Magnetic Circuit Question & AnswersJanuary 31, 2023 By Wat Electrical This article lists 100 Magnetic Circuit MCQs for engineering students. All the Magnetic Circuit Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of the Magnetic Circuit.A circuit is a term that defines a collection of components be it electrical/non-electrical components connected together to form a closed loop. These circuits can be electrical or magnetic-type circuits. A circuit in which a magnetic-type flux is present with one or multiple loops is a magnetic-type circuit. This flux in the magnetic-type circuit is produced due to the presence of ferromagnetic substances.The primary applications of magnetic-type of circuits include transformers, magnetic recordings, generators, magnetic switches, etc. The advantages of magnetic-type switches include a high life span, enhanced performance, and operates in AC and DC.The disadvantages of magnetic-type switches include other magnets used, the operation depending on the magnetic field, and the occurrence of arcing. The application of magnetic switches includes detection and sensor. 1). How many loops does a magnetic type circuit comprises of? 1 2 3 All the above None Hint2). Which of the following parameter does a magnetic circuit comprises of? Magnetic flux Electric flux Load flux All the above None Hint3). Which of the following are responsible for generation of flux in a circuit? Permanent magnets Electromagnets Magnetic cores All the above None Hint4). Which of the following are examples of ferro magnetic materials? Cobalt Ferrous Nitrogen All the above None Hint5). Which of the following are the applications of magnetic circuits? Transformers Relays Generators All the above None Hint6). Which of the following parameters defines a unsaturated magnetic type circuit? Magnetic flux Magneto-motive force Magnetic reluctance All the above None HintRead more about DC Generator 7). Which of the following are the reasons for magnetic flux? Permanent magnet Electromagnet Non-magnet Both a and b None Hint8). ___ is the term that defines the magnetic type pressure that leads to generation of magnetic type flux in a circuit is? Magnetomotive force Electromotive force Electromagneto motive force All the above None HintRead more about Magnetic Reluctance Motor9). Which of the following are the SI units of MMF? Amperes Columbs Farads Henrys None Hint10). MMF is ___ with respect to EMF in a electric type circuit? Analogous Digitalized Both a and b Magnetized None Hint11). ____ parameter in an magnetic circuit depends on magneto motive force? Vector Magnitude Scalar Both b and c None Hint12). ____ is the term that defines the opposition to magnetic flux flow? Resistance Reluctance Reactance Both b and c None Hint13). Which of the following is the reciprocal of reluctance? Permeability Conductivity Resitivity Impedance None Hint14).Which of the following substances have lower value of reluctance? Iron Steel CRGO All the above None Hint15). A magnetic pole that has single type of pole is? Mono Di Tri Multi None Hint16). Magnetism in ____ are not occurred by magnetic monopoles? Bar type magnets Electromagnets Di pole Magnets All the above None Hint17). A Maxwell based equations defines the relation between? Electric Magnetic Electromagnetic All the above None Hint18). Maxwelll based equations are ____ on zero charge and electric type density? Symmentric Asymentric Zero Constant None Hint19). Which of the following model represents magnetic type circuit? Resistance-reluctance Resistance-conductance Resistance- Impedance Reluctance-conductance None Hint20).Which of the following the units of resistance? Ohms Amperes Henrys Farads None Hint21). In a magnetic circuit the magnetic type influences _____ types on dynamic particle? Electric type charge Electric type current Magnetic type material All the above None Hint22). Which of the following parameters are changed in a magnetic field when AC current is applied? Direction Magnitude Vector All the above None Hint23). Magnetic type field is represented as? Continuous type lines of force Magnetic flux Electric flux Both a and b None Hint24). The fields of lines at the magnets poles is? Dense Crowded Spacious Both a and b None Hint25). Which of the following is the representation of uniform magnetic field? Straight lines Crowded Discontinuous lines All the above None HintMagnetic Circuit MCQ for Exams26). Magnetic field strength is also called? Magnetic intensity Magnetic field intensity Magnetic flux density Both a and b None Hint27). A relay is a ____ component? Switch Connector Diode All the above None Hint28). Which of the following are switch contacts? Make contacts Break contacts Continuous contacts All the above None Hint29). Which of the following are the components of electromagnetic relay? Yoke Armature Coil All the above None Hint30).____ is use across coil for dissipating energy via collapsing magnetic field on deactivation and DC energy application? Fly back diode Snubber resistor Diodes Both a and b None Hint31). The relation between magnetomotive force and magnetic flux is? Magnetic reluctance Magnetic resistance Magnetic capacitance Both a and b None Hint32). Which of the following is the inverse of reluctance? Permeance Resistance Impedance Both a and b None Hint33). In a motor, the armature component is also called? Magnetic keeper Iron keeper Copper Keeper All the above None Hint34). In a strong magnet, the domains are aligned in ____ direction? Uni Bi Tri Multiple None Hint35). Which of the following type of magnet substances attract strongly to a magnet? Para Fero Dia All the above None Hint36). Which of the following energy is the out of an electric motor? Electric Mechanical Chemical Hydraulic None Hint37). Which of the following are the examples of DC type source? Batteries Inverters Power grids Both a and c None Hint38). Which of the following are the reasons for classification of electric motors? Type of sources Applications Dynamic Output All the above None Hint39). Which of the following are the power sources of electric type motor? AC/DC Radial flux Single phase All the above None Hint40). Which of the following together form a magnetic circuit in a electric type motor? Rotor Stator Magnets All the above None Hint41). Which of the following are field magnets in a magnetic circuit? Electro magnets Permanent magnets Ferro magnets All the above None Hint42). Bearing in an electric motor acts as a supporter for? Stator Rotor Load Source None Hint43). Emf is the ratio of? Energy transfer/ electric circuit per unit of electric charge Energy transfer/ magnetic circuit per unit of electric charge Energy transfer/ electromagnetic circuit per unit of electric charge Both a and c None Hint44). Which of the following are components of magnetic circuit? Magnet Magnetically sensitive switch Electrically sensitive switch Both a and b None Hint45). Which of the following are types of Magnetically sensitive switch? NO NC NA Both a and b None Hint46). Which of the following is a basic type of switch? SPST DPST DPDT SPDT None Hint47). How many terminals does a SPDT switch has? 1 2 3 4 None Hint48). Which of the following are the application of magnetic switch? Detection Breakdowns Sensor Both a and c None Hint49). In which of the following zones magnetic switch is used? Liquid Direct contacts not possible Unstable environments All the above None Hint50). Which of the following parameters are considered while designing a magnetic switch? Magnetic sensitivity Environment Power requirements All the above None HintMagnetic Circuit MCQ for Students51). A contact based rating of a magnetic circuit is expressed as? Watts Meters Newtons Ohms None Hint52). Which of the following is the formula of magnetic switch contact rating? VI VR IR IVR None Hint53). Which of the following factors does not effect magnetic switches? Oil Dust Ice All the above None Hint54). Which of the following are the examples of electromagnetic switches? Reed switches Hall effect switches Triac switches All the above None Hint55). Which of the following type of magnetic switch is used in doors on vehicles? Reed switches Hall effect switches Triac switches Normal switch None Hint56). Which of the following are the units measured by reed switches? Amperes turns Volts Ohms Meters None Hint57). Which of the following is an semiconductor based switch? Reed switches Hall effect switches Triac switches Normal switch None HintRead more about Semiconductor .58). Which of the following are the applications of hall effect type switches? Elevator car Vehicles Factory automation All the above None Hint59). Which of the following are the options provided by hall effect type switches? Unipolar Omnipolar Dipolar Both a and b None Hint60). On which of the following factors does the hall effect type switches sensitivity factor depends on? Electric current Magnetic field Both a and b Zero field None Hint61). A triac type magnetic switch is also called? Transistor switches Trimster switches Tunnel switches All the above None Hint62). Which of the following are the applications of triac switches? Power controller Power switching DC voltage systems All the above None Hint63). How much voltage is required in magnetic type switch circuit? 2V 3V 4V 5V None Hint64). Which of the following are the components of magnetic switch type circuit? Battery Magnetic switches LED All the above None HintRead more about LED65). In which of the following type of magnetic switches does no magnetic field is generated? Open magnetic switches Closed magnetic switches Short magnetic switches Both b and c None Hint66). Which of the following are the advantages of magnetic type switches? High life span Enhanced performance Operates in AC and DC All the above None Hint67). Which of the following are the disadvantages of magnetic type switches? Other magnets are used Operation depends on magnetic field Occurrence of arcing All the above None Hint68). A metal detector is _______ type of circuit? Electronic Electrical Mechanical Chemical None Hint69). A metal type of detector circuit generates ___ type of field? Electric Magnetic Electromagnetic All the above None Hint70). Which of the following is the function of magnetic type sensor? Determines noise Determines magnetic type field Determines flux All the above None Hint71). Which of the following are the groups of magnetic field? Determines sum of magnetic field Determines fields vector component Determines fields scalar component Both a and b None Hint72). Which of the following are the components of magnetic sensor circuit? Magnet Chip Magnetoresistive component All the above None Hint73). Which of the following are magnetic type sensors? Low field Earth field Bias magnet All the above None Hint74). Upto which range does low field type sensors detect objects? 1uG to 10 T 2uG to 10 T 1uG to 100 T 10uG to 10 T None Hint75). Which of the following are the examples of low field type sensor? Nuclear procession Fiber optic SQUID All the above None HintMagnetic Circuit MCQ for Quiz None 76). Upto which range does earth field type sensors detect objects? 1uG to 10 G 2uG to 10 T 1uG to 100 T 10uG to 10 T None Hint77). Upto which range does bias field type sensors detect objects? upto 10 G 2uG to 10 T 1uG to 100 T 10uG to 10 T None Hint78). Which of the following are the applications of bias field type sensors? Hall devices GMR sensor Reed switches All the above None Hint79). Which of the following is minimized in a multimedia type loudspeaker designed with magnetic shield? Noise Efficiency Interference Both a and b None Hint80). Sound is measured in terms of? Decibels Meters Hertz Farads None Hint81). Permeance is also called? Magnetic capacitance Magnetic inductance Magnetic reluctance Both a and b None Hint82). In a phasor diagram the permeance is ___ component? Real Imaginary Complex Both b and c None Hint83). A H-field is also called? Magnetizing field Magnetic field intensity Magnetic field strength All the above None Hint84). Which of the following are the other names of B-field? Magnetic flux density Magnetic induction Magnetic ambiguous All the above None Hint85). Which of the following is the F(electric) formula of Lorentz equation? F electric = qE F electric = q [v*B] F(electric) = qvBsind(Teta) Both a and c None Hint86). Which of the following type of field does a hall effect measures? Magnetic Electric Electromagnetic All the above None Hint87). A law which measure V= IR is? Farads law Ohms law Lense law Newtons law None Hint88). Which of the following term is not effected in an magnetic circuit when magnetic type of flux is sent through a reluctance? Heat Power Resistance Voltage None Hint89). Magnetic type of flux is ____ type of loop? Open Closed Short Both b and c None Hint90). An alexanderson alternator is a ____ type of machine? Dynamic Static Stationary Both b and c None Hint91). An alexanderson type alternator operates similar to? AC generator DC generator ADC generator All the above None Hint92). Which of the following is the range of RF energy generated by alexanderson type alternator? 50kW 500kW 10kW 100kW None Hint93). Which of the following are reluctance type motor? Synchronous Switched reluctance Variable reluctance All the above None Hint94). Which of the following are the sub types of reluctance motor? Variable stepping Switched Synchronous All the above None Hint95). Which of the following is the disadvantage of reluctance motor? Greater ripple torque Minimum noise Greater power dissipation All the above None Hint96). A synchronous type reluctance motor contains _______ type of poles? Stator Rotor Static Both a and b None Hint97). A switched type reluctance motor is _____ type of motor? Stepper Inductance Reluctance All the above None Hint98). Which of the following are the applications of reluctance type of motor? Analog electric meters Analog electric clock Hard disk drive motor All the above None Hint99). A magnetic type susceptibility is ____ type constant? Dimensionless Dimension Scalar Both a and b None Hint100). Which of the following are anti-ferro magnetic type materials? Chromium Iron manganese Nickel oxide All the above None Hint Time's up
