Electromagnetism MCQs

Question: Which law describes the force between two electric charges? A) Faraday’s Law B) Ampere’s Law C) Coulomb’s Law D) Ohm’s Law Answer: C) Coulomb’s Law Question: The SI unit of electric charge is: A) Volt (V) B) Coulomb (C) C) Ampere (A) D) Ohm (Ω) Answer: B) Coulomb (C) Question: Electric current is defined as the flow of: A) Protons B) Neutrons C) Electrons D) Positrons Answer: C) Electrons Question: What is the direction of the electric field due to a positive point charge? A) Away from the charge B) Towards the charge C) Parallel to the charge D) Perpendicular to the charge Answer: A) Away from the charge Question: Which of the following materials is a good conductor of electricity? A) Rubber B) Glass C) Copper D) Plastic Answer: C) Copper Question: An electric circuit with only one path for current flow is called: A) Series circuit B) Parallel circuit C) Open circuit D) Closed circuit Answer: D) Closed circuit Question: The phenomenon of electromagnetic induction is associated with which law? A) Gauss’s Law B) Ampere’s Law C) Ohm’s Law D) Faraday’s Law Answer: D) Faraday’s Law Question: The process of producing an electric current by changing the magnetic field is known as: A) Electromagnetic induction B) Capacitance C) Resistance D) Conductance Answer: A) Electromagnetic induction Question: What happens to the resistance of a conductor if its length is doubled while keeping its cross-sectional area constant? A) It doubles B) It quadruples C) It halves D) It remains the same Answer: A) It doubles Question: Which law states that the induced electromotive force (emf) in a circuit is equal to the rate of change of magnetic flux through the circuit? A) Lenz’s Law B) Faraday’s Law C) Coulomb’s Law D) Ampere’s Law Answer: B) Faraday’s Law Question: The unit of magnetic field intensity (B) in the SI system is: A) Weber (Wb) B) Tesla (T) C) Henry (H) D) Gauss (G) Answer: B) Tesla (T) Question: A current-carrying wire produces a magnetic field around it. This statement is described by: A) Lenz’s Law B) Faraday’s Law C) Ampere’s Law D) Biot-Savart Law Answer: D) Biot-Savart Law Question: What is the SI unit of electric potential difference (voltage)? A) Joule (J) B) Watt (W) C) Volt (V) D) Ohm (Ω) Answer: C) Volt (V) Question: Which of the following is not a property of a magnetic field? A) It can exert forces on magnetic materials B) It is a scalar quantity C) It can induce electric currents D) It can be produced by moving charges Answer: B) It is a scalar quantity Question: What happens to the resistance of a conductor if its cross-sectional area is doubled while keeping its length constant? A) It doubles B) It quadruples C) It halves D) It reduces by one-fourth Answer: D) It reduces by one-fourth Question: Which of the following is a device used to store electric charge? A) Resistor B) Capacitor C) Inductor D) Transformer Answer: B) Capacitor Question: What does an ammeter measure? A) Voltage B) Current C) Resistance D) Capacitance Answer: B) Current Question: Which of the following is not a method to induce an electric current in a circuit? A) Moving a magnet near a coil B) Changing the resistance of the circuit C) Rotating a coil in a magnetic field D) Changing the area of a coil in a magnetic field Answer: B) Changing the resistance of the circuit Question: The direction of induced current in a conductor moving in a magnetic field is governed by: A) Ohm’s Law B) Ampere’s Law C) Lenz’s Law D) Coulomb’s Law Answer: C) Lenz’s Law Question: The phenomenon where a material retains its magnetism after the applied magnetic field is removed is called: A) Paramagnetism B) Ferromagnetism C) Diamagnetism D) Electromagnetism Answer: B) Ferromagnetism Question: What type of current flows only in one direction? A) DC (Direct Current) B) AC (Alternating Current) C) Both DC and AC D) None of the above Answer: A) DC (Direct Current) Question: Which of the following materials is a good insulator? A) Copper B) Aluminum C) Glass D) Silver Answer: C) Glass Question: Which law relates the magnetic field around a closed loop to the electric current passing through the loop? A) Gauss’s Law for Magnetism B) Biot-Savart Law C) Ampere’s Law D) Faraday’s Law Answer: C) Ampere’s Law Question: The rate of doing work in an electric circuit is measured in: A) Watts (W) B) Joules (J) C) Coulombs (C) D) Volts (V) Answer: A) Watts (W) Question: The property of an electric circuit that opposes the flow of current is known as: A) Conductance B) Impedance C) Resistance D) Inductance Answer: C) Resistance Question: What does a galvanometer measure? A) Voltage B) Current C) Resistance D) Capacitance Answer: B) Current Question: Which law describes the magnetic field produced by a steady electric current? A) Faraday’s Law B) Ampere’s Law C) Lenz’s Law D) Ohm’s Law Answer: B) Ampere’s Law Question: What is the term for the opposition to the change in current flow in an inductor? A) Capacitance B) Impedance C) Inductance D) Reactance Answer: D) Reactance Question: In which material does current flow with almost zero resistance at very low temperatures? A) Copper B) Aluminum C) Superconductor D) Nichrome Answer: C) Superconductor Question: What is the unit of magnetic flux density? A) Tesla (T) B) Weber (Wb) C) Henry (H) D) Gauss (G) Answer: A) Tesla (T) Question: What type of electromagnetic radiation has the longest wavelength? A) X-rays B) Ultraviolet C) Infrared D) Radio waves Answer: D) Radio waves Question: Which device is used to change the voltage of alternating current? A) Capacitor B) Transformer C) Diode D) Inductor Answer: B) Transformer Question: What is the SI unit of magnetic flux? A) Ohm (Ω) B) Weber (Wb) C) Tesla (T) D) Volt (V) Answer: B) Weber (Wb) Question: Which electromagnetic wave has the shortest wavelength? A) Gamma rays B) X-rays C) Ultraviolet D) Visible light Answer: A) Gamma rays Question: Which of the following is not a type of electromagnetic radiation? A) Microwaves B) Sound waves C) Gamma rays D) Radio waves Answer: B) Sound waves Question: What is the effect of placing a conductor near a changing magnetic field? A) Induced electric field B) Induced magnetic field C) Induced electric current D) Induced charge Answer: C) Induced electric current Question: Which law describes the relationship between the voltage across a conductor, the current through it, and its resistance? A) Faraday’s Law B) Ampere’s Law C) Ohm’s Law D) Lenz’s Law Answer: C) Ohm’s Law Question: What is the phenomenon where a magnetic material becomes a magnet when placed in a magnetic field? A) Ferromagnetism B) Diamagnetism C) Paramagnetism D) Electromagnetism Answer: A) Ferromagnetism Question: Which of the following is a measure of the opposition to the flow of alternating current in a circuit? A) Capacitance B) Impedance C) Resistance D) Inductance Answer: B) Impedance Question: In an AC circuit, the direction of current changes: A) Periodically B) Irregularly C) Never D) In one direction only Answer: A) Periodically Question: Which of the following is not a type of magnet? A) Permanent magnet B) Electromagnet C) Supermagnet D) Temporary magnet Answer: C) Supermagnet Question: What is the purpose of a rectifier in an electrical circuit? A) To regulate voltage B) To store charge C) To convert AC to DC D) To amplify current Answer: C) To convert AC to DC Question: What does an oscilloscope measure? A) Voltage B) Current C) Frequency D) Waveform Answer: D) Waveform Question: Which law describes the relationship between the magnetic field induced around a closed loop and the rate of change of electric flux through the loop? A) Gauss’s Law for Magnetism B) Biot-Savart Law C) Ampere’s Law D) Faraday’s Law Answer: D) Faraday’s Law Question: Which material loses its ferromagnetic properties when the external magnetic field is removed? A) Paramagnetic material B) Ferromagnetic material C) Diamagnetic material D) Superconductor Answer: A) Paramagnetic material Question: What type of current flows back and forth along a conductor? A) DC (Direct Current) B) AC (Alternating Current) C) Both DC and AC D) None of the above Answer: B) AC (Alternating Current) Question: Which law states that the magnetic field lines form closed loops with no beginning or end? A) Gauss’s Law for Magnetism B) Biot-Savart Law C) Ampere’s Law D) Lenz’s Law Answer: A) Gauss’s Law for Magnetism Question: Which of the following does not affect the resistance of a conductor? A) Length of the conductor B) Cross-sectional area of the conductor C) Temperature of the conductor D) Voltage applied across the conductor Answer: D) Voltage applied across the conductor Question: What does a capacitor store? A) Electric charge B) Magnetic field C) Voltage D) Current Answer: A) Electric charge Question: Which of the following is not an application of electromagnetism? A) Electric motors B) MRI machines C) Radio communication D) Wind turbines Answer: D) Wind turbines

Electromagnetism MCQs

More MCQs on Avionics Engineering MCQs

Leave a Comment Cancel reply