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PH2 1. 2. 3. 4. 5. 6. 7. 8. Branch of science that deals with the study forces, fields and potential arising from the static charges (a) Electronic (b) Electrostatic (c) Electromagnetic (d) None of the above Electric charge is a ________ quantity (a) Scalar (b) Vector (c) Neutral quantity (d) None of the above An electron possesses negative charge which value is _______ coulomb. (a) 1.6×1019 (b) 1.6×10-19 (c) 1.7×1019 (d) None of the above The total charge of the isolated system is always ________ (a) Deserved (b) Different (c) Same (d) Conserved All observable charge are always some integral multiple of element charge. That is (a) Additively (b) Conservation (c) Quantization (d) None of the above _______ is the space around a charge, in which any other charge experience an electrostatic force (a) Electric charge (b) Electric current (c) Electric field (d) None of the above The SI unit of electric field intensity (a) NC (b) N/C (c) NC2 (d) N/C2 E.ds q / (a) (b) (c) (d) XIX o is refers to – Yauss law Farade law Columb law None of the above 9. The phenomenon of protecting a certain retain of space form external electric field is electrostatic – (a) Building (b) Conductor (c) Shielding (d) None of the above 10. The centre of positive charge coincides with the centre of Negative charge in the molecules are dielectrics (a) Non polar (b) Polar (c) Both (a) and (b) (d) None of the above 11. The capacitance of the capacitor is C = (a) V / Q (b) QV (c) Q / V (d) 1 Q /V 2 12. Capacitance C depends on shape, size and ________ of the system of two conductors. (a) Partition (b) Combination (c) Separation (d) None of the above 13. 1 farad is equal to – (a) 1 C/V (b) 1 CV (c) 1 CV -1 (d) None of the above 14. In parallel plate capacitor, the direction of electric field is form_____ to _____, plate (a) Negative, Positive (b) Positive, Negative (c) Both (a) and (b) (d) None of the above 15. The work is stored in electrostatic potential energy U in capacitor is – (a) 2cv2 1 (b) C/V 2 1 (c) C2 V 2 2 (d) 1 CV 2 2 (1) PH2 16. The device used for building up high differences of order of the few million volts is – (a) Cycle generator (b) Vandde Graff generator (c) Electric generator (d) None of the above 17. Energy stored in charged capacitor is (a) W Q 2C 1 2 Q C 2 1 QC 2 (c) 2 (b) (d) None of the above 18. Electrostatic _____ is constant throughout the volume of the electric conductor. (a) Field (b) Current (c) Potential (d) None of the above 19. Rate of flow of electric charge flowing through any section of wire is – (a) Charge (b) Potential (c) Current (d) None of the above 20. V I refers to the law of – (a) Farade (b) Coulomb (c) Ohm (d) None of the above 21. Length of the conductor (L) is ______ to resistance (a) Proportional (b) Inversely proportional (c) Both (a) and (b) (d) None of the above 22. Current per unit area is called current _______ (a) Density (b) Potential (c) Capacitance (d) None of the above XIX 23. The relation between current density () conductivity () & electric field is – (a) J (b) E E J (c) J = E (d) None of the above 24. If area of cross action of a conductor is A and R is resistance then (a) R A 1 A (b) R (c) R A-2 (d) R A3 25. If drift velocity is V d then per unit electric field (E) is denoted by mobility () which is (a) =Vd E V (b) = d E (c) V μ d E (d) None of the above 26. If V = potential differences, I =current, t =time then electric energy is – VI t Vt (b) t (a) (c) VI t2 (d) VI t 27. If R1,R2,R3 are resistances combination in series is R5 is (a) R1.R2. R3 (b) 1 1 1 then R R R 1 2 3 (c) 1 R R 2 3 R 1 (d) R1+R2+R3 28. The relation between internal resistance () and external resistance (R) & current I, if E is end of collection (a) E =I(r + R) (b) I E R (c) E I rR (d) None of the above (2) PH2 29. The algebraic sum of currents meeting at a point in a electrical circuit is always______ (a) Equal (b) Zero (c) (d) None of the above 30. “In a closed loop, the algebraic sum of the end is equal to the algebraic sum of product of resistance and current flowing though them”. Refers kirchh off’s (a) First law (b) Second law (c) Third law (d) None of the above 31. A moving charged partied moves in the path (a) Parabolic (b) Elliptical (c) Cyclotron (d) none of the above 32. The angular momentum of electron (mvr) is an integral of _____ (a) h 2π h h (c) 2π (d) h 33. “An electron in an atom can revolve only in a certain stationary orbit” it is theory of (a) Rather ford (b) Neil Bohr (c) Turade (d) None of the above 34. Moving coil galvanometer works at the theory of current carrying coil is placed in a ________ field (a) Electric (b) Magnetic (c) Gravitional (d) None of the above 35. Out side the body of magnet, the direction of magnetic field lines is form ____ pole to ___ pole (a) South, North (b) North, South (c) North, North (d) South, South (b) XIX 36. The net magnetic flux (B) through any closed surface is always _____ (a) (b) Zero (c) MB sin (d) None of the above 37. Number of magnetic field lines _____ closed surface is always equal to the number of magnetic field lines _____ it (a) Entering, leaving (b) Leaving, entering (c) Entering, entering (d) None of the above 38. Angle between geographic meridian and magnetic mere dean is (a) Declination (b) Dip (c) Field (d) None of the above 39. Substances get strongly magnetic are – (a) Diamagnetism (b) Paramagnetism (c) Ferromagnetism (d) None of the above 40. If e d this refers to the law of dt (a) Newton (b) Faraday (c) Flaming (d) None of the above 41. The current induced in a conductor when placed in a changing magnetic field, is _______ current (a) Induced (b) Eddy (c) Alternate (d) None of the above 42. Transformer works on the principle of electromagnetic _______ (a) Oscillation (b) Field (c) Induction (d) Potential 43. For a transformer, input electric power is _______ to output electric power (a) Differ (b) Equal (c) Both (a) and (b) (d) None of the above (3) PH2 44. Electromagnetic wave carry energy and (a) Mass (b) Momentum (c) Velocity (d) Gravity 45. Each plat of capacitor has area = A, charge = Q then electric field E is – Q (a) A (b) (c) Q 0 Q A 0 (d) None of the above 46. Electric and magnetic field are ______ to each other with propagation (a) Parallel (b) Same (c) Perpendicular (d) None of the above 47. If radius of curvature (R) and focal length (f) then relation between f + R is (a) R = 2 f (b) f = R 2 (c) f = R.2 -1 (d) all of the above 48. If size of image I and size of object O then linear magnification m is O (a) I I (b) 51. The ratio of (a) Newton (b) Einstein (c) Snell (d) None of the above 52. Which is known as lens formula 1 1 (a) f v u 1 1 1 (b) v u f 1 1 1 (c) v u f (d) None of the above 53. Which is lens maker’s formula for a lens 1 1 1 (a) (μ 1) f R1 R 2 XIX 1 1 1 (μ 1) f R1 R 2 (c) Both (a) and (b) (d) None of the above For correction of myopia the lens are used (a) Convex (b) Concave (c) Both (a) and (b) (d) None of the above Two sources of light emitting light waves of same frequency or wave is – (a) Coherent (b) Initial source (c) Final sources (d) None of the above All the bright and dark fringes are of ______ width (a) Different (b) Equal (c) Both (a) and (b) (d) None of the above The phenomenon due to which the vibration of light are restricted in a particular plane is called _____ of light. (a) Diffractive (b) Interference (c) Polarization (d) None of the above (b) 54. 55. O (c) IO (d) None of the above 49. The phenomenon of charge in path of light of it goes from one medium to another medium is called (a) Reflection (b) Magnification (c) Diffraction (d) Refraction 50. Refractive index of medium b with respect to medium a is a equal to μ b sini (a) sinr (b) sin i(sin r ) 1 (c) sin icos ec r (d) All of the above sin i is called _____ law sin r 56. 57. (4) PH2 58. The intensity in field becomes minimum when the axis of analyzer and polarizer are _______ to each other (a) Parallel (b) Perpendicular (c) Both (a) and (b) (d) None of the above 59. The phenomenon of bending of light round the sharp corners of an obstacle is called (a) Interference (b) Diffraction (c) Polarization (d) None of the above 60. Each point on the primary wave front acts of a source of ______ wavelets (a) Primary (b) Tertiary (c) Secondary (d) None of the above 61. When electrons are emitted form the metal surface by light are _____ emission (a) Thermionic (b) Field (c) Photoelectric (d) None of the above 62. The number of photoelectron’s emitted per second is directly proportional to the ______ of incident radiation (a) Velocity (b) Momentum (c) Intensity (d) None of the above 63. The energy of a photon is given by E = (a) h v h v v (c) h (b) 64. Dual nature of matter having wave and _____ (a) Molecule (b) Body (c) Particle (d) None of the above 65. Bracket series is lie in the _____ region (a) Ultraviolet (b) Infra- red (c) Gamma (d) None of the above 66. Which element exhibit the same chemical properties, but differ in mass are (a) Isotope (b) Isobars (c) Isomerism (d) None of the above 67. Metals –possess very low resistively or high (a) Temperature (b) Permeability (c) Conductivity (d) None of the above 68. A semi conductor with impurity atom added to it is called (a) Intrinsic (b) Extrinsic (c) Both (a) and (b) (d) None of the above 69. A function diode made from light sensitive semi conductor is called – (a) Zener diode (b) Photo diode (c) Triode (d) None of the above 70. Transistor is as ______ (a) Rectifier (b) Amplifier (c) Both (a) and (b) (d) None of the above (d) None of the above XIX (5)