Cbse Class 10 Science Chapter 12 Important Questions - Magnetic Effects Of Electric Current

Prepare for the CBSE Class 10 Board Exams with this guide on CBSE Class 10 Science Chapter 12 Important Questions - Magnetic Effects of Electric Current. It covers essential topics like magnetic fields, electromagnetic induction, and applications of electric current, helping you build a strong foundation for exam success.

Cbse Class 10 Science Chapter 12 Important Questions - Magnetic Effects Of Electric Current

Here are 50 important questions on Cbse Class 10 Science Chapter 12 Important Questions - Magnetic Effects Of Electric Current

1. What causes a compass needle to deflect when near a bar magnet?
2. How do you draw magnetic field lines around a bar magnet?
3. What are the properties of magnetic field lines?
4. Why do two magnetic field lines not intersect each other?
5. How does the right-hand rule apply to determine the direction of the magnetic field in a circular loop of wire?
6. What diagram represents a uniform magnetic field?
7. What is the behavior of the magnetic field inside a long straight solenoid carrying current?
8. Which property of a proton changes while moving freely in a magnetic field?
9. How does increasing the current in rod AB affect its displacement in a magnetic field?
10. What happens to rod AB's displacement when using a stronger horse-shoe magnet?
11. How does increasing the length of rod AB affect its displacement in a magnetic field?
12. What direction does a positively charged particle (alpha-particle) deflected by a magnetic field take if projected west?
13. Name two safety measures commonly used in electric circuits and appliances.
14. What happens when an electric oven with a 2 kW power rating operates in a circuit rated for 5 A?
15. What precautions should be taken to avoid overloading domestic electric circuits?
16. How is the magnetic field near a long straight wire described?
17. What occurs to the current during a short circuit in an electric circuit?
18. Are these statements true or false: "The field at the center of a long circular coil carrying current will be parallel straight lines" and "A wire with green insulation is usually the live wire"?
19. List two methods for producing magnetic fields.
20. When is the force on a current-carrying conductor placed in a magnetic field greatest?
21. If an electron beam is deflected by a magnetic field to your right, what is the direction of that magnetic field?
22. What rule determines the direction of the magnetic field around a straight conductor carrying current?
23. How do you find the direction of force experienced by a current-carrying straight conductor in a perpendicular magnetic field?
24. When does an electric short circuit occur?
25. What is the function of an earth wire, and why is it necessary for metallic appliances?
26. How do you apply Fleming’s left-hand rule to find the direction of force on a current-carrying conductor?
27. Describe how to determine the direction of induced current in a coil rotating in a magnetic field.
28. Explain how to identify the direction of the magnetic field produced around a straight conductor.
29. What factors affect the magnitude of force experienced by a current-carrying conductor in a magnetic field?
30. Why is it crucial to ensure that live and neutral wires do not come into contact?
31. How can you visualize the strength and direction of magnetic fields using iron filings or similar methods?
32. Describe how safety devices like fuses work in electrical circuits.
33. Discuss how alternating current (AC) differs from direct current (DC) concerning magnetic effects.
34. Explain how electromagnetic induction occurs and its applications.
35. What is Lenz's Law, and how does it relate to induced currents in conductors?
36. How do solenoids create uniform magnetic fields, and what are their applications?
37. Describe how electric motors utilize magnetic fields to produce motion.
38. Explain how generators convert mechanical energy into electrical energy using electromagnetic principles.
39. Discuss how transformers operate based on electromagnetic induction principles.
40. What role do superconductors play in creating strong magnetic fields, and what are their potential applications?
41. How do different materials affect the strength and direction of magnetic fields produced by currents?
42. Describe Faraday's law of electromagnetic induction and its significance.
43. Explain how Earth's magnetic field affects compass navigation.
44. Discuss safety protocols when working with high-voltage electrical equipment.
45. How can you calculate the force acting on a charged particle moving through a magnetic field?
46. Describe practical experiments that demonstrate electromagnetic principles, such as Oersted's experiment.
47. Explain how inductors function within electrical circuits and their importance.
48. Discuss how varying current affects the heat generated in resistive materials within circuits.
49. Explain why certain materials are considered ferromagnetic and their applications in technology.
50. Discuss future advancements in electromagnetism research and their potential impact on technology.

These questions cover various aspects of magnetism related to electric currents, safety measures, and practical applications as outlined in Chapter 12 of your document on Magnetic Effects of Electric Current.

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Class 10 Magnetic Effects of Electric Current Notes

This chapter explores the relationship between electricity and magnetism, the behavior of magnetic fields, and their applications in daily life, including the functioning of domestic electric circuits.

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1. Magnetic Field and Field Lines

Magnetic Field (B):

• The region around a magnet or current-carrying conductor where magnetic force can be experienced.

Magnetic Field Lines:

• Characteristics:

1. Magnetic field lines emerge from the north pole and merge at the south pole.

2. They never intersect each other.

3. Closer field lines indicate a stronger magnetic field.

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2. Magnetic Field Due to a Current-Carrying Conductor

Magnetic Field Around a Straight Conductor:

• The field lines are concentric circles around the conductor.

• Right-Hand Thumb Rule:

If the thumb of the right hand points in the direction of the current, the curled fingers indicate the direction of the magnetic field.

Magnetic Field Due to a Circular Loop:

• At the center of the loop, the magnetic field is straight and perpendicular to the plane of the loop.

• The field strength increases with the current and the number of turns in the loop.

Magnetic Field Due to a Solenoid:

• A solenoid is a coil of many circular turns of wire.

• Properties:

• The magnetic field inside the solenoid is uniform and strong.

• Outside, the field resembles that of a bar magnet.

• Applications: Used in electromagnets.

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3. Force on a Current-Carrying Conductor in a Magnetic Field

• When a current-carrying conductor is placed in a magnetic field, it experiences a force.

• Direction of Force: Given by Fleming’s Left Hand Rule:

• Stretch the thumb, forefinger, and middle finger of your left hand so that they are mutually perpendicular.

• Forefinger: Direction of magnetic field.

• Middle finger: Direction of current.

• Thumb: Direction of the force.

Applications:

1. Electric motor.

2. Moving coil galvanometer.

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4. Fleming’s Rules

• Fleming’s Left Hand Rule: Used to find the direction of force on a conductor in a magnetic field.

• Fleming’s Right Hand Rule: Used to find the direction of induced current in a generator.

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5. Current Types: Direct Current and Alternating Current

Direct Current (DC):

• Current flows in one direction.

• Used in batteries.

Alternating Current (AC):

• Current reverses direction periodically.

• Frequency in India: 50 \, \text{Hz} (i.e., reverses 50 times per second).

Advantages of AC Over DC:

1. Easier to generate and transmit over long distances.

2. Can be easily stepped up or down in voltage using transformers.

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6. Domestic Electric Circuits

Components:

1. Main Switch: Controls the supply of electricity to the house.

2. Electric Meter: Measures energy consumption in kilowatt-hours.

3. Distribution Box: Contains fuses and circuit breakers for safety.

4. Live, Neutral, and Earth Wires:

• Live Wire: Carries current to the appliances (red or brown).

• Neutral Wire: Completes the circuit (black or blue).

• Earth Wire: Provides safety by directing excess current to the ground (green).

Safety Devices in Circuits:

• Fuse: Protects appliances from overcurrent by melting and breaking the circuit.

• MCB (Miniature Circuit Breaker): Automatically trips off in case of excess current.

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Conclusion:

The chapter Magnetic Effects of Electric Current covers the fundamental principles of electromagnetism, including magnetic fields and electromagnetic induction.

These concepts are critical for the CBSE Class 10 Board Exams. Students should focus on CBSE Class 10 Science Chapter 12 Important Questions - Magnetic Effects of Electric Current and solve sample papers for effective exam preparation.

Regular revision and well-structured notes will ensure success in this chapter with reference to Class 10 Science Syllabus

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Other Chapters:

Chapter 1 Chemical Reactions And Equations

Chapter 2 Acids, Bases, And Salts

Chapter 3 Metals And Non-Metals

Chapter 4 Carbon and its compounds

Chapter 5 Life Processes

Chapter 6 Control And Coordination

Chapter 7 How Do Organisms Reproduce?

Chapter 8 Heredity And Evolution

Chapter 9 Light – Reflection And Refraction

Chapter 10 The Human Eye And The Colourful World

Chapter 11 Electricity

Chapter 12 Magnetic Effects Of Electric Current

Chapter 13 Our Environment

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Also Refer:

Class 10 Science NCERT Book PDF

Class 10 Science Sample Papers

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