Home
SELF STUDY
BrowsePracticeTestsSyllabusDoubts & solutionsFree live classesOther courses

Sci & Tech - NCERT Summary

Quick practice

Question 1 of 3

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

A

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

B

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

C

None of the statements is correct

D

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

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