First slide

Capacitance

Question

The effective capacitance in $μ$ F in between A and B will be

Moderate

A

28/9
B

4
C

5
D

18

Solution

2 $μ$ F , 2 $μ$ F parallel $\Rightarrow$ 2 + 2 = 4 $μ$ F
4 $μ$ F , 12 $μ$ F in series $\Rightarrow$ $\frac{4 \times 12}{16} = 3 μF$
3 $μ$ F , 2 $μ$ F in parallel $\Rightarrow$ 3 + 2 = 5 $μ$ F .

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