Three infinitely long charge sheets are placed as shown in figure. The electric field at point P is

• 2σε0k

• -2σε0k

• 4σε0k

• -4σε0k

An electric dipole consists of two opposite charges, each of magnitude 1.0μC separated by a distance of 2.0 cm. The dipole is placed in an external electric field of 105NC-1. The maximum torque on the dipole is

• 0.2×10-3 N m

• 1×10-3 N m

• 2×10-3 N m

• 4×10-3 N m

A ring of radius R carries a charge Q, uniformly distributed along its circumference. What is the ratio of the electric field strength at a distance R to that at a distance R2 along the axis?

• 38

• 338

• 3342

• 2233

An infinitely long thin straight wire has uniform linear charge density of 13Cm-1. Then the magnitude of the electric intensity at a point 18 cm away is

• 0.33×1011 NC-1

• 0.66×1011 NC-1

• 3×1011NC-1

• 1.32×1011 NC-1

Two point charges are 3 m apart and their combined charge is 8μC. The force of repulsion between them is 0.012 N. Charges are

• 4μC,4μC

• 6μC,2μC

• 5μC,3μC

• 7μC,1μC

A charge Q is enclosed by a Gaussian spherical surface of radius R. If the radius is doubled, then the outward electric flux will

• increase four times

• be reduced to half

• remain the same

• be doubled

The direction of electric field intensity (E) at a point on the equatorial line of an electric dipole of dipole moment (p) is

• along the equatorial line towards the dipole

• along the equatorial line away from the dipole

• perpendicular to equatorial line,opposite to (p)

• perpendicular to the equatorial line and parallel to (p)

What is the electric flux linked with closed surface?

• 1011 N m2C-1

• 1012 N m2C-1

• 1010 N m2C-1

• 8.86×1013 Nm2C-1

Which of the following figures cannot possibly represent electrostatic field lines?

Given below are two statements: Statement I: A point charge is brought in an electric field. At a point near to the charge may increase if the charge is positive. Statement II: An electric dipole is placed in a nonuniform electric field. The net electric force on the dipole will not be zero. Considering above statements choose the most appropriate answer from the options given below.

• Both Statement I and Statement II are correct.

• Both Statement I and Statement II are incorrect.

• Statement I is correct, Statement II is incorrect.

• Statement I is incorrect, Statement II is correct.