Physics Year 2: Magnetic Effect of Electric Current

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Questions and Answers

What does magnetic flux density describe about the magnetic field?

  • The speed at which the magnetic field propagates
  • The density and direction of field lines through a certain area (correct)
  • The total strength of the magnetic field over time
  • The energy stored in the magnetic field

Which of the following best represents the relationship between magnetic flux and magnetic flux density?

  • Magnetic flux density is dependent on the velocity of moving charges
  • Magnetic flux density can exist without magnetic flux
  • Magnetic flux represents only the strength of the magnetic field
  • Magnetic flux is the product of magnetic flux density and area (correct)

What factor does NOT affect the magnetic flux density?

  • The strength of the magnetic field
  • The orientation of the field lines
  • The area through which the field lines pass (correct)
  • The distance from the magnetic source

Which statement about magnetic flux density is false?

<p>It is always uniform across all areas (A)</p> Signup and view all the answers

How is magnetic flux density typically represented in scientific notation?

<p>B (D)</p> Signup and view all the answers

What is the direction of magnetic field lines inside a magnet?

<p>From the south pole to the north pole (C)</p> Signup and view all the answers

What does magnetic flux (Φm) measure?

<p>The total magnetic field passing through a given area (C)</p> Signup and view all the answers

Which of the following statements about magnetic field lines is true?

<p>They always exit from the north pole and enter the south pole. (B)</p> Signup and view all the answers

Which of the following best describes magnetic flux?

<p>The quantity of magnetic field passing through a certain area (B)</p> Signup and view all the answers

When considering magnetic field lines outside a magnet, which statement is correct?

<p>They form closed loops and return to the south pole. (D)</p> Signup and view all the answers

Flashcards

Magnetic Field Lines Inside a Magnet

The direction of magnetic field lines inside a magnet goes from its south pole to its north pole.

Magnetic Flux

Magnetic flux (Φm) quantifies the total magnetic field passing through a given area.

Unit of Magnetic Flux

Magnetic flux is measured in Webers (Wb).

Factors Affecting Magnetic Flux

Magnetic flux is directly proportional to the strength of the magnetic field and the area it passes through.

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Importance of Magnetic Flux

Magnetic flux is a crucial concept in understanding electromagnetic phenomena, like electromagnetic induction and Faraday's law.

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Magnetic Flux Density (B)

The measure of the strength and direction of magnetic field lines passing through a specific area.

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Magnetic Flux (Φm)

The total amount of magnetic field lines passing through a given area.

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What does Magnetic Flux tell us?

It describes the number of magnetic field lines passing through a given area.

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Is Magnetic Flux Density a vector?

Magnetic flux density is a vector quantity, meaning it has both magnitude (strength) and direction.

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What is the unit of Magnetic Flux?

The unit of magnetic flux.

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Study Notes

Student Guide: Physics Year 2 (STEM)

  • This document is a student guide for Physics Year 2 (STEM)
  • Prepared by Saeed Mohamed Ali
  • Revised by Dr. Aziza Ragab Khalifa

Contents

  • Unit 1: Magnetic Effect of Electric Current (pages 5-16)
  • Unit 2: Electromagnetic Induction (pages 17-29)

Unit 1: Magnetic Effect of Electric Current

  • Competencies:
    • Explain magnetic fields due to current passing through a conductor, and magnetic force and torque
  • Skills (Be Able To):
    • Define magnetic fields
    • Calculate magnetic field density and direction
    • Calculate magnetic force and torque on current-carrying wires in magnetic fields
  • Knowledges (Topic Key Facts):
    • Meaning of magnetic field
    • Magnetic field due to current passing through a straight conductor.
    • Magnetic field at the center of a circular coil,
    • Magnetic field at the center of a solenoid.
    • Magnetic force acting on current carrying wire in magnetic field
    • Magnetic torque acting on current carrying wire in magnetic field

Unit 2: Electromagnetic Induction

  • Competencies:
    • Explain electromagnetic induction and Faraday's Law, Lenz's Law, and related concepts
  • Skills (Be Able To):
    • Define electromagnetic induction, Faraday's Law and Lenz' Law
    • Calculate induced current
    • Identify the factors affecting induced EMF and torque
    • Describe electric generators and transformers
  • Knowledges (Topic Key Facts):
    • Meaning of electromagnetic induction
    • Faraday's law and Lenz's law
    • Mutual and Self-induction
    • Electric Motor
    • Electric Generator
    • Electric Transformer

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Student guide Physics Year 2 (STEM) PDF

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