Norton’s Theorem Question & Answers June 6, 2023 By Wat Electrical This article lists 50 Norton’s Theorem MCQs for engineering students. All the Norton’s Theorem Questions & 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 Norton’s Theorem. Norton’s Theorem states that any linear electrical network with multiple sources and resistors can be simplified into an equivalent circuit with a single current source in parallel with a single resistor. This theorem is particularly useful in simplifying complex circuits and calculating the behavior of a specific component within a larger network. The step-by-step explanation of how to apply Norton’s Theorem is to Identify the portion of the circuit for which you want to find the Norton equivalent, Remove all other components from the circuit except for the portion of interest, Calculate the short-circuit current (I_Norton) that would flow through the two terminals of the portion of interest if it were shorted. Measure the equivalent resistance (R_Norton) across the terminals of the portion of interest when all the independent sources are turned off (replaced by their internal resistances). Represent the Norton equivalent circuit by a current source (I_Norton) in parallel with a resistor (R_Norton). By using Norton’s Theorem, you can simplify a complex circuit into a much simpler form while preserving its behavior with respect to the terminals of interest. This simplification makes it easier to analyze and solve circuit problems. 1). In Norton’s Theorem, the current source is represented by ___________________? Vth/Rth Vth Vth/RL Vth/RS Hint 2). The Norton current source is connected __________________? In series with the load In parallel with the load In series with the source In parallel with the source Hint 3). The equivalent resistance (Rth) in Norton’s Theorem is found by ___________________? Short-circuiting the load terminals Opening the load terminals Short-circuiting the source terminals Opening the source terminals Hint 4). Norton’s Theorem is applicable to _________________? Linear circuits only Non-linear circuits only Both linear and non-linear circuits DC circuits only Hint 5). The main advantage of Norton’s Theorem is ________________? It simplifies complex circuits It is applicable to DC circuits only It is easier to use than Thevenin’s Theorem It eliminates the need for load resistors Hint 6). In a circuit, a current source of 5A is connected in parallel with a resistance of 10Ω. What is the Norton current of the circuit? 2A 5A 10A 50A Hint 7). A circuit contains a current source of 8A connected in series with a resistance of 4Ω. What is the Norton resistance of the circuit? 2Ω 4Ω 8Ω 32Ω Hint 8). In a circuit, a current source of 2A is connected in parallel with a resistance of 6Ω. What is the Norton equivalent circuit? 2A current source in parallel with 6Ω resistor 2A current source in series with 6Ω resistor 2A current source in parallel with 3Ω resistor 2A current source in series with 3Ω resistor Hint 9). In a circuit, a current source of 3A is connected in series with a resistance of 5Ω. What is the Norton equivalent circuit? 3A current source in parallel with 5Ω resistor 3A current source in series with 5Ω resistor 3A current source in parallel with 8Ω resistor 3A current source in series with 8Ω resistor Hint 10). According to Norton's Theorem, a complex linear circuit can be replaced by a current source in parallel with a resistor. Which of the following statements is true regarding the Norton current source? It is equal to the open-circuit voltage of the circuit It is equal to the short-circuit current of the circuit It is equal to the Thevenin current source of the circuit It is equal to the Norton resistance of the circuit Hint 11). What is the relationship between Norton resistance (Rn) and Thevenin resistance (Rth) in a given circuit? Rn = Rth Rn = Rth/2 Rn = 2 * Rth Rn = Rth^2 Hint 12). When finding the Norton equivalent circuit, the load resistor is replaced by a short circuit. What is the purpose of this step? To measure the short-circuit current To measure the open-circuit voltage To determine the Norton resistance To determine the Thevenin resistance Hint 13). Which of the following statements is true regarding the Norton equivalent circuit? It provides the open-circuit voltage of the original circuit It represents the maximum power that can be transferred to the load It is obtained by shorting the output terminals of the original circuit It is used to determine the Thevenin voltage of the original circuit Hint 14). In a circuit analysis problem, if you are given the Norton current (In) and Norton resistance (Rn), how can you find the Thevenin voltage (Vth) and Thevenin resistance (Rth)? Vth = In * Rn, Rth = Rn Vth = In / Rn, Rth = In * Rn Vth = In * Rn, Rth = In / Rn Vth = In / Rn, Rth = Rn Hint 15). What is the Norton current? The current flowing through the load in a circuit The current supplied by the Norton current source The total current flowing in a circuit The short-circuit current across the load terminals Hint 16). How is the Norton current determined? By measuring the current across the load terminals By dividing the open-circuit voltage by the load resistance By short-circuiting the load and measuring the current By summing the currents of all components in the circuit Hint 17). The Norton current is equivalent to __________________? The open-circuit voltage across the load terminals The short-circuit current across the load terminals The Thevenin voltage across the load terminals The total resistance in the circuit Hint 18). The Norton current source is connected in parallel with ______________________? The voltage source in the circuit The load resistance in the circuit The current source in the circuit The short-circuit across the load terminals Hint 19). What happens to the Norton current if the load resistance is changed? The Norton current remains constant The Norton current decreases The Norton current increases The Norton current becomes zero Hint 20). A circuit consists of a current source of 4A connected to load resistance of 5Ω. Determine the Norton current? 4A 5A 20A 0.8A Hint Norton's Theorem MCQ for Interviews 21). A circuit has a Norton equivalent current of 2A and a Norton equivalent resistance of 3Ω. Calculate the voltage across the load terminals when the load resistance is 4Ω? 6V 8V 10V 12V Hint 22). In a circuit, the Norton equivalent current is 6A, and the Norton equivalent resistance is 2Ω. What is the short-circuit current across the load terminals? 3A 6A 12A 18A Hint 23). A circuit with a Norton current of 10A and a Norton resistance of 2Ω is connected to a load resistance of 5Ω. Calculate the current flowing through the load? 2A 4A 6A 8A Hint 24). In a circuit, the Norton equivalent current is 3A, and the Norton equivalent resistance is 4Ω. What is the open-circuit voltage across the load terminals? 3V 6V 9V 12V Hint 25). A circuit has a Norton current of 5A and a Norton resistance of 10Ω. Determine the power dissipated by the load resistor of 4Ω? 12.5W 20W 25W 50W Hint 26). A circuit consists of a current source of 3A and a load resistance of 6Ω. Determine the Norton equivalent resistance? 2Ω 3Ω 6Ω 9Ω Hint 27). Norton’s Theorem is used to simplify complex electrical networks by replacing them with a single _________________? Voltage source Current source Resistance Capacitor Hint 28). In Norton’s Theorem, the Norton current is found by _____________________? Short-circuiting the output terminals Open-circuiting the output terminals Replacing all resistors with short circuits Applying KCL at the output terminals Hint 29). The Norton current is equivalent to the ________________? Short-circuit current Open-circuit current Thevenin current Maximum power current Hint 30). In Norton’s Theorem, the Norton resistance is calculated by _________________? Short-circuiting the output terminals Open-circuiting the output terminals Replacing all resistors with short circuits Replacing all resistors with open circuits Hint 31). The Norton resistance is equivalent to the _________________? Thevenin resistance Short-circuit resistance Open-circuit resistance Maximum power resistance Hint 32). The current delivered to an external load by a Norton equivalent circuit is _________________? Equal to the Norton current Equal to the Thevenin current Equal to the short-circuit current Dependent on the load resistance Hint 33). The Norton equivalent circuit consists of a current source in parallel with a resistor. The resistor represents the _________________? Load resistance Internal resistance Source resistance Equivalent resistance Hint 34). Norton’s Theorem can be used to find the power dissipated by the load by ____________________? Multiplying the Norton current by the load voltage Multiplying the Norton current by the load resistance Multiplying the Norton resistance by the load voltage Multiplying the Norton resistance by the square of the load current Hint 35). The Norton current source is connected in ______________? Series with the load Parallel with the load In series with the source In parallel with the source Hint 36). Who developed the Norton Theorem? Edwin H. Armstrong Harry Nyquist William Shockley Edward Lawry Norton Hint 37). In which year was the Norton Theorem developed? 1887 1928 1947 1960 Hint 38). The Norton Theorem is commonly used in the field of ______________? Thermodynamics Computer Science Quantum Mechanics Electrical Engineering Hint 39). The Norton Theorem is an equivalent circuit theorem similar to __________________? Thevenin Theorem Ohm’s Law Faraday’s Law Kirchhoff’s Laws Hint 40). The Norton Theorem simplifies a linear, active, and bilateral network to a ________________? Current source in parallel with a resistance Voltage source in series with a resistance Current source in series with a resistance Voltage source in parallel with a resistance Hint Norton's Theorem MCQ for Quiz 41). The current source in the Norton equivalent circuit is called ________________? Norton current Thevenin current Short-circuit current Open-circuit current Hint 42). The resistance in the Norton equivalent circuit is called _________________? Norton resistance Thevenin resistance Short-circuit resistance Open-circuit resistance Hint 43). The Norton current in the equivalent circuit is equal to __________________? The short-circuit current of the original circuit The open-circuit current of the original circuit The total current of the original circuit The sum of all branch currents in the original circuit Hint 44). The Norton resistance in the equivalent circuit is equal to ___________________? The total resistance of the original circuit The open-circuit resistance of the original circuit The sum of all branch resistances in the original circuit The reciprocal of the Thevenin resistance of the original circuit Hint 45). The transmission formula in Norton’s Theorem is given by _________________? Voltage source / Resistance Current source * Resistance Voltage source * Resistance Current source / Resistance Hint 46). When finding the Norton equivalent circuit, the open circuit voltage across the load is ____________________? Zero Infinity Equal to the source voltage Equal to the Norton current Hint 47). If the load resistance is equal to the Norton equivalent resistance, the power absorbed by the load is _______________? Maximum Minimum Zero Indeterminate Hint 48). In a circuit with inductors, which of the following is true about Norton’s Theorem? It cannot be applied to circuits with inductors It can only be applied to circuits with capacitors It can be applied to circuits with both inductors and capacitors It can be applied to circuits with inductors but not capacitors Hint 49). In the Norton equivalent circuit, what is the relationship between the Norton current and the short-circuit current of the original circuit? They are equal The Norton current is half of the short-circuit current The Norton current is double the short-circuit current There is no relationship between the two Hint 50). In a circuit with capacitors, what is the effect of replacing the original circuit with the Norton equivalent circuit? The total capacitance decreases The total capacitance increases The total capacitance remains the same The total capacitance cannot be determined Hint Read more about Resistors For More MCQs Maximum Power Transfer Theorem Question & Answers Reciprocity Theorem Question & Answers Time's up