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  • Can someone explain A student measured the diameter of a wire using a screw gauge with least count 0.001 cm and listed the measurements. The correct measurement is

A student measured the diameter of a wire using a screw gauge with least count 0.001 cm and listed the measurements. The correct measurement is 
 

  • Option 1)

    5.3 cm

  • Option 2)

    5.32 cm

  • Option 3)

    5.320 cm

  • Option 4)

    5.3200 cm

 

Answers (1)

best_answer

As we learnt in 

Significant figures -

The figures of a number that express a magnitude to a specified degree of accuracy

-

 

The least count of screwgauge is smallest length which can be measured accuretly with it. At least count 0.001 cm=\frac{1}{1000}cm

Hence measured value should be recorded up to 3 decimal i.e 5.320 cm


Option 1)

5.3 cm

Option is incorrect

Option 2)

5.32 cm

Option is incorrect

Option 3)

5.320 cm

Option is correct

Option 4)

5.3200 cm

Option is incorrect

Posted by

Plabita

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