Question

The sides of a rectangular block are 2cm, 3cm and 4cm. The
ratio of maximum to minimum resistance between parallel
planes is​

Answer 1

Answer: We know, R = P whole 1/a

So, resistance between parallel sides of length 3cm and 2cm is -

R1 = p × 4 / 6 = 2p / 3

now of length 4cm and 3cm-

R2 = p × 2 /12 = p / 6

now of length 4cm and 2cm -

R3= p × 3 /8 = 3p /8

Required ratio = R1/ R2 = 2p / 3 / p / 6 = 4/1