Advertisements
Advertisements
प्रश्न
What is backlash error? Why is it caused? How is it avoided?
उत्तर
Backlash error: If by reversing the direction of rotation of the thimble, the tip of the screw does not start moving in the opposite direction immediately but remains stationary for a part of rotation; it is called backlash error.
Reason: It happens due to wear and tear of the screw threads.
To avoid the backlash error, while taking the measurements the screw should be rotated in one direction only. If the direction of rotation of the screw needs to be changed, then it should be stopped for a while and then rotated in the reverse direction.
APPEARS IN
संबंधित प्रश्न
Define a fundamental quantity.
Complete the rollowing:
1 micron= ____ Å
Mohana bought 2 kg 600 g grapes and 1 kg 450 g guavas. How much more did Mohana buy grapes than guavas, by weight?
The distance between Delhi and Chennai can be measured in ______.
5 km = ______ m.
One cubic metre is equal to ______ cubic centimetre.
Arrange the following in correct sequence.
1L, 100 cc, 10 L, 10 cc
Hold a sheet paper in one hand and a book in one hand. Which hand feels heavy? Why?
Questions based on Higher Order Thinking Skills:
|
There are three spheres A, B, C as shown below. Sphere A and B are made of same material. Sphere C is made of a different material. Spheres A and C have equal radii. The radius of sphere B is half that of A. Density of A is double that of C. |
Now answer the following questions.
- Find the ratio of masses of spheres A and B.
- Find the ratio of volumes of spheres A and B.
- Find the ratio of masses of spheres A and C.
