Magnetic Circuit Question & Answers January 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 Hint 2). Which of the following parameter does a magnetic circuit comprises of? Magnetic flux Electric flux Load flux All the above Hint 3). Which of the following are responsible for generation of flux in a circuit? Permanent magnets Electromagnets Magnetic cores All the above Hint 4). Which of the following are examples of ferro magnetic materials? Cobalt Ferrous Nitrogen All the above Hint 5). Which of the following are the applications of magnetic circuits? Transformers Relays Generators All the above Hint 6). Which of the following parameters defines a unsaturated magnetic type circuit? Magnetic flux Magneto-motive force Magnetic reluctance All the above Hint Read more about DC Generator 7). Which of the following are the reasons for magnetic flux? Permanent magnet Electromagnet Non-magnet Both a and b Hint 8). ___ 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 Hint Read more about Magnetic Reluctance Motor 9). Which of the following are the SI units of MMF? Amperes Columbs Farads Henrys Hint 10). MMF is ___ with respect to EMF in a electric type circuit? Analogous Digitalized Both a and b Magnetized Hint 11). ____ parameter in an magnetic circuit depends on magneto motive force? Vector Magnitude Scalar Both b and c Hint 12). ____ is the term that defines the opposition to magnetic flux flow? Resistance Reluctance Reactance Both b and c Hint 13). Which of the following is the reciprocal of reluctance? Permeability Conductivity Resitivity Impedance Hint 14).Which of the following substances have lower value of reluctance? Iron Steel CRGO All the above Hint 15). A magnetic pole that has single type of pole is? Mono Di Tri Multi Hint 16). Magnetism in ____ are not occurred by magnetic monopoles? Bar type magnets Electromagnets Di pole Magnets All the above Hint 17). A Maxwell based equations defines the relation between? Electric Magnetic Electromagnetic All the above Hint 18). Maxwelll based equations are ____ on zero charge and electric type density? Symmentric Asymentric Zero Constant Hint 19). Which of the following model represents magnetic type circuit? Resistance-reluctance Resistance-conductance Resistance- Impedance Reluctance-conductance Hint 20).Which of the following the units of resistance? Ohms Amperes Henrys Farads Hint 21). In a magnetic circuit the magnetic type influences _____ types on dynamic particle? Electric type charge Electric type current Magnetic type material All the above Hint 22). Which of the following parameters are changed in a magnetic field when AC current is applied? Direction Magnitude Vector All the above Hint 23). Magnetic type field is represented as? Continuous type lines of force Magnetic flux Electric flux Both a and b Hint 24). The fields of lines at the magnets poles is? Dense Crowded Spacious Both a and b Hint 25). Which of the following is the representation of uniform magnetic field? Straight lines Crowded Discontinuous lines All the above Hint Magnetic Circuit MCQ for Exams 26). Magnetic field strength is also called? Magnetic intensity Magnetic field intensity Magnetic flux density Both a and b Hint 27). A relay is a ____ component? Switch Connector Diode All the above Hint 28). Which of the following are switch contacts? Make contacts Break contacts Continuous contacts All the above Hint 29). Which of the following are the components of electromagnetic relay? Yoke Armature Coil All the above Hint 30).____ 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 Hint 31). The relation between magnetomotive force and magnetic flux is? Magnetic reluctance Magnetic resistance Magnetic capacitance Both a and b Hint 32). Which of the following is the inverse of reluctance? Permeance Resistance Impedance Both a and b Hint 33). In a motor, the armature component is also called? Magnetic keeper Iron keeper Copper Keeper All the above Hint 34). In a strong magnet, the domains are aligned in ____ direction? Uni Bi Tri Multiple Hint 35). Which of the following type of magnet substances attract strongly to a magnet? Para Fero Dia All the above Hint 36). Which of the following energy is the out of an electric motor? Electric Mechanical Chemical Hydraulic Hint 37). Which of the following are the examples of DC type source? Batteries Inverters Power grids Both a and c Hint 38). Which of the following are the reasons for classification of electric motors? Type of sources Applications Dynamic Output All the above Hint 39). Which of the following are the power sources of electric type motor? AC/DC Radial flux Single phase All the above Hint 40). Which of the following together form a magnetic circuit in a electric type motor? Rotor Stator Magnets All the above Hint 41). Which of the following are field magnets in a magnetic circuit? Electro magnets Permanent magnets Ferro magnets All the above Hint 42). Bearing in an electric motor acts as a supporter for? Stator Rotor Load Source Hint 43). 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 Hint 44). Which of the following are components of magnetic circuit? Magnet Magnetically sensitive switch Electrically sensitive switch Both a and b Hint 45). Which of the following are types of Magnetically sensitive switch? NO NC NA Both a and b Hint 46). Which of the following is a basic type of switch? SPST DPST DPDT SPDT Hint 47). How many terminals does a SPDT switch has? 1 2 3 4 Hint 48). Which of the following are the application of magnetic switch? Detection Breakdowns Sensor Both a and c Hint 49). In which of the following zones magnetic switch is used? Liquid Direct contacts not possible Unstable environments All the above Hint 50). Which of the following parameters are considered while designing a magnetic switch? Magnetic sensitivity Environment Power requirements All the above Hint Magnetic Circuit MCQ for Students 51). A contact based rating of a magnetic circuit is expressed as? Watts Meters Newtons Ohms Hint 52). Which of the following is the formula of magnetic switch contact rating? VI VR IR IVR Hint 53). Which of the following factors does not effect magnetic switches? Oil Dust Ice All the above Hint 54). Which of the following are the examples of electromagnetic switches? Reed switches Hall effect switches Triac switches All the above Hint 55). Which of the following type of magnetic switch is used in doors on vehicles? Reed switches Hall effect switches Triac switches Normal switch Hint 56). Which of the following are the units measured by reed switches? Amperes turns Volts Ohms Meters Hint 57). Which of the following is an semiconductor based switch? Reed switches Hall effect switches Triac switches Normal switch Hint Read more about Semiconductor . 58). Which of the following are the applications of hall effect type switches? Elevator car Vehicles Factory automation All the above Hint 59). Which of the following are the options provided by hall effect type switches? Unipolar Omnipolar Dipolar Both a and b Hint 60). 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 Hint 61). A triac type magnetic switch is also called? Transistor switches Trimster switches Tunnel switches All the above Hint 62). Which of the following are the applications of triac switches? Power controller Power switching DC voltage systems All the above Hint 63). How much voltage is required in magnetic type switch circuit? 2V 3V 4V 5V Hint 64). Which of the following are the components of magnetic switch type circuit? Battery Magnetic switches LED All the above Hint Read more about LED 65). 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 Hint 66). Which of the following are the advantages of magnetic type switches? High life span Enhanced performance Operates in AC and DC All the above Hint 67). 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 Hint 68). A metal detector is _______ type of circuit? Electronic Electrical Mechanical Chemical Hint 69). A metal type of detector circuit generates ___ type of field? Electric Magnetic Electromagnetic All the above Hint 70). Which of the following is the function of magnetic type sensor? Determines noise Determines magnetic type field Determines flux All the above Hint 71). 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 Hint 72). Which of the following are the components of magnetic sensor circuit? Magnet Chip Magnetoresistive component All the above Hint 73). Which of the following are magnetic type sensors? Low field Earth field Bias magnet All the above Hint 74). 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 Hint 75). Which of the following are the examples of low field type sensor? Nuclear procession Fiber optic SQUID All the above Hint Magnetic Circuit MCQ for Quiz 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 Hint 77). 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 Hint 78). Which of the following are the applications of bias field type sensors? Hall devices GMR sensor Reed switches All the above Hint 79). Which of the following is minimized in a multimedia type loudspeaker designed with magnetic shield? Noise Efficiency Interference Both a and b Hint 80). Sound is measured in terms of? Decibels Meters Hertz Farads Hint 81). Permeance is also called? Magnetic capacitance Magnetic inductance Magnetic reluctance Both a and b Hint 82). In a phasor diagram the permeance is ___ component? Real Imaginary Complex Both b and c Hint 83). A H-field is also called? Magnetizing field Magnetic field intensity Magnetic field strength All the above Hint 84). Which of the following are the other names of B-field? Magnetic flux density Magnetic induction Magnetic ambiguous All the above Hint 85). 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 Hint 86). Which of the following type of field does a hall effect measures? Magnetic Electric Electromagnetic All the above Hint 87). A law which measure V= IR is? Farads law Ohms law Lense law Newtons law Hint 88). 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 Hint 89). Magnetic type of flux is ____ type of loop? Open Closed Short Both b and c Hint 90). An alexanderson alternator is a ____ type of machine? Dynamic Static Stationary Both b and c Hint 91). An alexanderson type alternator operates similar to? AC generator DC generator ADC generator All the above Hint 92). Which of the following is the range of RF energy generated by alexanderson type alternator? 50kW 500kW 10kW 100kW Hint 93). Which of the following are reluctance type motor? Synchronous Switched reluctance Variable reluctance All the above Hint 94). Which of the following are the sub types of reluctance motor? Variable stepping Switched Synchronous All the above Hint 95). Which of the following is the disadvantage of reluctance motor? Greater ripple torque Minimum noise Greater power dissipation All the above Hint 96). A synchronous type reluctance motor contains _______ type of poles? Stator Rotor Static Both a and b Hint 97). A switched type reluctance motor is _____ type of motor? Stepper Inductance Reluctance All the above Hint 98). 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 Hint 99). A magnetic type susceptibility is ____ type constant? Dimensionless Dimension Scalar Both a and b Hint 100). Which of the following are anti-ferro magnetic type materials? Chromium Iron manganese Nickel oxide All the above Hint Time's up
