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Least count of screw gauge is defined as...

Least count of screw gauge is defined as.

A

`("distance moved by thimble on main scale")/("number of rotation of thimble")`

B

`("pitch of the screw") /(" number of divisions on circular scale")`

C

`("number of rotation of thimble") /(" number of circular scale divisions")`

D

None of the above.

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • The least count of a screw gauge is defined as

    A
    `"distance moved by thimble on main scale"/"number of rotation of thimble"`
    B
    `"pitch of the screw"/"number of divisions on circular scale"`
    C
    `"number of rotation of thimble"/"number of circular scale divisions"`
    D
    None of the above

  • Assertion : A screw gauge having a smaller value of pitch has greater accuracy. Reason : The least count of screw gauge is directly proportional to the number of divisions on circular scale.

    A
    If both Assertion and Reason are correct and Reason is the correct explaination of Assertion.
    B
    If both Assertion and Reason are correct but Reason is not the correct explaination of Assertion.
    C
    If Assertion is true but Reason is false.
    D
    If Assertion is false but Reason is true.

  • Circular scale divisions of a screw gauge is 50. Five full rotations advances circular scale by 5mm. Statement 1- Least count of screw gauge is 0.001 cm least count = pitch/(total number of divisions)

    A
    statement 1 &2 both are true
    B
    statement 1 & 2 are true and statement-2 is correct explanation of statement 1
    C
    statement-1 is false and statement-2 is true
    D
    statement-2 is true and statement-1 is false

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    When a screw gauge is completely closed, zero of circular scale is 4 division below the reference line of graduation. If least count of screw gauge is 0.001 cm, the zero correction is

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