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Q: Which one of the following is correct as per the requirements of magnetic needle?
  • A. Center of gravity of needle shouled ncessarily be below the pivot
  • B. Needle should not necessarily be straight
  • C. The ends of needle need not necessarily be in the same plane
  • D. Needle should not necessarily be sensitive
Correct Answer: Option A - A compass consist of a small metal needle which is magnetized itself and which is free to turn in any direction. • The compass needle aligns with the earth's magnetic field direction and points north-south. so, the center of gravity of needle should necessarily be below the pivot. Once you know where north is, you can figure out any other direction.
A. A compass consist of a small metal needle which is magnetized itself and which is free to turn in any direction. • The compass needle aligns with the earth's magnetic field direction and points north-south. so, the center of gravity of needle should necessarily be below the pivot. Once you know where north is, you can figure out any other direction.

Explanations:

A compass consist of a small metal needle which is magnetized itself and which is free to turn in any direction. • The compass needle aligns with the earth's magnetic field direction and points north-south. so, the center of gravity of needle should necessarily be below the pivot. Once you know where north is, you can figure out any other direction.