2. (5%) Four capacitance C1=1(μF), C2=2(μF), C3=3(μF), C4=4(μF), are connected as following figure. The total equivalent capacitance is (A) 5.5 (μF) (B) 10 (μF) (C) 1.9 (μF) (D) none of the mentioned

1. (5%) A cylindrical capacitor consists of an inner conductor of radius a, and an outer conductor whose inner radius is b. The space between the conductors is filled with a dielectric of permittivity ε. The length of the capacitor is L. The capacitance of this this capacitor is (A) C=2πεL/ln(b/a) (B) C=2πεL/In(a/b)(C)C=2πεL/In(ab) (D) none of the mentioned

2. (5%) Four capacitance C₁=1(μF), C₂=2(μF), C₃=3(μF), C₄=4(μF), are connected as following figure. The total equivalent capacitance is

(A) 5.5 (μF)
(B) 10 (μF)
(C) 1.9 (μF)
(D) none of the mentioned

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