When some compass needles are placed on a card board along a circle with the centre at the wire, they will?

  1. Point in the direction of S-E
  2. Point in the direction of E-W
  3. Set themselves tangential to the circle
  4. Point in the direction of N-S
    Right Answer: Point in the direction of N-S

December 16, 2017   Asghar Khan    Physics  
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