Assertion (A): The electric field inside a conductor in electrostatic equilibrium is zero.Reason (R): Charges inside a conductor move to the surface to minimize potential energy.a) Both A and R are true, and R is the correct explanation of A.b) Both A and R are true, but R is not the correct explanation of A.c) A is true, but R is false.d) A is false, but R is true.

Given below are two statements.Statement I: Electric potential is constant within and at the surface of each conductor.Statement II: Electric field just outside a charged conductor is perpendicular to the surface of the conductor at every point.In the light of the above statements, choose the most appropriate answer from the options given below.

Assertion (A): Dielectric materials are insulators.Reason (R): Dielectric materials do not allow free movement of charges.a) Both A and R are true, and R is the correct explanation of A.b) Both A and R are true, but R is not the correct explanation of A.c) A is true, but R is false.d) A is false, but R is true.

A metallic solid sphere of radius R is given the charge Q. Which of the followingstatement is true then(a) Electric field at points 0< r < R is zero(b) Charge Q is on the outer surface of the sphere(c) Electric field at r>R is given by Q/4πε0r2(d) Electric field is perpendicular to the surface of the sphere

A cube of a metal is given a positive charge Q. For this system, which of the following statements is true?Electric potential at the surface of the cube is zeroElectric potential within the cube is zeroElectric field is normal to the surface of the cubeElectric field varies within the cube

a) Both A and R are true and R is the correct explanation of Ab) Both A and R are true but R is NOT the correct explanation of A c) A is true but R is falsed) A is false and R is also false1. Assertion (A): The electrostatics force increases with decrease the distance between thecharges.Reason (R): The electrostatic force of attraction or repulsion between any two stationarypoint charges is inversely proportional to the square of the distance between them.2. Assertion (A): The Coulomb force between two points charges depend upon the dielectricconstant of the intervening medium.Reason(R): Coulomb’s force varies inversely with the dielectric constant of medium.3. Assertion(A): The charge given to a metallic sphere does not depend on whether it is hollowor solidReason(R): The charge resides only at the surface of conductor.4. Assertion (A): A comb run through one’s dry hair attracts small bits of paper.Reason(R): Molecules in the paper gets polarized by the charged comb resulting in net force ofattraction5. Assertion (A): A proton is placed in a uniform electric field, it tend to move along thedirection of electric field.Reason(R): A proton is placed in a uniform electric field it experiences a force.6. Assertion (A): Electric field at the surface of a charged conductor is always normal to thesurface at every point.Reason(R): Electric field gives the magnitude & direction of electric force ( ) experienced by anycharge placed at any point.