Electric Flux Question & Answers April 24, 2023 By Wat Electrical This article lists 75 Electric Flux MCQs for engineering students. All the Electric FluxQuestions & Answers below include a hint and a link to the relevant topic wherever possible. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of the Electric Flux. Electric flux is a measure of the strength of an electric field passing through a given area or surface. It is a scalar quantity that describes the flow of electric field lines through a surface. Electric flux is defined as the dot product of the electric field vector and the surface area vector. The electric flux through a surface, electric flux through a closed surface and electric flux density are the types of electric flux. The electric flux through a surface is the amount of electric field passing through a given surface area. The electric flux through a closed surface is the net amount of electric field passing through a closed surface. The electric flux density is the amount of electric flux per unit area. Electric flux is an important concept in electromagnetism and is used to describe a wide range of phenomena, such as the behavior of electric fields in materials, the behavior of charges in electric fields, and the interaction of electric fields with conductors and dielectrics. 1). The amount of electric field passing through a given surface area is known as _______________? Electric flux through a surface Electric flux through a closed surface Electric flux density None of the above Hint 2). The ________________ is the area of the closed surface through which the electric field is passing? Electric field strength Surface area Electric permittivity None of the above Hint 3). Which one of the following deals with the study of electric charges at rest? Electrostatics Electromagnetism Electric density Electrical field Hint 4). Which of the following materials has the highest electrical conductivity? Copper Aluminum Silver Gold Hint 5). What is the main advantage of using a superconductor in an electrical circuit? Lower cost Higher resistance Zero resistance Greater durability Hint 6). Which of the following materials is a good conductor of both electricity and heat? Rubber Wood Glass Aluminium Hint 7). Two point charges of equal magnitude and opposite signs are separated by a distance of 1 meter. The electric field strength at a point midway between the charges is ______________? Zero Half the electric field strength at a point near one of the charges Equal to the electric field strength at a point near one of the charges Twice the electric field strength at a point near one of the charges Hint 8). The electric field strength at a point due to a point charge Q is given by _______________? E = kQ/d^2 E = kQ/d E = Q/d^2 E = Q/d Hint 9). The electric field strength due to an infinite charged plane is _______________? Independent of distance from the plane Proportional to the distance from the plane Inversely proportional to the distance from the plane Proportional to the square of the distance from the plane Hint 10). The net amount of electric field passing through a closed surface is known as _______________? Electric flux through a surface Electric flux through a closed surface Electric flux density None of the above Hint 11). Who first introduced the concept of electric flux? Michael Faraday James Clerk Maxwell Charles-Augustin de Coulomb Benjamin Franklin Hint 12). Which of the following statements is true about electric flux? Electric flux is a scalar quantity Electric flux is always positive Electric flux is a measure of the amount of electric field passing through a surface Electric flux is proportional to the charge enclosed by a surface Hint 13). Which of the following laws is related to electric flux? Coulomb's law Ohm's law Gauss's law Faraday's law Hint 14). Which material is most commonly used in electrical wires? Copper Aluminium Iron Gold Hint 15). The ________________ is a measure of how easily electric fields can pass through a given medium? Electric field strength Surface area Electric permittivity None of the above Hint 16). Which of the following materials is commonly used as an insulator in electrical equipment? Copper Aluminum Glass Silver Hint 17). Which of the following statements is true about electric charges? Like charges repel each other, and opposite charges attract each other Like charges attract each other, and opposite charges repel each other Only positive charges attract each other Only negative charges attract each other Hint 18). What is the electric flux through a surface that has an electric field of 5 N/C and an area of 2 m^2? 2.5 N 5 N 10 N 25 N Hint 19). What is the definition of electric flux through a closed surface? The amount of electric field passing through any part of the surface The product of the surface area and the electric field perpendicular to it The total amount of electric field passing through the surface The ratio of the electric field to the surface area Hint 20). The amount of electric flux per unit area is known as _______________? Electric flux through a surface Electric flux through a closed surface Electric flux density None of the above Hint 21). Which of the following materials is commonly used in the production of semiconductors? Copper Aluminium Silicon Silver Hint 22). Which material is commonly used as an insulator in electrical equipment? Rubber Glass Plastic Wood Hint 23). The total electric flux through a closed surface is equal to _____________________? The sum of the electric field strengths at each point on the surface The product of the electric field strength and the surface area of the closed surface The net charge enclosed by the closed surface divided by the permittivity of free space Zero Hint 24). The electric flux through a surface is increased by______________? Increasing the charge enclosed by the surface Decreasing the surface area of the surface Decreasing the electric field strength Increasing the distance between the charges and the surface Hint 25). The ability of a material to store electric charge in an electric field is known as _________________? Electric field strength Surface area Electric permittivity None of the above Hint Electric Flux MCQ for Quiz 26). What is the primary use of a superconductor material in electronics? To conduct electricity To insulate electricity To amplify electrical signals To reduce electrical noise Hint 27). What is the primary use of a semiconductor material in electronics? To conduct electricity To insulate electricity To amplify electrical signals To reduce electrical noise Hint 28). What is the electric flux through a surface that is parallel to an electric field of magnitude E? Zero E -E Cannot be determined Hint 29). What is the electric flux through a surface that is perpendicular to an electric field of magnitude E? Zero E -E Cannot be determined Hint 30). Which one of the following describes the amount of electric field passing through a given surface area? Electric flux through a surface Electric flux through a closed surface Electric flux density None of the above Hint 31). Which of the following materials is used as a superconductor at very low temperatures? Copper Aluminium Iron Niobium Hint 32). Which of the following factors affects the electric flux through a closed surface? The area of the surface The charge enclosed by the surface The orientation of the surface with respect to the electric field All of the above Hint 33). What is the electric flux through a closed surface that encloses a charge of +Q? Zero Positive Negative Cannot be determined Hint 34). If the electric field lines are parallel to the surface, the electric flux through the surface is _______________? Zero Maximum Minimum Negative Hint 35). The strength of an electric field at a given point in space is known as _________________? Electric field strength Surface area Electric permittivity None of the above Hint 36). Which of the following materials is used to make permanent magnets? Copper Aluminium Iron Silver Hint 37). What is the resistivity of pure copper? 1.68 x 10^-8 ohm-m 2.44 x 10^-8 ohm-m 3.14 x 10^-8 ohm-m 4.52 x 10^-8 ohm-m Hint 38). Which of the following materials has the highest dielectric constant? Air Glass Mica Water Hint 39). Which material is commonly used as a resistor in electronic circuits? Copper Gold Carbon Aluminium Hint 40). Which one of the following describes the net amount of electric field passing through a closed surface? Electric flux through a surface Electric flux through a closed surface Electric flux density None of the above Hint 41). Which material is commonly used as a dielectric in capacitors? Rubber Glass Plastic Ceramic Hint 42). Which material is commonly used as a superconductor at very low temperatures? Copper Aluminium Iron Yttrium barium copper oxide Hint 43) The electric field strength at a point is defined as ____________________? The electric potential at that point The force per unit charge at that point The charge per unit area at that point The work per unit charge done in moving a charge from infinity to that point Hint 44). The SI unit of electric field strength is ___________________? Newton Coulomb Newton per Coulomb Coulomb per Newton Hint 45). The area of the surface through which the electric flux is passing is known as _________________? Electric field strength Surface area Electric permittivity None of the above Hint 46). Which one of the following only applicable to static fields? Electric flux Magnetic flux Both a and b None of the above Hint 47). Which material is commonly used as a heating element in electric stoves and toasters? Copper Aluminium Iron Nichrome Hint 48). If the electric field is perpendicular to the surface, the electric flux through the surface is ______________? Zero Maximum Minimum Negative Hint 49). Which one of the following electric charges attracted to positive charges, repelled by negative charges? Positive charges Negative charges Both a and b None of the above Hint 50). Which one of the following describes the amount of electric flux per unit area? Electric flux through a surface Electric flux through a closed surface Electric flux density None of the above Hint Electric Flux MCQ for Exams 51). Which one of the following is a region in space in which a charged particle experiences a force due to the presence of other charged particles? Electrostatics Electromagnetism Electric density Electrical field Hint 52). ________________ relates the electric flux through a closed surface to the charge enclosed within that surface? Gauss's law Coulomb's law Both a and b None of the above Hint 53). Which one of the following electric charges attracted to negative charges, repelled by positive charges? Positive charges Negative charges Both a and b None of the above Hint 54). The letter ‘e’ is the symbol of _____________ electric charge? Electron Proton Neutron Positron Hint 55). The amount of electric flux passing through a unit area perpendicular to the direction of the electric field is known as _________________? Electric field strength Surface area Electric permittivity Electric flux density Hint 56). Which material is commonly used as a magnetic core in electrical transformers? Copper Aluminium Iron Gold Hint 57). Which material is commonly used as a cathode in a lead-acid battery? Copper Aluminium Lead Gold Hint 58). Which of the following is true about the Gauss's law for electric flux? It applies only to point charges It applies only to closed surfaces It relates the flux of electric field through a closed surface to the charge enclosed within the surface It is applicable only for conductors Hint 59). The electric flux through a closed surface is _________ the net charge enclosed within the surface? Proportional to Inversely proportional to Equal to Not related to Hint 60). The vector quantity is the key point of __________________? Electric flux through a surface Electric flux through a closed surface Electric flux density Both b and c Hint 61). Which one of the following describes the distribution of electric charge in a given region of space? Electrostatics Electromagnetism Electric density Electrical field Hint 62). The letter ‘e+’ is the symbol of _____________ electric charge? Electron Proton Neutron Positron Hint 63). The electric flux through a closed surface is ____________________? Always zero Always positive Always negative Can be positive, negative, or zero Hint 64). What is the unit of electric flux? V/m N/C J/C C/m² Hint 65). What is the formula for electric field strength? E = F/q E = kq/r E = V/d E = (kq/r^2) Hint 66). A point charge q is located at a distance of 0.5 meters from a test charge Q. If the electric field strength at the location of the test charge is 9 x 10^9 N/C, what is the value of q if Q = 2 x 10^-6 C? 3.6 x 10^-18 C 1.8 x 10^-9 C 9 x 10^-9 C 4.5 x 10^-18 C Hint 67). A parallel-plate capacitor has a plate separation of 0.01 meters and a potential difference of 100 volts across its plates. What is the electric field strength between the plates? 3.6 x 10^-18 C 1.8 x 10^-9 C 9 x 10^-9 C 4.5 x 10^-18 C Hint 68). The direction of electric flux is ________________? Always perpendicular to the surface Always parallel to the surface Always in the direction of the electric field Always opposite to the electric field Hint 69). Electric flux is a scalar quantity because ______________? It has both magnitude and direction It only has magnitude It only has direction It is a vector quantity Hint 70). The multiplication is the operation of an electric flux ________________? Electric flux through a surface Electric flux through a closed surface Electric flux density Both b and c Hint 71). What is the electric flux through a spherical surface due to a point charge located at the center of the sphere? Zero Maximum Minimum Cannot be determined without knowing the radius of the sphere Hint 72). Which one of the following is an example of conducting material? Brass Wood Gallium All of the above Hint 73). Which of the following materials is a semiconductor? Copper Aluminium Silicon Gold Hint 74). Which one of the following deals with the study of electric charges in motion and their interactions with magnetic fields? Electrostatics Electromagnetism Electric density Electrical field Hint 75). The ________________ is the magnitude of the electric field at a given point? Electric field strength Surface area Electric permittivity None of the above Hint For More MCQs Electric Traction Question & Answers Electrical Drive Question & Answers Electric Circuit Question & Answers Electrical Cables Question & Answers Electric Illumination Question & Answers Time's up
