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Question

A magnet in the form of a cube is placed on a piece of cork that floats on water. The cube is marked with four faces  W, X, Y and Z and the compass needle points in the direction as shown in the figure.

Which of the following options correctly denote the North and South pole of the magnet?
  1. North - pole (W)
    South - pole (X)
  2. North- pole (X)
    South - pole (Y)
  3. North - pole (Y)
    South - pole (Z)
  4. North - pole (Z)
    South - pole (W)


Solution

The correct option is C North - pole (Y)
South - pole (Z)
A compass has a magnetic needle that works as a pointer to magnetic north of the earth because the magnetized needle aligns itself with the lines of the earth's magnetic field. Thus, we can say that, in the given case, Y denotes North pole as it faces the North pole of the compass needle. Similarly, Z denotes South pole of the magnet.

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