Physics – Magnetism, Magnetic Fields and Forces

1. What is the relationship between magnetic field and distance in a simple conductor?

  1. The strength increases as we move away from it
  2. Distance has no effect on a conductor’s magnetic field
  3. There is an inverse square relationship between them
  4. The strength decreases as distance increases from it
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Answer: Option D. The strength decreases as distance increases from it

2. Which statement regarding magnetic fields is correct?

  1. Magnetic fields can only be created by natural magnets
  2. Magnetic fields do not affect charged particles
  3. Magnetic fields are generated by moving electric charges
  4. Magnetic fields are visible to the naked eye
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Answer: Option C. Magnetic fields are generated by moving electric charges

3. What is the direction of force as per Fleming’s left-hand rule?

  1. In line with both current and magnetic field
  2. The opposite direction of the current
  3. Along with the direction of the current
  4. Perpendicular to both current and magnetic field
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Answer: Option D. Perpendicular to both current and magnetic field

4. Which of the following statements correctly describes magnetic field lines?

  1. They never intersect with each other
  2. They always run from South to North outside the magnet
  3. Their density is uniform throughout, indicating that the strength of the magnetic field is the same at all points.
  4. They often cross each other
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Answer: Option A. They never intersect with each other

5. What is the direction of the magnetic field within a magnet?

  1. From its North Pole to its South Pole
  2. From its South pole to its North pole
  3. It has no specific direction inside a magnet
  4. It runs perpendicular to the axis of the magnet
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Answer: Option B. From its South pole to its North pole