1.

A disc of radius a//4having a uniformly distributed charge 6C is placed in X-Y plane with its centre at (-a//2,0,0).A rod of length a carrying a uniformly distributed charge 8C is placed on the X-axis from x = a//4 to x = 6a//4. Two point charges -7 C and 3 C are placed at ((a)/(4) , - (a)/(4) . 0) and (-(3a)/(4) , 0) respectively. Consider a cubical surface formed by six surfaces x = +- (a)/(2) , y = +- (a)/(2), z = +- (a)/(2). The electric flux throgh the cubical surface is

Answer»

`-2 C//in_(0)`
`2 C//in_(0)`
`10 C//in_(0)`
`12 C//in_(0)`

ANSWER :A


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