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  4. All six capacitors shown are identical. Each can withstand maximum 200 volts between its terminals. The maximum voltage that can be safely applied between A and B is

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Q. All six capacitors shown are identical. Each can withstand maximum 200 volts between its terminals. The maximum voltage that can be safely applied between $A$ and $B$ isPhysics Question Image

Electrostatic Potential and Capacitance

Solution:

Given circuit can be reduced as follows
image
$(C=$ capacitance of each capacitor $)$
The capacitors $(3 C,\, 3 C)$ shown in figure can withstand maximum $200\, V$ individually.
$\therefore $ So maximum voltage that can be applied across $A$ and $B$ is equally shared. Hence, maximum voltage applied across $A$ and $B$ will be $(200+200)=400$ volt.