Question

An infinite ladder of capacitors each 1mF is made as shown in the figure. The capacitance between A and B (in mF) is–

• A. 1
• B. 1.3
• C. 1.6
• D. Zero

Answer 1

Answer: (C)

1.6

Answer 2

Use shortcut method

First two blocks

C_Approx = $\frac { 3 } { 2 }$= 1.5 mF

\ C_eq is slightly more than 1.5 mF

So 1.6 mF is correct answer.