26). Which one of the following fields obeys inverse square law? Electric field Magnetic field Both a and b None of the above Hint 27). The isolated poles do not exist in __________ field Electric field Magnetic field Both a and b None of the above Hint 28). In the gravitational field, the force is applied to a ____________ Mass Charge Both a and b None of the above Hint 29). 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 Hint 30). 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 Hint 31). The ratio of force by unit charge is known as _______________ intensity Electric field Magnetic field Electrostatics None of the above Hint 32). What is the unit of permittivity? F/M A/M V/M None of the above Hint 33). Which one of the following charges is in steady motion? Magnetostatics charges Electromagnetic charges Both a and b None of the above Hint 34). The force in an electric field is proportional to ______________ Speed Electric charge Magnetic field None of the above Hint 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 Hint 36). What is the unit of admittance? Siemen Farad Radian/second Joule Hint 37). Which one of the following can be analyzed in circuit theory? Transmitter Receiver Both a and b None of the above Hint 38). Which one of the following is denoted by a symbol ꙍ? Conductivity Admittance Angular frequency Hint 39). Which one of the following is not a vector type? Free charge Electric flux density Electric field intensity None of the above Hint 40). ________________ are the different kinds of coordinate systems Cartesian Cylindrical Spherical All of the above Hint 41). What is the unit of the velocity of free charge? m/s A/m^2 W/m^2 None of the above Hint 42). What is the unit of the Poynting vector? m/s A/m^2 W/m^-2 None of the above Hint 43). Which one of the following is perpendicular to the magnetic field? Electric field Electromagnetic field Both a and b None of the above Hint 44). Which one of the following is represented by a letter D? Magnetic field intensity Magnetic flux density Electric field density Electric flux density Hint 45). What is the unit of angular frequency? Siemen Farad Radian/second Joule Hint 46). Which one of the following is denoted by a symbol Y? Conductivity Admittance Angular frequency Hint 47). What is the unit of electric potential? m/s A/m^2 W/m^2 Volts Hint 48). __________ is a multi-band high frequency receiving antenna Folded dipole Log-dipole Both a and b None of the above Hint 49). _________ are the coordinates of the spherical coordinate system x, y, z r, ф, θ r, ф None of the above Hint 50). What is the unit of electrical conductivity? Sm^-1 Ωm^-1 m^-1 None of the above Hint Electromagnetic Field Theory MCQs for Quiz 51). What is the unit of the velocity of free charge? m/s A/m^2 W/m^2 None of the above Hint 52). Which one of the following is a Lorentz force equation? F=qE+qv*B F=qE*B F=qE+qv None of the above Hint 53). Which one of the following is represented by a letter E? Magnetic field intensity Magnetic flux density Electric field intensity Electric flux density Hint 54). What is the unit of angular frequency? Siemen Farad Radian/second Joule Hint 55). Which one of the following is denoted by a symbol ρ? Conductivity Admittance Angular frequency Charge density Hint 56). Which one of the following is not a scalar type? Free charge Electric potential Electric current Poynting vector Hint 57). What is the unit of volume current density? m/s A/m^2 W/m^2 None of the above Hint 58). What is the unit of Reluctance? Siemen Henry^-1 Radian/second Coulomb/meter^3 Hint 59). Which one of the following is denoted by a symbol G? Conductivity Admittance Angular frequency Conductivity Hint 60). What is the unit of electric field intensity? A/m^2 W/m^-2 Volt per meter m/s Hint Read more about Electric Field Intensity 61). In the cylindrical coordinate system the coordinates are represented by __________ x, y, z r, θ, z r, ф, z None of the above Hint 62). ____________ are the examples of vector quantity Force Acceleration Displacement All of the above Hint 63). ____________ are the examples of scalar quantity Density Mass Energy All of the above Hint 64). Which one of the following quantities has no direction? Scalar Vector Both a and b None of the above Hint 65). What is the unit of permittivity? Siemen Farad/meter Radian/second Coulomb/meter^3 Hint 66). Which one of the following is denoted by a symbol Z? Impedance Admittance Angular frequency Conductivity Hint 67). The movement in the electric field is perpendicular to the ___________ field Electric Magnetic Electrostatics None of the above Hint 68). The distance is ______________ than magnitude of displacement Greater than Less than Equal to Greater than or equal to Hint Read more about Displacement 69). The movement in the magnetic field is perpendicular to the ___________ field Electric Magnetic Electrostatics None of the above Hint 70). Which one of the following is not easily shielded? Electric field Magnetic field Both a and b None of the above Hint 71). What is the unit of charge density? Siemen Farad Radian/second Coulomb/meter^3 Hint 72). Which one of the following is denoted by a symbol µ? Permeability Admittance Angular frequency Conductivity Hint 73). The displacement is ______________ than magnitude of distance Greater than Less than Equal to less than or equal to Hint 74). Which one of the following is a scalar quantity? Distance Displacement Both a and b None of the above Hint 75). What is the unit of distance and displacement? Meter Henry Ampere None of the above Hint Electromagnetic Field Theory MCQs for Exams 76). The distance measured is always __________ Positive Negative Both a and b None of the above Hint 77). The displacement is __________ depending on the reference point Positive Negative Positive or negative None of the above Hint 78). The scalar quantity is always _____________ dimensional One Two Three Multi Hint 79). The vector quantity is always _____________ dimensional One Two Three One, two, or three Hint 80). What is the unit of Planck’s constant? Henry/meter Joule-sec Atoms/mole None of the above Hint 81). What is the unit of Avogadro’s number? Henry/meter Joule-sec Atoms/mole None of the above Hint 82). What are the applications of electrostatics? Charged coupled device cameras Electro painting Air cleaners All of the above Hint 83). ______________ are the applications of magnetism Compasses Magnetic resonance imaging Maglev trains All of the above Hint 84). Which one of the following antenna is a wideband antenna? Hertz Folded dipole Marconi None of the above Hint 85). Which one of the following is denoted by a symbol Ɛ? Permeability Admittance Angular frequency Permittivity Hint 86). What is the unit of magneto-motive force? Siemen Farad Radian/second Ampere-turn Hint 87). Which one of the following is a vector quantity? Distance Displacement Both a and b None of the above Hint 88). The loop antenna radiation pattern is ____________ Square Triangular Limacon or cardioid None of the above Hint 89). The satellite communication frequency range is between _______________ 30-300 MHz 300-3000 MHz 100-300 MHz 3000-30000 MHz Hint 90). What is the unit of conductance? Siemen Farad Radian/second Coulomb/meter^3 Hint 91). Which one of the following is represented by a letter H? Magnetic field intensity Magnetic flux density Electric field density None of the above Hint 92). Which one of the following charges is in time-varying motion? Magnetostatics charges Electromagnetic charges Both a and b None of the above Hint 93). Which one of the following is measured using an electrometer? Electric field Magnetic field Both a and b None of the above Hint 94). Which one of the following is perpendicular to an electric field? Electric field Electromagnetic field Magnetic field None of the above Hint 95). What is the unit of permeability? Siemen Henry/meter Radian/second Ampere-turn Hint 96). ______________ product is also known as the vector product Dot Cross Both a and b None of the above Hint 97). Which one of the following is independent of frequency? Circuit theory Field theory Both a and b None of the above Hint 98). 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 Hint 99). ____________ is also known as electric statics Static magnetic field Static electric field Electric statics None of the above Hint 100). The time-varying magnetic field produces _____________ field Electric Magnetic Electro-magnetic None of the above Hint Time is Up! Time's up

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