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An uncharged nonconductive hollow sphere of radius 17 cm surrounds a 14 µC charge located at the origin of a cartesian coordinate system. A drill with a radius of 1.00 mm is aligned along the z axis, and a hole is drilled in the sphere. Calculate the electric flux through the hole. (units of N m2/C)

Question

An uncharged nonconductive hollow sphere of radius 17 cm surrounds a 14 µC charge located at the origin of a cartesian coordinate system. A drill with a radius of 1.00 mm is aligned along the z axis, and a hole is drilled in the sphere. Calculate the electric flux through the hole. (units of N m2/C)

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Solution

The electric flux through a closed surface surrounding a charge is given by Gauss's Law, which states that the electric flux through a closed surface is equal to the total charge enclosed divided by the permittivity of free space (ε₀). The total charge enclosed by the sphere is 14 µC, and the permittivity of free space is approximately 8.85 x 10^-12 C²/N·m².

The electric flux (Φ) through the sphere can be calculated using the formula:

Φ = Q / ε₀

Substituting the given values:

Φ = (14 x 10^-6 C) / (8.85 x 10^-12 C²/N·m²) = 1.58 x 10^6 N·m²/C

However, the question asks for the electric flux through the hole drilled in the sphere, not the total flux through the sphere. The flux through the hole will be proportional to the ratio of the area of the hole to the total area of the sphere.

The area of the hole (A_hole) can be calculated using the formula for the area of a circle (πr²), where r is the radius of the hole:

A_hole = π(1 x 10^-3 m)² = 3.14 x 10^-6 m²

The total area of the sphere (A_sphere) can be calculated using the formula for the surface area of a sphere (4πr²), where r is the radius of the sphere:

A_sphere = 4π(0.17 m)² = 0.36 m²

The ratio of the area of the hole to the total area of the sphere is then:

A_hole / A_sphere = (3.14 x 10^-6 m²) / (0.36 m²) = 8.72 x 10^-6

The electric flux through the hole is then this ratio times the total flux through the sphere:

Φ_hole = (8.72 x 10^-6) * (1.58 x 10^6 N·m²/C) = 13.78 N·m²/C

So, the electric flux through the hole is approximately 13.78 N·m²/C.

This problem has been solved

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