Mutual Induction Question & Answers May 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 Hint 2). Mutual induction occurs between __________________? A single coil and a permanent magnet Two separate coils A coil and a capacitor A coil and a resistor Hint Read 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 Hint 4). The core material used in transformers for mutual induction is typically _________________? Copper Aluminum Iron Silver Hint 5). 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 Hint 6). 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 Hint 7). 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 Hint 8). 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 Hint 9). Transformers are based on the principle of __________________? Self-induction Mutual induction Electrostatic induction Magnetic permeability Hint Read 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 Hint 11). Mutual induction is commonly used in ________________? Inductive charging systems Light-emitting diodes (LEDs) Voltage regulators Capacitors Hint 12). In a transformer, the coil connected to the power source is called the __________________? Primary coil Secondary coil Inductive coil Mutual coil Hint 13). Which component enhances the magnetic coupling between two coils in mutual induction? Capacitor Resistor Diode Magnetic core Hint 14). 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 Hint 15). Leakage inductance occurs due to _______________________? Perfect coupling between coils Imperfect coupling between coils The absence of a magnetic field Excessive current flow Hint Mutual induction MCQ for Exams 16). 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 Hint 17). 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 Hint 18). 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 Hint 19). 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) Hint 20). 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 Hint 21). 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. Hint 22). 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. Hint 23). 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. Hint 24). 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 Hint 25). 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. Hint 26). 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 Hint 27). 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 Hint 28). The coefficient of coupling (k) ranges from ___________________? 0 to 1 -1 to 1 -∞ to ∞ 1 to ∞ Hint 29). 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. Hint 30). Mutual inductance is crucial for the functioning of __________________? Generators Batteries Thermocouples Microprocessors Hint Mutual induction MCQ for Interviews 31). 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 Hint 32). Mutual inductance is responsible for the operation of which of the following devices? Electric motors Solar panels Light bulbs Magnetic levitation trains Hint Read more about electric motors 33). The phenomenon of electromagnetic induction is governed by ______________________? Ohm’s law Coulomb’s law Ampere’s law Faraday’s law Hint 34). Which of the following materials is most commonly used as a core material in electromagnets? Aluminum Copper Iron Silver Hint 35). The SI unit of magnetic field strength is _____________________? Volt Ampere Tesla Ohm Hint 36). 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 Hint 37). A device used to increase or decrease voltage levels in AC circuits is called a _______________________? Capacitor Resistor Transformer Diode Hint 38). Which of the following devices utilizes inductive coupling for wireless communication? Bluetooth earphones USB flash drive Ethernet cable HDMI cable Hint 39). 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 Hint 40). Inductive coupling is commonly used in which of the following applications? Wireless charging Audio speakers Electric motors Solar panels Hint 41). 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 Hint 42). 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 Hint 43). The operation of mutual inductance involves the transfer of ___________________? Voltage Current Power Frequency Hint 44). 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 Hint 45). 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 Hint 46). 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 Hint 47). Maxwell’s formula is valid for ___________________? Any type of coils Only air-core coils Only iron-core coils Only solenoid-type coils Hint 48). 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 Hint 49). Maxwell’s formula assumes that the two coils ___________________? Have negligible resistance Have equal number of turns Are spaced far apart Are not coupled magnetically Hint 50). 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 Hint Time's up
