Mutual Induction Question & AnswersMay 27, 2023 By Wat Electrical This article lists 50 Mutual induction MCQs for engineering students. All the Mutual induction Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of Mutual induction .Mutual induction is a phenomenon that occurs when a changing magnetic field in one coil induces an electromotive force (EMF) or voltage in an adjacent coil. This phenomenon is based on Faraday's law of electromagnetic induction. Mutual induction typically involves two coils, known as the primary coil and the secondary coil. These coils are usually wound on a shared magnetic core made of a ferromagnetic material like iron. The core enhances the magnetic coupling between the coils.The changing magnetic field induces an EMF in the secondary coil according to Faraday's law of electromagnetic induction. The induced EMF causes a current to flow in the secondary coil if the circuit is closed.Mutual induction is a fundamental concept in electrical engineering and plays a crucial role in many electrical devices and systems. It allows for efficient transfer of energy between coils and is the basis for the operation of transformers, which are essential in power generation, transmission, and distribution. 1). Mutual induction is based on which law of electromagnetism ____________________? Ampere’s law Ohm’s law Faraday’s law Coulomb’s law None Hint2). Mutual induction occurs between __________________? A single coil and a permanent magnet Two separate coils A coil and a capacitor A coil and a resistor None HintRead more about Mutual induction 3). Which of the following is an application of mutual induction? Generating static electricity Controlling the flow of current in a circuit Transmitting data through fiber-optic cables Stepping up or stepping down voltage in a transformer None Hint4). The core material used in transformers for mutual induction is typically _________________? Copper Aluminum Iron Silver None Hint5). The primary coil of a transformer is connected to a 120V AC source. If the turns ratio between the primary and secondary coils is 1:5, what is the voltage across the secondary coil? 120V 600V 24V 500V None Hint6). Mutual induction occurs when ___________________? A current flows in a single coil A changing magnetic field induces a voltage in an adjacent coil Two coils have the same number of turns A magnetic field is generated due to a permanent magnet None Hint7). Which of the following is an application of mutual induction? Generating a magnetic field in a solenoid Charging a battery using solar panels Transmitting electrical power through high-voltage lines Producing a sound wave in a loudspeaker None Hint8). In mutual induction, the primary coil __________________? Has a higher number of turns than the secondary coil Has a lower resistance than the secondary coil Induces a voltage in the secondary coil Is connected in parallel with the secondary coil None Hint9). Transformers are based on the principle of __________________? Self-induction Mutual induction Electrostatic induction Magnetic permeability None HintRead more about Transformers 10). The magnetic coupling between two coils can be increased by ______________________? Increasing the distance between the coils Decreasing the number of turns in the coils Introducing a non-magnetic material between the coils Using a ferromagnetic core None Hint11). Mutual induction is commonly used in ________________? Inductive charging systems Light-emitting diodes (LEDs) Voltage regulators Capacitors None Hint12). In a transformer, the coil connected to the power source is called the __________________? Primary coil Secondary coil Inductive coil Mutual coil None Hint13). Which component enhances the magnetic coupling between two coils in mutual induction? Capacitor Resistor Diode Magnetic core None Hint14). Which formula represents the calculation of mutual inductance between two coils? M = k * sqrt(L1 * L2) M = V / I M = R * I M = C / V None Hint15). Leakage inductance occurs due to _______________________? Perfect coupling between coils Imperfect coupling between coils The absence of a magnetic field Excessive current flow None HintMutual induction MCQ for Exams16). The mutual inductance between two coils is 5 H. If the self-inductance of one coil is 3 H and the coupling coefficient is 0.8, what is the self-inductance of the other coil? 3.2 H 3.6 H 5.6 H 6.4 H None Hint17). Two coils have a mutual inductance of 8 mH. If the self-inductance of one coil is 10 mH and the coupling coefficient is 0.5, what is the self-inductance of the other coil? 4 mH 6 mH 8 mH 16 mH None Hint18). The mutual inductance between two coils is 10 μH. If the self-inductance of one coil is 6 μH and the mutual inductance coefficient is 0.6, what is the self-inductance of the other coil? 4 μH 8 μH 12 μH 16 μH None Hint19). What is the formula for calculating the induced voltage (V) in a coil due to mutual inductance? V = M * I V = M * (dI/dt) V = M * R V = M * (dR/dt) None Hint20). What does the symbol ‘M’ represent in the mutual inductance formula? Self-inductance of the first coil Self-inductance of the second coil Mutual inductance between the two coils Coupling coefficient between the two coils None Hint21). What is the significance of the coupling coefficient ‘k’ in the mutual inductance formula? It represents the ratio of the number of turns in the two coils. It represents the magnetic permeability of the medium between the coils. It quantifies the extent of magnetic coupling between the two coils. It represents the resistance of the coils. None Hint22). How does an increase in the self-inductances of the two coils affect their mutual inductance? Mutual inductance increases linearly. Mutual inductance decreases linearly. Mutual inductance remains unchanged. Mutual inductance increases proportionally to the square root. None Hint23). In a transformer, if the coupling between the primary and secondary windings is reduced, what happens to the leakage inductance? Leakage Inductance decreases. Leakage inductance increases Leakage inductance remains unchanged. Leakage inductance becomes zero. None Hint24). The relationship between mutual inductance (M), primary current (I1), and induced voltage in the secondary coil (V2) is given by _____________________? M = V2 / I1 M = I1 / V2 V2 = M × I1 I1 = M × V2 None Hint25). If the coefficient of coupling between two coils is 0.8, it means ____________________? There is no coupling between the coils. There is maximum coupling between the coils. 80% of the magnetic field of one coil links with the other coil. 20% of the magnetic field of one coil links with the other coil. None Hint26). When the current in one coil changes at a rate of 5 A/s, an induced voltage of 10 V is observed in the second coil. The mutual inductance between the coils is ___________________________? 0.5 H 2 H 50 H 200 H None Hint27). In a transformer, if the primary voltage is increased while keeping the number of turns constant, the secondary voltage will _____________________? Increase Decrease Remain the same Become zero None Hint28). The coefficient of coupling (k) ranges from ___________________? 0 to 1 -1 to 1 -∞ to ∞ 1 to ∞ None Hint29). Which of the following statements about mutual inductance is true? It is only applicable in DC circuits. It is used in the transmission of radio waves. It is not affected by the physical separation of coils. It can be used to measure resistance. None Hint30). Mutual inductance is crucial for the functioning of __________________? Generators Batteries Thermocouples Microprocessors None HintMutual induction MCQ for Interviews31). Which of the following is an application of mutual inductance in electronics? Generating electricity from sunlight Transmitting wireless signals Filtering noise in audio signals Measuring temperature changes None Hint32). Mutual inductance is responsible for the operation of which of the following devices? Electric motors Solar panels Light bulbs Magnetic levitation trains None HintRead more about electric motors33). The phenomenon of electromagnetic induction is governed by ______________________? Ohm’s law Coulomb’s law Ampere’s law Faraday’s law None Hint34). Which of the following materials is most commonly used as a core material in electromagnets? Aluminum Copper Iron Silver None Hint35). The SI unit of magnetic field strength is _____________________? Volt Ampere Tesla Ohm None Hint36). According to Lenz’s law, the induced current in a circuit will flow in a direction that ________________________? Opposes the change in magnetic field Enhances the change in magnetic field Follows the change in magnetic field Is independent of the change in magnetic field None Hint37). A device used to increase or decrease voltage levels in AC circuits is called a _______________________? Capacitor Resistor Transformer Diode None Hint38). Which of the following devices utilizes inductive coupling for wireless communication? Bluetooth earphones USB flash drive Ethernet cable HDMI cable None Hint39). The primary coil of a transformer is connected to a source of alternating current (AC). The secondary coil of the transformer is connected to a load. The transfer of energy from the primary coil to the secondary coil occurs through ____________________? Capacitive coupling Resistive coupling Inductive coupling Optical coupling None Hint40). Inductive coupling is commonly used in which of the following applications? Wireless charging Audio speakers Electric motors Solar panels None Hint41). Mutual inductance is independent of ____________________? The physical dimensions of the coils The permeability of the material between the coils The frequency of the current in the coils The voltage applied to the coils None Hint42). Mutual inductance can be categorized into two types based on the arrangement of the coils. They are ___________________? Series and parallel Self and mutual Primary and secondary Active and passive None Hint43). The operation of mutual inductance involves the transfer of ___________________? Voltage Current Power Frequency None Hint44). In a transformer, the primary coil is connected to a power source, and the secondary coil is connected to a load. The purpose of the mutual inductance in this setup is to ______________________? Step up or step down the voltage Increase the current flow Generate a magnetic field Store electrical energy None Hint45). In wireless power transfer systems, mutual inductance is utilized to transfer energy ______________________? Through direct electrical contact Via electromagnetic waves By converting energy into heat Using capacitive coupling None Hint46). In a circuit with mutual inductance, if the current in one coil is steady, the induced voltage in the other coil will be _____________________? Steady Alternating Zero Random None Hint47). Maxwell’s formula is valid for ___________________? Any type of coils Only air-core coils Only iron-core coils Only solenoid-type coils None Hint48). If the inductances of the two coils are known, Maxwell’s formula allows us to calculate the ____________________? Current flowing through the coils Voltage across the coils Power dissipated by the coils Mutual inductance between the coils None Hint49). Maxwell’s formula assumes that the two coils ___________________? Have negligible resistance Have equal number of turns Are spaced far apart Are not coupled magnetically None Hint50). In Maxwell’s formula, if the inductances of the two coils are given in henrys, the resulting mutual inductance will be in ____________________? Ohms Farads Henrys Amperes None Hint Time's up
