Home
SELF STUDY
BrowsePracticeTestsPlaylistDoubts & solutionsFree live classesOther courses

Sci & Tech - NCERT Summary

Quick practice

Question 1 of 5

Ball bearings are used in bicycles, cars, etc., because__: 

A

The actual area of contact between the wheel and axle is increased

B

None of the statements is correct

C

The effective area of contact between the wheel and axle is increased

D

The effective area of contact between the wheel and axle is reduced 

Concepts

Get unlimited practice with UPSC CSE - GS subscription

pick

Boost your performance with adaptive practice tests

pick

Practice every concept in the syllabus

pick

Compare your speed and accuracy with your peers

pick

Download the app and practice on the go