High School

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If \( C_1 = 40 \, \text{F} \), \( C_2 = 40 \, \text{F} \), \( C_3 = 40 \, \text{F} \), and \( C_4 = 40 \, \text{F} \), determine the equivalent capacitance when connected in series.

A. 40 F
B. 160 F
C. 10 F
D. 5 F

Answer :

Final answer:

The equivalent capacitance of four 40 F capacitors connected in series is 10 F (answer c).

Explanation:

The student's question asks for the equivalent capacitance when four capacitors, each with a capacitance of 40 F, are connected in series. To find the equivalent capacitance of capacitors in series, the reciprocal principle is used, which is represented by the formula:

1/Cs = 1/C1 + 1/C2 + 1/C3 + 1/C4

For capacitors of equal value, you can simplify this to:

1/Cs = 4/C

where C is the capacitance of each individual capacitor. Solving for Cs, the equivalent series capacitance, we get:

Cs = C/4

Giving us:

Cs = 40 F / 4 = 10 F

The correct answer to the student's question is c) 10 F, which is the series equivalent capacitance of the configuration.

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