Questions from Modern Physics

Q: You measure an electric field of 1.25 × 106 N

You measure an electric field of 1.25 × 106 N/C at a distance of 0.150 m from a point charge. There is no other source of electric field in the region other than this point charge. (a). What is the e...

Q: It was shown in Example 21.10 (Section 21.

It was shown in Example 21.10 (Section 21.5) that the electric field due to an infinite line of charge is perpendicular to the line and has magnitude E = λ /2

Q: A hemispherical surface with radius r in a region of uniform electric

A hemispherical surface with radius r in a region of uniform electric field

Q: As discussed in Section 22.5, human nerve cells have

As discussed in Section 22.5, human nerve cells have a net negative charge and the material in the interior of the cell is a good conductor. If a cell has a net charge of -8.65 pC, what are the magnit...

Q: The three small spheres shown in Fig. E22.8 carry

The three small spheres shown in Fig. E22.8 carry charges q1 = 4.00 nC, q2 = -7.80 nC, and q3 = 2.40 nC. Find the net electric flux through each of the following closed surfaces shown in cross section...

Q: A charged paint is spread in a very thin uniform layer over

A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 12.0 cm, giving it a charge of -49.0 µC. Find the electric field (a). just inside the paint lay...

Q: A point charge q1 = 4.00 nC is located on

A point charge q1 = 4.00 nC is located on the x-axis at x = 2.00 m, and a second point charge q2 = -6.00 nC is on the y-axis at y = 1.00 m. What is the total electric flux due to these two point charg...

Q: A 6.20-µC point charge is at the center

A 6.20-µC point charge is at the center of a cube with sides of length 0.500 m. (a). What is the electric flux through one of the six faces of the cube? (b). How would your answer to part (a) change...

Q: Two very long uniform lines of charge are parallel and are separated

Two very long uniform lines of charge are parallel and are separated by 0.300 m. Each line of charge has charge per unit length +5.20 µC/m. What magnitude of force does one line of charge exert on a 0...

Q: A spherical Gaussian surface encloses a point charge q. If the

A spherical Gaussian surface encloses a point charge q. If the point charge is moved from the center of the sphere to a point away from the center, does the electric field at a point on the surface ch...