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Physics

Two spherical conductors A and B of radii a and b (b > a) are placed concentrically in air. A is given a charge +Q while B is earthed. Then the equivalent capacitance of the system is:

\(4 \pi \varepsilon_0\left(\frac{a b}{b-a}\right)\)

\(4 \pi \varepsilon_0(a+b)\)

\(4 \pi \varepsilon_0\left(\frac{b^2}{b-a}\right)\)

4πε0b

रेडियस a और b (b > a) वाले दो स्फेरिकल कंडक्टर A और B को हवा में कॉन्सेंट्रिकली रखा गया है। A को +Q चार्ज दिया गया है जबकि B को अर्थ किया गया है। तो सिस्टम की इक्विवेलेंट कैपेसिटेंस है:

\(4 \pi \varepsilon_0\left(\frac{a b}{b-a}\right)\)

\(4 \pi \varepsilon_0(a+b)\)

\(4 \pi \varepsilon_0\left(\frac{b^2}{b-a}\right)\)

4πε0b

View Answer & Solution
Correct Answer: A (\(4 \pi \varepsilon_0\left(\frac{a b}{b-a}\right)\))
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