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Alternating Current Applied to an Inductor

A circuit con...

Question

A circuit consisting of capacitors, DC Voltage source and an amplifier having a voltage gain G = - 5 is shown in the figure. The effective capacitance across the nodes A and B (rounded off
to two decimal places) is ____ $μ F .$

14.86

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Solution

The correct option is A 14.86

$C_{m} = C (1 - A_{v})$
$= 2 \times (1 + 5) = 12 μ F$

Disable Vs,

$C_{A B} = \frac{10 \times 4}{10 + 4} + 12 = 14.86 μ F$

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