PSEB 10th Class Science Solutions For Chapter 13 – Magnetic Effects of Electric Current

PSEB 10th Class Science Solutions: Chapter 13 – Magnetic Effects of Electric Current

Understanding the Magnetic Effects of Electric Current is essential for students in the PSEB 10th class. This chapter covers various concepts related to electromagnetism, including magnetic fields, electromagnetic induction, and electric motors. Here, we present 17 previous year questions and answers that will help students prepare effectively for their exams.

PSEB 10th Class Science Solutions For Chapter 13 Key Concepts

Before diving into the questions, let’s summarize some key concepts:

• Magnetic Field: The region around a magnet where magnetic forces can be observed.
• Electromagnetism: The interaction between electricity and magnetism.
• Electromagnetic Induction: The process of generating electric current from a changing magnetic field.

PSEB 10th Class Science Solutions Chapter 13

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PSEB 10th Class Science Previous Year Questions and Answers

Question 1: What is a magnetic field?

Answer: A magnetic field is a region around a magnet where magnetic forces can be experienced. It is represented by magnetic field lines that indicate the direction and strength of the field.

Question 2: State Fleming’s Left-Hand Rule

Answer: Fleming’s Left-Hand Rule states that if you arrange your thumb, forefinger, and middle finger of your left hand perpendicular to each other, then:

• The thumb points in the direction of the force (motion).
• The forefinger points in the direction of the magnetic field.
• The middle finger points in the direction of the current.

Question 3: What happens when a current-carrying conductor is placed in a magnetic field?

Answer: A current-carrying conductor experiences a force when placed in a magnetic field. The direction of this force can be determined using Fleming’s Left-Hand Rule.

Question 4: Describe electromagnetic induction

Answer: Electromagnetic induction is the process of producing an electric current in a coil due to a changing magnetic field around it. This occurs when there is relative motion between a magnet and the coil.

Question 5: What is an electric motor?

Answer: An electric motor is a device that converts electrical energy into mechanical energy using the principle of electromagnetism. It operates based on the forces acting on current-carrying conductors placed in a magnetic field.

Magnetic Effects of Electric Current PSEB 10th Class Notes

Question 6: How does the strength of a magnetic field change with distance from a current-carrying wire?

Answer: The strength of the magnetic field decreases as you move away from a current-carrying wire. It is strongest at the wire and diminishes with distance.

Question 7: What is the right-hand thumb rule?

Answer: The right-hand thumb rule states that if you hold a current-carrying conductor with your right hand such that your thumb points in the direction of current flow, then your curled fingers will indicate the direction of the magnetic field lines around the conductor.

Question 8: Explain how to increase the strength of an electromagnet.

Answer: To increase the strength of an electromagnet, you can:

• Increase the number of turns in the coil.
• Increase the current flowing through the coil.
• Use a core material with higher magnetic permeability, such as iron.

Question 9: What is meant by “magnetic lines of force”?

Answer: Magnetic lines of force are imaginary lines that represent the direction and strength of a magnetic field. They emerge from the north pole and enter at the south pole, forming closed loops.

Question 10: How do you determine whether an induced current flows clockwise or counterclockwise?

Answer: The direction of induced current can be determined using Lenz’s Law, which states that induced current flows in such a direction as to oppose the change causing it. You can also use Fleming’s Right-Hand Rule for this purpose.

PSEB 10th Class Science Important Questions Chapter 13

Question 11: What are solenoids?

Answer: A solenoid is a long coil of wire that creates a uniform magnetic field when an electric current passes through it. Solenoids can act as electromagnets when energized.

Question 12: How does increasing current affect the force on a conductor in a magnetic field?

Answer: Increasing the current flowing through a conductor increases the force experienced by that conductor when placed in a magnetic field. This relationship is directly proportional.

Question 13: What factors affect electromagnetic induction?

Answer: The factors affecting electromagnetic induction include:

• The strength of the magnetic field.
• The speed at which the magnet moves relative to the coil.
• The number of turns in the coil.

Question 14: Explain why two coils placed close to each other can induce current in one another.

Answer: When one coil carries an alternating current, it generates a changing magnetic field. This changing magnetic field can induce an electromotive force (emf) and thus an induced current in another nearby coil due to electromagnetic induction.

Question 15: What are some applications of electromagnetic induction?

Answer: Applications include:

• Electric generators.
• Transformers.
• Induction cooktops.
• Magnetic levitation trains.

Question 16: How does an electric generator work?

Answer: An electric generator works on the principle of electromagnetic induction. When a coil rotates within a magnetic field, an emf is induced across its ends, generating electric current.

PSEB 10th Class Physics Chapter 13 Solutions

Question 17: Describe how to demonstrate that electric currents produce magnetic fields.

Answer: You can demonstrate this by performing an experiment where you pass an electric current through a straight wire and place a compass nearby. The compass needle will deflect, indicating that a magnetic field has been created around the wire due to electric current flow.

PSEB 10th Class Science Chapter 13 Conclusion

Studying Chapter 13 on Magnetic Effects of Electric Current is vital for students preparing for their PSEB Class 10 exams. By reviewing these previous year questions and answers, students can enhance their understanding and boost their confidence for upcoming assessments.