Electromagnetism MCQs

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1. Which law describes the force between two electric charges?





2. The SI unit of electric charge is:





3. Electric current is defined as the flow of:





4. What is the direction of the electric field due to a positive point charge?





5. Which of the following materials is a good conductor of electricity?





6. An electric circuit with only one path for current flow is called:





7. The phenomenon of electromagnetic induction is associated with which law?





8. The process of producing an electric current by changing the magnetic field is known as:





9. What happens to the resistance of a conductor if its length is doubled while keeping its cross-sectional area constant?





10. Which law states that the induced electromotive force (emf) is equal to the rate of change of magnetic flux?





11. The unit of magnetic field intensity (B) in the SI system is:





12. A current-carrying wire produces a magnetic field around it. This is described by:





13. What is the SI unit of electric potential difference?





14. Which of the following is not a property of a magnetic field?





15. What happens to the resistance of a conductor if its cross-sectional area is doubled?





16. Which device is used to store electric charge?





17. What does an ammeter measure?





18. Which of the following is not a method to induce electric current?





19. The direction of induced current is governed by:





20. The phenomenon where a material retains magnetism is called:





21. What type of current flows only in one direction?





22. Which material is a good insulator?





23. Which law relates magnetic field around a closed loop to electric current?





24. The rate of doing work in an electric circuit is measured in:





25. The property that opposes the flow of current is called:





26. What does a galvanometer measure?





27. In which material does current flow with almost zero resistance?





28. What type of electromagnetic radiation has the longest wavelength?





29. Which device is used to change AC voltage?





30. Which law describes the relationship between voltage, current, and resistance?






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