Electric field and Electric charge -1 Electric field and Electric charge -1 1 / 39 Columbs theorem is E=sigma/£° E=sigma× £° E=£°/sigm E=sigma 2 / 39 The vector of coloumbs law is 1/4π£° q1×q2/r^2 4π£°q1×q2/r^3 1/4π£° (q1×q2) . Vector r /r^3 1/4π£° q1q2/r^3 3 / 39 Which is correct for charge on an electron 1.6× 10^-16 1.6 × 10^-19 1.6× 10^ -18 1.6× 10^-17 4 / 39 The surface charge density is Q/A Q/l Q/V Q. A 5 / 39 The intensity of electric field at a point is Fq F/q q /F Fq/3 6 / 39 Electric field lines provide information about Field strength Directions Nature of charge All of above 7 / 39 The permittivity of free space is 8.85×10^-14 8.85×10^-12 8.85×10^12 8.85×10^11 8 / 39 SI unit of electric dipole moment is Cm m/C CN C/m 9 / 39 What is the angle between the electric dipole moment p and the electric field E when the dipole is in stable equilibrium Π/4 O Π/2 π 10 / 39 A charge Q placed at the center on the line joining two charges Q will be in equilibrium if Q will be equal to Q/2 Q/4 -4Q -Q/4 11 / 39 Van de Graff generator is an electrostatic machine which produces Only high current Only high voltage Both high current and high voltage Both low current and low voltage 12 / 39 SI unit of permittivity is N^-1C^-1m^2 NC^2m2 NC^-2m^2 C^2N^-1m^-2 13 / 39 Quantisation of charge indicates Charge is always conserved Charge can be any value Charge which is a fraction of charge on an electron is not possible Charge can be transformed 14 / 39 The force acting on per unit charge is called Electric field Electric current Electric flux Electric potential 15 / 39 The ratio of electric force and gravitational force acting between two charge is in the order of 10^41 10^39 10^42 1 16 / 39 Which of the following value of n is not possible in relation Q=ne 5 10.2 7 100 17 / 39 The electric dipole moment p is along electric field E. The work done in rotating the dipole by 90° PE 2PE PE/2 PE/3 18 / 39 If E1 the electric field on axial position and E2 the electric field at equatorial position at same distance due to dipole then E1=E2 E1=2E2 2E1=E2 None of these 19 / 39 Two point charge of +3uc and +4uc repel each other with a force of 10N. If each of charge is given additional-6uc, then new force is 2N 5N 4N 7.5N 20 / 39 The dimension formula of electric flux is M^1L^-2T^4A^2 ML^2T^4A^-2 ML^3T^-3A^-1 None of these 21 / 39 The si unit of electric flux is Nm^2C^-1 Nm^2C Nm^-2C None of them 22 / 39 The electric flux over the surface of a sphere if it is charged with 10 micro coloumb 36π×10^4 36π×10^-4 36π×10^6 36π×10^5 23 / 39 1 coloumb is equal to........ Stat coloumb 3×10^10 3×10^9 3×10^-9 3×10^-10 24 / 39 1 stat coloumb is equal to 3×10^10 3×10^6 3×10^-9 1/3 ×10^-9 25 / 39 The electric dipole moment of an electric dipole made of two opposite charge having -3.2×10^-19 & 3.2×10^-19 and the seperation is 2.4× 10^-10 m 7.68× 10^ -27 7.68× 10^ -29 7.86×10^29 7.68× 10^ 27 26 / 39 The si unit of electric field is Cm^2 N/C V/m Both b &c 27 / 39 The law governing the force acting between two electric charge is known as Ampere law Gauss Law Ohm law Coloumb law 28 / 39 The dimension formula of free space permittivity is ML^4T^-2A-2 M^-1L^-3T^-3A ML^-3T^2A^-2 ML^2T^4A-2 29 / 39 The unit of permittivity of free space is CN^-2m^-2 CNm^-2 C^2N^-1m^-2 CNm^-3 30 / 39 n electric dipole are situated in a close surface. Total electric flux coming out from the surface will be q /€° Zero nq/€° 2q/€° 31 / 39 On moving from the surface of charged metallic sphere to the center of the charged sphere, the electric field Zero at all places Decrease Increases Same at all the place 32 / 39 Two equal and opposite charge of 5 coloumb are kept mutually at a distance of 5 cm. The electric dipole moment of the system is Zero 1 5×10^-2 25×10^-2 33 / 39 The dimension formula of intensity of electric field ML^2T^2A^2 MLT^2A^-1 M^1L^-2T^4A^2 MLT^-3A-1 34 / 39 The number of electron present in 8 coloumb of charge is 5× 10^19 2.5×10^19 1.6×10^19 1.25×10^19 35 / 39 Unit of linear charge density is meter/ coloumb Coloumb meter Coloumb/ meter None of these 36 / 39 When a electric dipole is placed in non uniform electric field then it experience A net torque A net force Both None of them 37 / 39 When an electric dipole is placed in uniform electric field then it will experience A net torque A net force Both None of these 38 / 39 Two charge sphere which are seperated by a distance d exert a force F on each other. If charge is doubled and distance between them is doubled then the force is F/2 4F F F/4 39 / 39 The no of electron for 2 coloumb of charge is 1.25×10^20 1.25×10^18 1.25×10^19 1.25×10^20 Your score isThe average score is 60% 0% Restart quiz
