Question Thickness of a pencil measured by using a screw gauge (least count 0.001 cm ) comes out to be 0.802 cm. The percentage error in the measurement is A 0.125% B 2.43% C 4.12% D 2.14% Medium Solution Verified by Toppr Correct option is A) Given, Thickness (t)= 0.802cm Least count= 0.001 cm now error in measuring t= (0.802±0.001)

The Theory. The screw gauge is an instrument used for measuring accurately the diameter of a thin wire or the thickness of a sheet of metal. It consists of a U-shaped frame fitted with a screwed spindle which is attached to a thimble. Parallel to the axis of the thimble, a scale graduated in mm is engraved.

The number of divisions on the head scale of a screw gauge of least count 0.01 mm with a pitch of 1.2 mm is 120.

A screw gauge gives the following reading when used to measure the diameter of a wire. Main scale reading=6mm. Circular scale reading=64 divisions. Given that 1 mm on main scale corresponds to 100 divisions of circular scale.What is the diameter of wire? | Socratic

Solution Verified by Toppr Correct option is B) Screw gauge is a more accurate measuring instrument than the vernier caliper. The least count of screw gauge is equal to the ratio of pitch of the screw to the number of the division on circular scale. For example: Pitch of the screw =1 mm Number of circular scale division =100

The ratchet in the micrometer (screw gauge) is a small mechanism inside the screw nut drum, with the purpose of limiting the measuring force of the spindle screw. It works by a calibrated small drum that limits the friction force applied to the measure work piece and produces a ratchet sound when the thimble is locked.

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A screw gauge gives the following reading when used to measure the diameter of a wire. Main scale reading : 0 mm Circular scale reading: 52 division Given that 1 mm on the main scale corresponds to 100 divisions of the circular scale.

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