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Electromagnetic Fields and Waves MCQs

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1. Which of the following equations represents Faraday’s law of electromagnetic induction?





2. The speed of light in a vacuum is approximately:





3. Which one of Maxwell’s equations describes the relationship between electric charges and electric fields?





4. In electromagnetic waves, the electric field and magnetic field are:





5. Which of the following electromagnetic waves has the highest frequency?





6. The SI unit of magnetic flux is:





7. An AC circuit consists of a resistor, inductor, and capacitor in series. The phase relationship between voltage and current is:





8. The wavelength of an electromagnetic wave is:





9. Which material exhibits the highest permeability?





10. In an LC circuit, resonance occurs when:





11. The radiation pattern of a half-wave dipole antenna is:





12. Total internal reflection occurs when light travels from:





13. The principle of superposition applies to:





14. The skin effect in conductors increases with:





15. An electromagnetic wave incident on a medium with higher refractive index results in:





16. The Poynting vector S represents:





17. Energy stored in a capacitor is:





18. Common dielectric material in capacitors:





19. Electromagnetic waves are generated by:





20. Polarization of light is related to:





21. A characteristic of a good antenna is:





22. Unit of inductance:





23. Capacitance of a parallel plate capacitor is directly proportional to:





24. Electromagnetic waves in vacuum:





25. A wave has frequency 5 Hz. Its period is:





26. Transformer primary 100 turns, secondary 200 turns, primary voltage 120 V AC. Secondary voltage:





27. Magnetic field inside a long solenoid:





28. EM wave with longest wavelength:





29. Reducing unwanted reflections in optical devices is called:





30. Electric flux through a closed surface related to net enclosed charge:





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