Electric flux and gauss's law

The electric field lines passing through a surface area are called

• Electric Field

• Electric Flux

• Electric Charge

• Electric Lines

“The total electric flux through any closed surface is equal to the total (net) electric charge enclosed by the surface, divided by ∈₀”

• Faraday's Law

• Coulomb's Law

• Gauss's Law

• Volt's Law

• a

• b

• c

• d

• e

A hollow metal sphere is given a positive charge. Under electrostatic conditions, which of the following is TRUE of the electric field just inside the surface of the sphere?

• The electric field is directed away from the center of the sphere.

• The electric field in infinitely large.

• The electric field is zero.

• The electric field depends on the radius of the sphere.

Which of the following must be true for a Gaussian surface through which the net flux is zero?

1. There are no charges inside the surface.

2. The net charge enclosed by the surface is zero.

3. The electric field is zero everywhere on the surface.

• I only

• I and II only

• III only

• All are true

A positive charge is enclosed by a spherical surface. What direction is the electric field lines relative to the surface?

• tangent

• from the inside to the outside of the surface

• from the outside to the inside of the surface

• the lines do not pass through the surface

A charge of magnitude 'q' is at the center of a sphere of radius r. What is the electric field intensity at the surface of the sphere? r = 0.53 m, q = 5.0 x 10^-6 C

• 6.5 x 10^5 Nm*m/C

• 5.6 x 10^5 Nm*m/C

• 1.6 x 10^5 Nm*m/C

• 1.3 x 10^6 Nm*m/C

What is the S.I unit of Electric Flux?

• Nm²/C

• Nm²

• N²m²/C

• Nm/C²

Figure shows the electric lines of force emerging from a charged body. If the electric field at A and B are E_A and E_B respectively and if the displacement between A and B is r then

• E_A > E_B

• E_{A <} E_B

• E_{A =} E_B

• E_{A =} E_B / r²

Define electric field strength?

• rate of flow of charges

• force per unit positive test charge

• potential difference per unit separation between plates

• product of force and charge