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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
HintThe time-varying electric field produces a magnetic field
2). When the electric field interacts with the magnetic field that is known as _____________ field
HintWhen the electric field interacts with the magnetic field that is known as the electromagnetic field
3). ____________ is also known as magnetostatics
HintThe static magnetic field is also known as magnetostatics
4). The circuit theory deals with _______________
HintThe circuit theory deals with both current and voltage
5). The field theory deals with _______________ field
HintThe field theory deals with both electric and magnetic fields
6). The voltage and current in a circuit theory are ______________
HintThe voltage and current in a circuit theory are scalars
7). The radiation effects are neglected in ______________ theory
HintThe radiation effects are neglected in circuit theory
8). What is the unit of conductivity?
HintThe unit of conductivity is siemens/meter
9). Which one of the following is only useful in low frequency?
HintThe circuit theory is only useful in low frequency whereas field theory is independent of frequency
10). The cartesian coordinate system is a _____________ system
HintThe cartesian coordinate system is a right-hand system
11). In rectangular coordinate system the coordinates are _____________
HintIn a rectangular coordinate system the coordinates are x-axis, y-axis, and z-axis
12). The vectors are represented by ______________
HintThe vectors are represented by both magnitude and direction
13). The magnitude of a vector is always _____________
HintThe magnitude of a vector is always positive
14). ______________ product is also known as a scalar product
HintThe dot product is also known as a scalar product
15). The Cartesian coordinate system is also known as ______________ coordinate system
HintThe Cartesian coordinate system is also known as the rectangular coordinate system
16). The strengths of the electric field measured in ______________
HintThe strengths of the electric field measured in volts per meter
17). The fields are categorized into ____________ types
HintThe fields are categorized into two types they are scalar and vector
18). The strengths of the magnetic field measured in ______________
HintThe strengths of the magnetic field measured in ampere per meter
19). Which one of the following is produced by the current?
HintThe magnetic field is produced by the current
20). What is the unit of magnetic vector potential?
HintThe unit of magnetic vector potential is weber per meter
21). The lens and parabolic antennas are used at ___________ frequency
HintThe lens and parabolic antennas are used at microwave frequency
22). Which one of the following is measured using a magnetometer?
HintThe magnetic field is measured using a magnetometer
23). Which one of the following is proportional to an electric charge?
HintThe electric field is proportional to an electric charge
24). The angle dependence is present in _____________ field
HintThe angle dependence is present in the magnetic field
25). Which one of the following fields obeys the principle of superposition?
HintThe electric and magnetic fields both obey the principle of superposition

Electromagnetic Field Theory Important MCQs

26). Which one of the following fields obeys inverse square law?
HintThe electric and magnetic fields both obey inverse square law
27). The isolated poles do not exist in __________ field
HintThe isolated poles do not exist in a magnetic field
28). In the gravitational field, the force is applied to a ____________
HintIn the gravitational field, the force is applied to a mass
29). In the gravitational field, the direction of the force is ____________
HintIn the gravitational field, the direction of the force is the same as the field
30). The direction of the force in an electric field is _____________
HintThe direction of the force in an electric field is opposite or in the same direction of the field
31). The ratio of force by unit charge is known as _______________ intensity
HintThe ratio of force by unit charge is known as electric field intensity
32). What is the unit of permittivity?
HintThe unit of permittivity is farad per meter
33). Which one of the following charges is in steady motion?
HintThe magneto-statics charges are in steady motion
34). The force in an electric field is proportional to ______________
HintThe force in an electric field is proportional to electric charge
35). Which one of the following is represented by a letter B?
HintThe magnetic flux density is represented by a letter B
36). What is the unit of admittance?
HintThe unit of admittance is Siemen
37). Which one of the following can be analyzed in circuit theory?
HintThe transmitter and receiver both are analyzed in circuit theory
38). Which one of the following is denoted by a symbol ꙍ?
HintThe angular frequency is denoted by a symbol ꙍ
39). Which one of the following is not a vector type?
HintThe free charge is not a vector type
40). ________________ are the different kinds of coordinate systems
HintThe Cartesian, cylindrical, and spherical are the three kinds of coordinate systems
41). What is the unit of the velocity of free charge?
HintThe unit of the velocity of free charge is meters per second
42). What is the unit of the Poynting vector?
HintThe unit of Poynting vector is watts per square meter
43). Which one of the following is perpendicular to the magnetic field?
HintThe electric field is perpendicular to the magnetic field
44). Which one of the following is represented by a letter D?
HintThe electric flux density is represented by a letter D
45). What is the unit of angular frequency?
HintThe unit of angular frequency is radian/second
46). Which one of the following is denoted by a symbol Y?
HintThe admittance is denoted by a letter Y
47). What is the unit of electric potential?
HintThe unit of electric potential is volts
48). __________ is a multi-band high frequency receiving antenna
HintThe log-dipole is a multi-band high frequency receiving antenna
49). _________ are the coordinates of the spherical coordinate system
HintThe r, ф, θ are the coordinates of the spherical coordinate system
50). What is the unit of electrical conductivity?
HintThe unit of electrical conductivity is Sm^-1

Electromagnetic Field Theory MCQs for Quiz

51). What is the unit of the velocity of free charge?
HintThe unit of the velocity of free charge is meters per second
52). Which one of the following is a Lorentz force equation?
HintThe Lorentz force is given by F=qE+qv*B
53). Which one of the following is represented by a letter E?
HintThe electric field intensity is represented by a letter D
54). What is the unit of angular frequency?
HintThe unit of angular frequency is radian/second
55). Which one of the following is denoted by a symbol ρ?
HintThe charge density is denoted by a symbol ρ
56). Which one of the following is not a scalar type?
HintThe pointing vector is not a vector type
57). What is the unit of volume current density?
HintThe unit of volume current density is ampere per meter square
58). What is the unit of Reluctance?
HintThe unit of Reluctance is henry^-1
59). Which one of the following is denoted by a symbol G?
HintThe conductivity is denoted by a letter G
60). What is the unit of electric field intensity?
HintThe unit of electric field intensity is volt per meter
Read more about Electric Field Intensity
61). In the cylindrical coordinate system the coordinates are represented by __________
HintIn the cylindrical coordinate system, the coordinates are represented by r, θ, and z
62). ____________ are the examples of vector quantity
HintThe force, acceleration, and displacement are examples of the vector quantity
63). ____________ are the examples of scalar quantity
HintThe density, mass, and energy are examples of the scalar quantity
64). Which one of the following quantities has no direction?
HintThe scalar quantity has no direction
65). What is the unit of permittivity?
HintThe unit of permittivity is farad/meter
66). Which one of the following is denoted by a symbol Z?
HintThe impedance is denoted by a letter Z
67). The movement in the electric field is perpendicular to the ___________ field
HintThe movement in the electric field is perpendicular to the magnetic field
68). The distance is ______________ than magnitude of displacement
HintThe distance is greater than or equal to the magnitude of the displacement
Read more about Displacement
69). The movement in the magnetic field is perpendicular to the ___________ field
HintThe movement in the magnetic field is perpendicular to the electric field
70). Which one of the following is not easily shielded?
HintThe magnetic field is not easily shielded whereas the electric field is easily shielded
71). What is the unit of charge density?
HintThe unit of charge density is coulomb/meter^3
72). Which one of the following is denoted by a symbol µ?
HintThe permeability is denoted by a symbol µ
73). The displacement is ______________ than magnitude of distance
HintThe displacement is less than or equal to the magnitude of the distance
74). Which one of the following is a scalar quantity?
HintThe distance is a scalar quantity whereas displacement is a vector quantity
75). What is the unit of distance and displacement?
HintThe unit of distance and displacement is meter

Electromagnetic Field Theory MCQs for Exams

76). The distance measured is always __________
HintThe distance measured is always positive
77). The displacement is __________ depending on the reference point
HintThe displacement can be positive or negative depending on the reference point
78). The scalar quantity is always _____________ dimensional
HintThe scalar quantity is always one dimensional
79). The vector quantity is always _____________ dimensional
HintThe vector quantity can be one dimensional, two dimensional, or three dimensional
80). What is the unit of Planck’s constant?
HintThe unit of Planck’s constant is joule-sec
81). What is the unit of Avogadro’s number?
HintThe unit of Avogadro’s number is atoms per mole
82). What are the applications of electrostatics?
HintThe charged coupled device cameras, electro painting, air cleaners are few applications of electrostatics
83). ______________ are the applications of magnetism
HintThe compasses, magnetic resonance imaging, maglev trains are few applications of magnetism
84). Which one of the following antenna is a wideband antenna?
HintThe folded dipole antenna is a wideband antenna
85). Which one of the following is denoted by a symbol Ɛ?
HintThe permittivity is denoted by a symbol Ɛ
86). What is the unit of magneto-motive force?
HintThe unit of magneto-motive force is ampere-turn
87). Which one of the following is a vector quantity?
HintThe displacement is a vector quantity whereas distance is a scalar quantity
88). The loop antenna radiation pattern is ____________
HintThe loop antenna radiation pattern is Limacon or cardioid
89). The satellite communication frequency range is between _______________
HintThe satellite communication frequency range is between 3000-30000 MHz
90). What is the unit of conductance?
HintThe unit of conductance is Siemen
91). Which one of the following is represented by a letter H?
HintThe magnetic field intensity is represented by a letter H
92). Which one of the following charges is in time-varying motion?
HintThe electromagnetic charges are in time-varying motion
93). Which one of the following is measured using an electrometer?
HintThe electric field is measured using an electrometer
94). Which one of the following is perpendicular to an electric field?
HintThe magnetic field is perpendicular to an electric field
95). What is the unit of permeability?
HintThe unit of permeability is henry/meter
96). ______________ product is also known as the vector product
HintThe cross product is also known as the vector product
97). Which one of the following is independent of frequency?
HintThe field theory is independent of frequency
98). The electric and magnetic fields in a field theory are ______________
HintThe electric and magnetic fields in a field theory are vectors
99). ____________ is also known as electric statics
HintThe static electric field is also known as electric statics
100). The time-varying magnetic field produces _____________ field
HintThe time-varying magnetic field produces an electric field
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