Kirchhoff’s Law Question & Answers October 11, 2021 By Wat Electrical Leave a Comment This article lists 100 Kirchhoff's Law MCQs for engineering students. All the Kirchhoff's Law Questions & Answers given below includes solution and link wherever possible to the relevant topic. Gustav Kirchhoff scientist in the year 1845 introduced 2 circuit laws called Kirchhoff 1 st law and 2 nd law. The main reason behind the implementation of this law was the complexities developed while measuring certain voltage and current values in a complex type electrical circuit. In other words, one can easily calculate various electrical parameters according to the specific electrical components present in the circuit, but in a situation of lumped and complicated based electrical circuits, it would be very difficult to calculate voltage and current values. Hence for this purpose Kirchhoff 1 st law current law (KCL) and Kirchhoff 2 nd law voltage law (KVL) was put forward. KCL law defines that the sum of incoming and outgoing current towards and away from a node in a circuit is equal. Whereas KVL defines the total circuit voltage as equal to the addition of drop voltage of that circuit. KVL and KCL laws are mathematically represented and solved using the matrix to obtain unknown current and voltage parameters. The advantage of using this law is it simplifies the procedure to calculate the unknown values of current and voltage of a complex circuit. But they limit in terms of assuming the absence of fluctuating magnetic fields within the loop. 1). Who introduced currents law? Gustav Kirchhoff Henry Charles Danial Both b and c Hint 2). Which of the following is a Kirchhoff’s first law? KCL KVL Current law Both a and c Hint 3). Which of the following is Kirchhoff’s second law? KCL KVL Current law Both a and c Hint 4). Which of the following Kirchhoff’s law defines addition of multiple voltages in a loop is 0? KCL KVL Voltage law Both b and c Hint 5). Which of the following Kirchhoff’s law defines incoming and outgoing sum of currents towards node are equal? KCL KVL Voltage law Both b and c Hint 6). Which of the formula defines KCL where i1, i2 are incoming currents and i3,i4 are outgoing currents from a node in a circuit? i1+i2=i3+i4 i1+i3=i2+i4 i1-i2=i3-i4 i4-i1=i2+i3 Hint 7). Which of the following electric parameters do Kirchhoff law calculate? Voltage Resistance Current Both a and c Hint Read more about circuits. 8). Which of the following law calculates resistance of electric circuit? Ohms law KCL KVL Both b and c Hint 9). A circuit is a ____ loop? Short circuited Closed Opened Both a and b Hint 10). Which of the following term in DC circuit theory connects elements? Path Node Branch Loop Hint 11). Which of the following term in DC circuit theory connects number of electrical elements? Path mesh Branch Loop Hint 12). Which of the following term in DC circuit theory connects between nodes? Path Mesh Branch Loop Hint 13). Which of the following term in DC circuit theory is a closed type path? Path Mesh Branch Loop Hint 14). Which of the following term in DC circuit theory does not have closed type path? Path Mesh Branch Loop Hint 15). Which of the following is the application of Kirchhoff’s law? Determine current in circuit Determine potential drop Determine current direction All the above Hint Read more about energy. 16). What is the value voltage across resistor r1, when r1, r2, r3 resistors of 5ohms, 10ohms and 15ohms are connected in series with 12V of voltage source? 12V 21V 10V 2V 17). Which of the following law is used for analyzing a circuit? Kirchhoff’s law Newtons law Faradays law Ohms law Hint 18). The value of current in a parallel configured circuit is _______? High Low Zero Infinity Hint 19). Which of the following satisfies KCL? Zero charge accumulation at node Possibility of charge accumulation at node A node may store energy None of the above Hint 20). KVL principle converts ___ parameter? Energy Mass Charge Momentum Hint 21). KVL is performed using___? Nodal analysis Mesh analysis Both a and b Voltage analysis Hint 22). KCL is applied to ____? Non planar networks Planar networks Both a and b Node networks Hint 23). Which of the following are the disadvantages experienced by Kirchhoff’s law? Incorrect high frequency value of AC is obtained Neglects other components electric field Ignores current flow through capacitors All the above 24). Which of the following are the components of KVL or KCL circuits? VI sources Resistors Wires All the above Hint Read more about capacitors. 25). Which of the following are the components of a resistive type circuit? Resistors Ideal voltage source Ideal current source All the above Hint Kirchhoff Law Important MCQs 26). An ideal current source provides ____ value of current? Minimum Maximum Zero Infinity Hint 27). An ideal voltage source provides ___ value of voltage? Minimum Maximum Zero Infinity Hint 28). An ideal resistor has ___ value of resistance? Minimum Maximum Zero Infinity Hint 29). Which of the following is used for representing Kirchhoff’s equations? Integration Differentiation Matrix Both a and b Hint 30). Mesh analysis has ___ steps? 2 3 5 6 Hint 31). Identify the first step of mesh analysis? Every loop is assigned with loop based current value Kirchhoff’s KVL is implemented for every loop Perform mathematical solvation to obtain loops currents value Assign each node with a resistance value Hint 32). Identify the second step of mesh analysis? Every loop is assigned with loop based current value Kirchhoff’s KVL is implemented for every loop Perform mathematical solvation to obtain loops currents value Assign each node with a resistance value Hint 33). Identify the third step of mesh analysis? Every loop is assigned with loop based current value Kirchhoff’s KVL is implemented for every loop Perform mathematical solvation to obtain loops currents value Assign each node with a resistance value Hint 34). A nodal analysis can be performed in ___ steps? 2 3 4 5 Hint 35). Which of the following is the first step of nodal analysis? Assign an arbitrary value of voltage at each node in circuit Calculate branch currents Apply KCL to each node Assign x value to a node Hint 36). Which of the following is the second step of nodal analysis? Assign an arbitrary value of voltage at each node in circuit Calculate branch currents Apply KCL to each node Assign x value to a node Hint 37). Which of the following is the third step of nodal analysis? Assign an arbitrary value of voltage at each node in circuit Calculate branch currents Apply KCL to each node Assign x value to a node Hint 38). Which of the following is the fourth step of nodal analysis? Assign an arbitrary value of voltage at each node in circuit Calculate branch currents Apply KCL to each node Perform mathematical calculation and obtain voltage at node Hint 39). If constant value of voltage or current is sent to circuit then the circuit is said to be called___ DC circuit AC circuit ADC circuit DAC circuit Hint 40). If variable value of voltage or current is sent to circuit then the circuit is said to be called___ DC circuit AC circuit ADC circuit DAC circuit Hint 41). Which of the following parameter is used for performing analysis process? Current Voltage Resistance Both a and b Hint 42). A star type configuration of electrical circuit has ___ ports? 1 2 3 4 Hint 43). A delta type configuration of electrical circuit has ___ ports? 1 2 3 4 Hint 44). How many nodes do star network have? 2 3 4 5 Hint 45). How many nodes do a delta network have? 1 2 3 4 Hint 46). Choose the advantages provided by Kirchhoff’s law? Unknown value of voltages is calculated Unknown value of current is calculated Solves complex circuits quickly All the above Hint 47). Which of the following field derives Kirchhoff’s loop law? Electrical Magnetic Electrostatic Electro magnetic Hint 48). Which of the following law is used with KCL? Ohms law Faraday law Coulomb’s law Both b and c Hint 49). Who introduced ohms law? George ohms Kirchhoff’s Fredrick Charles Hint 50). In which year ohms law was introduced? 1781 1788 1789 1777 Hint Kirchhoff Law MCQs for Quiz 51). Ohms law defines relation of ____ parameters of electrical circuit? Current Voltage Resistance All the above Hint Read more about ohms law. 52). Which of the following is units of resistor? Ohms Volts Amperes Watts Hint 53). Which of the following is units of current? Ohms Volts Amperes Watts Hint 54). Which of the following is units of power? Ohms Volts Amperes Watts Hint 55). Potential difference in a circuit is also called as____? Voltage difference Electric pressure Electric tension All the above Hint 56). The value of 1 volt is _____? 1joule 1joule/1coulomb 1colomb All the above Hint 57). What is the SI unit of potential difference? Volt Amperes Volts per meter Ampere per meter square Hint 58). Which of the following is the equation of Kirchhoff’s voltage law? Del X E = -dB/dt = 0 Del X B = -dB/dt = 0 Del X H = -dB/dt = 0 Del X E = -dB/dt = 1 Hint 59). Nodal analysis of an electric circuit is also called______? Node voltage analysis Branch current method Nodal analysis All the above Hint 60). Kirchhoff’s law can also be represented using______? Maxwell equation Quantum equations Hall effect All the above Hint 61). Faradays law is based on ___ principle? Electromagnetism Electro mechanical Mechanical Both a and b Hint 62). Which of the following is the application of electromagnetic induction? Inductors Transformers All the above Hint 63). Who implemented electromagnetic induction? Michael Faraday Harry Faraday Charles Farads All the above Hint 64). What is value of current if charge of 20 coulomb is sent through a point of 0.25seconds? 20A 80A 2A 10A Hint 65). Which of the following is the condition for equivalent circuit? Contains multiple passive elements Connects components in series or parallel Replacing multiple components in to single equivalent circuit All the above Hint 66). In how many types can a equivalent circuit be constructed? 2 3 4 1 Hint 67). Electrical representation of network graph is represented using______ types? 2 1 3 4 Hint 68). A matrix that represents an electrical circuit is called____? Incident matrix Fundamental cut set matrix Fundamental loop matrix Both b and c Hint 69). An incident matrix is also called as _____? Node incidence matrix Node to branch incidence matrix Node to node matrix Both a and b Hint 70). How many values do an incident matrix represents currents status in circuit? 2 3 1 4 Hint 71). Which of the following represent that current leaving the node in an electric circuit of an incident matrix? +1 -1 0 Both a and b Hint 72). Which of the following represent that current going towards the node in an electric circuit of an incident matrix? +1 -1 0 Both a and b Hint 73). Which of the following represent that current is either entering or leaving the node in an electric circuit of an incident matrix? +1 -1 0 Both a and b Hint 74). How steps are required to calculate an incident matrix? 2 1 3 4 Hint 75). Which of the following is the first step of incidence matrix of directed graph? Choose a node Assign values to element Check for direction Repeat the previous steps Hint Kirchhoff Law MCQs for Exams 76). Which of the following is the second step of incidence matrix of directed graph? Choose a node Assign values to element and check for direction Repeat the previous steps All the above Hint 77). KVL law of idea is also called as _____? Conservation of energy Consumption of energy Divergence of power None of the above Hint 78). An electronic circuit consist of ___ types of components? 2 3 4 5 Hint 79). Which of the following component depends on external source to operate in an electric circuit? Active Passive Independent All the above Hint Read more about active and passive components. 80). Which of the following component generates power and supplies to its dependent component to operate in an electric circuit? Active Passive Dependent All the above Hint 81). Which of the following are the examples of passive components? Capacitors Resistors Coils All the above Hint 82). Which of the following are the examples of active components? Voltage source Current source Op-amps All the above Hint 83). How many types of voltage source are preset in an electrical circuit? 1 2 3 4 Hint 84). A voltage source supplying circuit with constant input voltage is called ___? AC source DC source Constant source Both b and c Hint 85). A voltage source supplying circuit with varying input voltage is called ___? AC source DC source Constant source Both b and c Hint 86). A current source in an electrical circuit are of ____ types? 2 3 1 4 Hint 87). A current source supplying circuit with varying input current is called ___? AC source DC source Constant source Both b and c Hint 88). A current source supplying circuit with constant input current is called ___? AC source DC source Constant source Both b and c Hint 89). An electrical component that blocks the flow of current is called______? Capacitor Resistor Inductor Transistor Hint Read more about resistors. 90). An electrical component that stores charge in circuit is called______? Capacitor Resistor Inductor Transistor Hint 91). An electrical component that prevents abrupt changes in circuit is called______ Capacitor Resistor Inductor Transistor Hint 92). A resistor is classified into ___ types? 2 3 4 5 Hint 93). Which of the following are the examples of resistors? Thermistors Varistor Diodes All the above Hint 94). A varistors are classified into ___ types? 2 3 4 5 Hint Read more about varistor. 95). Which of the following is the application of capacitor? Batteries Microphones Inventors All the above Hint Read more about inverters. 96). A capacitors was invented by___? Georg von Pieter van Leyden Harry Hint 97). A capacitor has ___ number of conductors? 2 3 4 5 Hint 98). A capacitor is represented using ____ formula? C=Q/V C=QV C=Q-V C=Q+V Hint 99). A capacitor are of ___ types? 2 3 4 5 Hint 100). A non polarized type capacitor is of ___ types? 2 3 4 5 Hint Time is Up! Time's up
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