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प्रश्न
Define the term pitch.
What do you understand by the term pitch of screw?
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उत्तर
“The pitch of a screw is the distance moved by the screw in one complete rotation of its head.”
OR
Pitch may also be defined as “the distance between two consecutive threads of screw measured along the axis of the screw.”
Pitch = `"Distance moved by thimble on M.S."/"Number of rotations of thimble"`
संबंधित प्रश्न
Draw a neat and labelled diagram of a screw gauge.
Name its main parts and state their functions.
Why is the metre length in terms of the wavelength of light considered more accurate?
(a) A vernier scale has 20 divisions. It slides over the main scale, whose pitch is 0.5 mm. If the number of divisions on the left hand of the zero of vernier on the main scale is 38 and the 18th vernier scale division coincides with the main scale, calculate the diameter of the sphere, held in the jaws of vernier callipers.
(b) If the vernier has a negative error of 0.04 cm, calculate the corrected radius of the sphere.
State the correction if the positive error is 7 divisions when the least count is 0.01 cm.
The thimble of a screw gauge has 50 divisions for one rotation. The spindle advances 1 mm when the screw is turned through two rotations.
- What is the pitch of the screw?
- What is the least count of screw gauge?
- When the screw gauge is used to measure the diameter of wire the reading on the sleeve is found to be 0.5 mm and reading on thimble is found, 27 divisions. What is the diameter of the wire in centimetres?
How do you account for positive zero error for calculating the correct diameter of wires?
State whether the following statement is true or false by writing T/F against it.
A metre scale can measure a length of 6.346 cm.
What is the least count in the case of the following instrument?
Spring balance
