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Magnetism and Electromagnetism problems


  • 1. Electronics Magnetism and Electromagnetism: When the south pol
    When the south poles of two bar magnets are brought close together, there will be a force of attraction.

  • Options
  • A. True
  • B. False
  • Discuss
  • 2. The operation of an electrical generator relies on electromagnetic induction.

  • Options
  • A. True
  • B. False
  • Discuss
  • 3. Magnetic flux flows from the north pole to the south pole within the magnet.

  • Options
  • A. True
  • B. False
  • Discuss
  • 4. A voltage is induced across a conductor if it remains absolutely stationary within a magnetic field.

  • Options
  • A. True
  • B. False
  • Discuss
  • 5. The induced emf of a conductor cutting flux lines is directly proportional to the rate of cutting.

  • Options
  • A. True
  • B. False
  • Discuss
  • 6. The magnetic field, current through the Hall element, and Hall voltage are all at right angles to each other.

  • Options
  • A. True
  • B. False
  • Discuss
  • 7. A magnetic material such as iron can change the course of magnetic lines of force.

  • Options
  • A. True
  • B. False
  • Discuss
  • 8. The unit of magnetic flux density is the weber.

  • Options
  • A. True
  • B. False
  • Discuss
  • 9. The Hall voltage is the voltage created by a conductor moving through a magnetic field.

  • Options
  • A. True
  • B. False
  • Discuss
  • 10. The ability of a material to maintain a magnetized state (without the presence of a magnetizing force) is called retentivity.

  • Options
  • A. True
  • B. False
  • Discuss

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