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Lab Experiment for Wheatstone Bridge Trainer Module




To find a Unknown value of resistance using a Wheatstone bridge


  • Trainer kit
  • Decade resistance Box
  • Patch chords
  • Multimeter




  • Connections are made as per the connection diagram.
  • Connect the decade resistance box at Rx terminal (or) Connect resistance to be measured at Rx terminals.
  • No switch ON the unit and vary the resistance R1and R3 to get the nearest point of balance.
  • Now vary the R2 to get exact point of balance.
  • Switch off the unit and remove the patching at R2.
  • Now measure the resistance at R2 by using multimeter.
  • Tabulate the reading and find the value of unknown resistance.