Electrostats

Consider a horizontal charged disk with center OO and having surface charge density σ\sigma, and radius RR, Consider a vertical rectangle of dimensions 2a×2h2a \times 2h, which cuts the disk at a distance aa from its center, such that half of rectangle lies below the disk and half of it lies above the disk.Use a<<Ra << R to find the value of flux of electric field in Nm2C1 N m^2 C^{-1} through the rectangle to the nearest integer. The top view is shown below:

Details and assumptions

σ=1.05×104Cm2\sigma = 1.05 \times 10^{-4} Cm^{-2}

R=3m R = 3m

a=2mm a = 2 mm

h=1m h = 1m

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