Question

The sum of squares of for small circles of equal radius is equal to the circumference of a bigger circle find the ratio of area be bigger circle to that the smaller circle

Answer 1

Molar conductivity of a solution at a given concentration is the conductance of volume V of a solution containing 1 mole of the electrolyte kept between two electrodes with the area of cross-sectionAand distance of unit length. If temp. Increases , k of electrolyte Sol. Increases because mobility of ions increases.

Answer 2

Four small circle having radius=r

bigger circles radius is=R

Circumference of circle is =2×π×r

4×2πr=2πR

R=4r

Area=area of bigger circle/area of small circle

Area=π×R×R/π×r×r

Area=(R/r)^2(put value of R in given )

=4×4

=16