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प्रश्न
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उत्तर
The following procedure is used to measure the diameter of a wire
(a). Calculate the least count and zero error of the screw gauge.
(b). Place the wire in between the studs. Turn the ratchet clockwise so as to hold the wire gently in between the studs. Record the main scale reading.
(c). Now record the division of circular scale that coincides with the base line of the main scale. This circular scale division multiplied by the least count will give circular scale reading.
(d). The observed diameter is obtained by adding the circular scale reading to the main scale reading. Subtract the zero error if any, with its proper sign, from the observed diameter to get the true diameter.
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संबंधित प्रश्न
The size of bacteria is 1 µ. Find the number of bacteria present in 1 m length.
Name the part of the vernier callipers which is used to measure the following
External diameter of a tube
Explain the terms : Pitch .
How are they determined?
Fig., below shows the reading obtained while measuring the diameter of a wire with a screw gauge. The screw advances by 1 division on the main scale when circular head is rotated once.
Find:
(i) Pitch of the screw gauge,
(ii) Least count of the screw gauge and
(iii) The diameter of the wire.
State the formula for determining least count for a vernier callipers.
State the correction if the positive error is 7 divisions when the least count is 0.01 cm.
What do you understand by the term least count of screw?
State whether the following statement is true or false by writing T/F against it.
The least count of a screw gauge can be lowered by increasing the number of divisions on its thimble.
