12th chapter 1 quiz Post author:Priyank Pravasi Post published:June 24, 2020 Post category:12th Post comments:0 Comments /10 0 votes, 0 avg 19 Electric Charges and fields ( MCQ's Test ) 1 / 10 Two charges of equal magnitudes kept at a distance r exert a force F on each other. If the charges are halved and distance between them is doubled, then the new force acting on each charge is F/16 F/8 F/4 4F 2 / 10 A charge Q is divided into two parts of q and Q – q. If the coulomb repulsion between them when they are separated is to be maximum, the ratio of Q/q should be 2:1 4:1 1/2 1/4 3 / 10 Electric field at a point varies as r° for a point charge a line charge of infinite length an electric dipole a plane infinite sheet of charge 4 / 10 In general, metallic ropes are suspended on the carriers taking inflammable materials. The reason is to keep the body of the carrier in contact with the earth. none of these. to control the speed of the carrier. to keep the centre of gravity of the carrier nearer to the earth. 5 / 10 Which of the following statement is correct? The electric field at a point is discontinuous if there is a charge at that point always continuous. discontinuous only if there is a negative charge at that point. continuous if there is a charge at that point. 6 / 10 Two similar spheres having +Q and -Q charges are kept at a certain distance. F force acts between the two. If at the middle of two spheres, another similar sphere having +Q charge is kept, then it experiences a force in magnitude and direction as 4F towards +Q charge zero having no direction. 8F towards +Q charge. 8F towards -Q charge 7 / 10 The electric field inside a spherical shell of uniform surface charge density is none of the these directly proportional to the distance from the centre. zero. constant, less than zero. 8 / 10 When a glass rod is rubbed with silk, it gains protons from silk. gains electrons from silk. gives electrons to silk. gives protons to silk. 9 / 10 The magnitude of electric field intensity E is such that, an electron placed in it would experience an electrical force equal to its weight is given by mg/e mge e/mg e²g/m² 10 / 10 The electric field intensity due to an infinite cylinder of radius R and having charge q per unit length at a distance rir r(r > R) from its axis is directly proportional to r3. directly proportional to r² inversely proportional to r² inversely proportional to r Your score is The average score is 48% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Tags: 12th physics, online quiz, physics world, priyank sir Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Read more articles Previous PostSolar cell Next PostDipole And dipole Moment (video) You Might Also Like P-N junction diode June 23, 2020 Self – induction June 21, 2020 Magnetic field intensity due to bar magnet June 21, 2020 Leave a Reply Cancel replyYou must be logged in to post a comment.