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  1. A bar magnet of moment M and pole strength m is cut into parts of equal lengths.
  2. A sound absorber attenuates the sound level by 20 dB. The intensity decreases
  3. Potentiometer measures the potential difference more accurately than a voltmeter
  4. The order of distance of an electron revolving in an atom from nucleus is
  5. The distance travelled by an object along a straight line in time t is given by