A closed surface contains two equal and opposite charges. The net electric flux from the surface will be________________?

Related Mcqs:

1. “The total electric flux through any closed surface surrounding charges is equal to the amount oflcharge enclosed”. The above statement is associated with____________?

   A. Coulomb’s square law
   B. Gauss’s law
   C. Maxwell’s first law
   D. Maxwell’s second law

2. “The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface”. The above statement is associated with_______?

   A. Gauss’s law
   B. Kirchhoff s law
   C. Faraday’s law
   D. Lenz’s law

3. The force between two charges is 120 N. If the distance between the charges is doubled, the force will be________________?

   A. 60 N
   B. 30 N
   C. 40 N
   D. 15 N

4. Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will_______________?

   A. decrease
   B. increase
   C. remain constant
   D. depends upon composition of dielectric

5. Electric flux linked with a surface will be maximum when____________?

   A. The surface is held parallel to the electric field
   B. The surface is held perpendicular to the electric field
   C. The surface makes an angle of 45°with the field
   D. All of the above

6. The number of Faraday tubes of flux passing through a surface in an electric field is called____________?

   A. electric flux
   B. electric flux density
   C. magnetic flux density
   D. electric charge density

7. Electric intensity at any point in an electric field is equal to the at that point?

   A. electric flux
   B. magnetic flux density
   C. potential gradient
   D. none of the above

8. If a third equal and similar charge is placed between two equal and similar charges, then this third charge will_____________?

   A. move out of the field of influence of the two charges
   B. remain in stable equilibrium
   C. not be in equilibrium
   D. be in unstable equilibrium

9. Electric flux due to a point charge +q is______________?

   A. 1/4IIɛ q/r
   B. q/ɛ0
   C. 1/4IIɛ0. q/r2
   D. 4IIɛ0

10. An electric current induced within the body of a conductor when that conductor either moves through a non uniform magnetic field or in a region where there is a change in magnetic flux is called_____________?

    A. Induced current
    B. Eddy current
    C. Back emf
    D. None of the above