Question

The electrical resistance of a mercury column in a cylindrical container is r .The mercury is poured into another cylindrical container with half the radius of cross section.The resistance of the mercury column is

Answer 1

Thank you for asking this question. The options for this question are missing, here are the missing options:

1) R/2

2) R/8

3) R/4

4) R/16

The correct answer for this question is R/16

If there is any confusion please leave a comment below.

Answer 2

Answer: 16r

Explanation:

We know that volume is constant.

Therefore equate the volume with radius r and with radius r/2 .we get the new height of the Columbia,that is 4times initial.put the values in formula for resistance and you get the answer that is 16 times of initial.