Q16 of 94 Page 166

Find the equivalent capacitances of the system shown in figure between the points a and b.


C1 and C2 are in series Equivalent capacitance,




The capacitance Ca, Cb and C3 are connected in parallel combination across each other



Putting the values in the above equation, we get





Equalent capacitance between a and b is


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It is required to construct a 10 μF capacitor which can be connected across a 200V battery. Capacitors of capacitance 10 μF are available, but they can withstand the only 50V. Design a combination which can yield the desired result.

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Take the potential of the point B in figure to be zero.

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b) If a capacitor is connected between C and D, what charge will appear on this capacitor?



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A cylindrical capacitor is constructed using two coaxial cylinders of the same length 10 cm and of radii 2 mm and 4 mm.

a) Calculate the capacitance.


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