Quiz 2 - W6

The no. of lines/area is directly proportional to the magnitude of electric field

• True

• False

The no. of electric lines piercing through an area is called electric flux

• True

• False

Electric Flux is a scalar quantity. Its units are

• N.m²/C

• N/C

• N.C²/m

• N.m².C

Consider a uniform electric field passing through a flat surface of area A. The flux will be maximum when the angle between the electric field and the area vector is:

• 45^o

• 90^o

• 0^o

• 180^o

If the electric field is parallel to the given surface, the electric flux through the surface will be

• Maximum

• Minimum, but not zero

• Zero

• Cannot be determent

The electric flux is a vector quantity.

• True
• False

A point charge q is placed at the center of a sphere. The electric flux through the sphere is:

• Zero

A charge q is enclosed by a spherical Gaussian surface of radius r. If the radius of the Gaussian surface is doubled, the electric flux through the surface will:

• Doubled

• Halved

• Quadrupled

• Remains the same

Consider a closed Gaussian surface enclosing a net positive charge Q. Which of the following statements are necessarily true?

• The electric field at every point on the Gaussian surface is directed radially inward.

• The electric flux through the Gaussian surface is positive.

• The electric field has the same magnitude at every point on the Gaussian surface.

• If the shape of the Gaussian surface is changed, the total electric flux through it will also change.

Gauss's law states that the total electric flux through any closed surface is equal to:

• The electric field enclosed by the surface.

• 1/ϵ_o​ times the total charge enclosed by the surface.

• The charge density within the surface.

• ϵ_o​ times the total charge enclosed by the surface.