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GGPUC NYAMATHI: 2PUC PHYSICS IMPORTANT QUESTIONS, CHAPTER -1: ELECTRICAL CHARGES AND FIELDS, 1. State and explain Coulomb's Law. Give the vector form of Coulomb's Law., 2. Define Sl unit of charge (OR Define coulomb)., 3. (a) Give any three properties of electric charge., 4. Define electric field. Give its SI unit and dimensional formula., S. Define electric flux. Give its SI unit and dimensional formula., 6. When will be the flux Is (i) maximum (ii) minimum through a surface?, 7. ) What is an electric dipole? (I) Define electric dipole moment. Give Its Sl unit and dimenslonal formula., 8. Derive the expression for torque an an electric dipole placed In a uniform external electric field., 9. Derive the expression of electric field due to a dipole at any point on its axis (axial point)., 10.Derive the expression of electric field due to a dipole at any point an its equatorial plane., 11.Sketch the electric field lines for a (a) negative point charge (Q< 0] (b) positive point charge [Q> 0] (c) dipole., 12.Define the following and give their SI units, (b) Give any three propertles of electric field lines., (a) Linear charge density, (ii) Surface charge density, (lii) Volume charge density., 13.State Gauss's law in electrostatics. Using Gauss's law in electrostatics, obtain the expression for electric field due to, infinitely long straight charged wire., 14. Using Gauss's law, obtain the expression for electric field due to an infinitely large charged plane sheet., 15.State Gauss's law in electrostatics. Using Gouss's low in electrostatics, obtain the expression for electric field due to a, uniformly charged thin spherical shell at a point. (i) Outside the shell and (ii) Inside the shell, CHAPTER – 2: ELECTROSTATIC POTENTIAL AND CAPACITANCE, 16.Define equipotential surface. Give an example. Mentian the two properties of equipotentlal surface., 17. Distinguish between polar and non-polar molecules. Give two examples to polar and non-polar molecules each., 18. Establish a relation between electric field and electric potential, OR Derive/Obtain: E =- dV/d! OR E =- dV/dr, 19. Define electrostatic potential. Derive the expression for electric potential due to an isolated point charge., 20. Derive the expression for potential energy of a system of two charges in the absence of external electric field., 21. Derive the expression for capacitance of a parallel plate capacitor with air as medium between the plate., 22.Name the three factors on which capacitance of a parallel plate capacitor depends., 23. Obtain the expression for effective capacitance of two capacitors when connected in (a) series (b) parallel., 24. Derive the expression for the energy stored in a capacitor with air as the medium between its plates., CHAPTER - 3: CURRENT ELECTRICITY, 25. Mention 2 factors on which resistance of a conductor depends. How does resistance of a conductor vary with its length?, 26.(a) State and explain Ohm's law., 27.Derive the relation = aE where terms have usual menaning., 28. (a) Define resistance and give its Sl unit., 29.Show the variation of resistivity of (i) conductors (li) semiconductors (iii) nichrome with temperature graphically., 30. (i) What is equivalent resistance?, 31.What is the principle/significance of Kirchhoff's (i) node/junction rule (ii) loop rule?, 32.Derive the expression for conductivity: a =, 33. Define mobility. Give its Si unit and dimensional formula., 34. Define drift velocity/speed and relaxation time. Derive the expression for drift velocity., 35.Two cells of emf E, and E, and internal resistance r, and r, are connected in series such that they send current in same, (b) Write three limitations of Ohm's law., (b) Define resistivity. Write the SI unit of resistivity., (ii) State and explain Kirchhoff's laws/rules., ne'r, Where the symbols have their usual meaning., direction. Derive an expression for equivalent internal resistance and equivalent emf of the combination., 36.Two cells of emf E, and E, and internal resistance r, and ra are connected in parallel such that they send current in, same direction. Derive an expression for equivalent internal resistance and equivalent emf of the combination., 37.Derive an expression for the balancing condition of Wheatstone's bridge., Scanned by CamScanner

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38.What is a potentiometer? Give the principle and two uses/applications of potentiometer., 39.Find the colour codes of a resistor of resistance () 0.2n1 5%., 40. A resistor is morked with colours red, red, orange and gold. Write the value of its resistance., 41.0btain the expression for effective resistance of two resistors when connected in (a) series (b) parallel., (i) 250 nt10%., (iil) 4.7 kn t20%., CHAPTER - 4: MOVING CHARGES AND MAGNETISM, 42.Derive the expression for magnetic force on a current carrying conductor: F = 1(1 xB), 43. What is Lorentz force? Write the expression for Lorentz force., 44. A negative charged particle enters a magnetic field normal to the direction of magnetic field. What is the nature of, the path traced by it?, 45.When will the magnetic forces on a moving charge be the (i) maximum (ii) minimum in a magnetic field?, 46.Derive the expressions for (1) radius (ii) angular frequency and (iii) time period of revolution of charged particle, %3D, moving perpendicular to the the magnetic field., 47. Derive an expression for the magnetic field at any point on the axis of a circular current loop/coil., 48. What Is a solenoid? Write the expression for magnetic field at a point inside the solenoid., 49. What is a toroid? Mention an expression for magnetic field at a point inside a toroid., so.Write the expression for force per unit length between two straight parallel current carrying conductors of infinite, length. Hence define "ampere"., 51.0btain an expression for the force between two infinitely long straight parallel conductors carrying current., 52. State Ampere's circuital law. Using it derive the expression for magnetic field at a point due to a long straight wire, carrying current., 53. (i) What is Gyromagnetic ratio? Mention its value. (ii) Define Bohr magneton. Mention its value?, 54. (i) Define current sensitivity of a galvanometer. (ii) Define voltage sensitivity of a galvanometer., 55.How can a moving coil galvanometer be converted into voltmeter? Explain with a diagram and expression., 56. How can a moving coil galvanometer be converted into ammeter? Explain with a diagram and expression., 57.(0) What is a cyclotron? Draw a diagram.(b) State the principle of cyclotron. (C) Give the application of cyclotron., CHAPTER -5: MAGNETISM AND MATTER, 58.(a) State and explain Gauss's Law in magnetism., 59. What are magnetic field lines? Give any three properties of magnetic field lines., 60. Define (i) Magnetisation (ii) Magnetic intensity (iii) Magnetic permeability (iv) Magnetic susceptibility and give their Sl unit., 61.Define magnetic elements of Earth (OR Define declination, dip and horizontal component of Earth's field)., 62.Give five properties of (o) Diamagnetic materials (b) Paramagnetic materials (c) Ferromognetic materials., 53. Write five differences between diamagnetic materials and paramagnetic materials., 64. Give five differences between diamagnetic materials and ferromagnetic materials., 65.Drow the variation of magnetic field with mognetic intensity when a ferromagnetic material is subjected to a cycle of, (b) Draw magnetic field lines pattern for a bar magnet., magnetization. OR Draw Hysteresis curve (B-H loop), 66. State ond explain Curies Low for poramagnetic materiols., 57. Define the terms: (i) Hysteresis (i) Retentivity (i) Coercivity., 68. Write the expression for magnetic potential energy of a magnetic dipole kept in a uniform magnetic field and, exploin the terms., 69. Show that o bar magnet is equivalent to a solenoid which produces the same magnetic field., CHAPTER - 6: ELECTROMAGNETIC INDUCTION, 70.Describe the magnet and coil experiment to demonstrate the phenomenon of electromagnetic Induction., 71. Briefly explain Henry and Faraday's coil-coil experiment on electromagnetic induction., 72.State and explain Faraday's law of electromagnetic induction., 73. What are eddy currents? Give two advantages/applications/uses of eddy currents., 74. State and explain lenz's law in electromagnetic induction. What is the significance of Lenz's law?, 75.What is motional electromotíve force?, 76.(1) What is meant by Self Induction and Mutual Induction? (i) Define Self Inductance and Mutual Inductance., Scanned by CamScanner

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77.Obtain the expression for motional emf Induced in a straight conducting (metal) rod when moved perpendicular in a, uniform magnetic field., 78.Mention any two factors on which (a) self-inductance of a coll depends (b) mutual Inductance of a coll depend., 79. Obtain the expression for energy stored In inductor/solenold., 80. What is AC generator? State the principle of AC Generator., 81. With the help of a labelled diagram, derive an expression for instantaneous current Induced emf In an AC generator., CHAPTER -7: ALTERNATING CURRENT, s2.Write the relation connected to rms value and peak value of alternating current., 33.Derive the expression for instantaneous current through an inductor and represent in phasor diagram., OR Show that voltage leads current by n/2 when A.C. voltage applied to pure Inductance., 84. Derive the expression for instantaneous current through a capacitor and Represent in phasor diagram., OR Show that current leads voltage by /2 when A.C. voltage applied to capacitor., 85. With the help of phasor diagram, derive the expressions for the impedance and current in a series LCR circuit, when, an ac voltage is applied to it., $6. Define resonance and resonant frequency in a series LCR-circuit. Obtain the expression for the resonant frequency., 87. (a) What is a transformer? (b) State the principle of transformer. (c) Mention three sources of power loss in a transformer., 88. Explain the construction and working of a transformer with a labeiled diagram., CHAPTER - 8; ELECTROMAGNETIC WAVES, $9.(0) What is displocement current? Give the expression for it. (b) Mention the need for displacement current., 90. Write the expression for Ampere-Maxwell's law. Explain the terms., 91. Who predicted the existence of electromagnetic waves? Give the wavelength range of EM spectrum., 92.(a) What is the source of electromagnetic waves?, 93. State two characteristics/properties of electromagnetic waves., 94.Mention the expression for speed of light (a) in vacuum (b) in a medium. Explain the symbols., 95.Give the wavelength range of (a) Microwaves (b) Infra-red waves (c) Ultraviolet radiations (d) X-rays (e) gamma rays, 96.Give any two applications/uses of (a) Microwaves (b) Infra-red waves (c) Ultraviolet radiations (d) X-rays (e) gamma rays., (b) What is the nature of electromagnetic waves?, CHAPTER - 9: RAY OPTICS AND OPTICAL INSTRUMENTS, 97.(i) Derive f = R/2. (ii) Derive the mirror equation in the case of real and inverted image formed by a concave mirror., 98.(a) Define critical angle. (b) What is total internal reflection? Mention the conditions for total internal reflection., 99. (a) Mention three applications of total internal reflection. (b) Write the principle and two uses of optical fibres., 100. Obtain an expression for the refractive index of the material of the prism in terms of the angle of the prism and, angle of minimum deviation., 101. Obtain the relation betweenu, v, R and n for spherical surface., 102. Derive Lens-maker's formula. Name two factors on which focal length of a thin fens depends., 103. Define the power of a lens. How does power of a lens related to its focal length?, 104. Derive the expression for effective focal length of two thin lenses kept in contact., 105. Draw a neat-labelled ray diagram (with arrow marks) of a simple microscope for the image formation and write, the expression for its magnification when the image is at near point., 106. Draw a neat labelled ray diagram (with arrow marks) of a compound microscope for the image formation and, write the expresslon for its magnification when the Image Is at near polnt., 107. Draw a neat labelled ray diagram (with arrows) of a (i) reflecting telescope (Cassegrain) (ii) refracting telescope., CHAPTER – 10 ; WAVE OPTICS, 108. Define wavetront. What type of wavefront obtained from (i) a point source (ii) a line source (ii) a star?, 109. State and explain Huygen's principle. Derive Snell's law of refraction using Huygen's principle., 110. Show that angle of reflection is equal to angle of incidence using Huygen's principle when a plane wave incldent, on a plane mirror., 111. Give the theory of interference. Hence write the conditions for constructive Interference and destructive, Interference in terms of (i) phase difference and (I) path difference., Scanned by CamScanner

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112. What is interference of light? Briefly describe Young's double-slit experiment., 113. Derive the expression for the fringe width of interference pattern in Young's double-slit experiment., 114. What is diffraction of light? Describe diffraction of light at a single slit. Glve conditions for minima and maxima., 115. Give the graphical representatlon of the distributlon of intensity on the screen In case of, (i) Young's double-slit experiment, 116. Give five differences between interference and diffractlon., (H) diffraction at a single slit., 117. Define resolving power (RP) of microscope. Write the expression for it. Mention two methods to increase RP., 118. Define resolving power (RP) of telescope. Give the expression for it. Mention two methods to increase RP., 119. State Brewster's law, Obtoin Brewster's law OR Show thot refractive index of a material: n= tani,, CHAPTER - 11: DUAL NATURE OF RADIATION AND MATTER, 120. Define (i) Work function of a metal (i) electron volt (eV) (iii) Threshold frequency and (iv) Stopping potential., 121. Mention three types of electron emission., 122. Write five experimental observations of photoelectric effect., 123. Write Einstein's photoelectric equation and explain the terms., 124. Give Einstein's explanation on photoelectric effect., 125. Mention any three characteristic properties of photon/particle nature of light., 126. What are matter waves? Write the de-Broglie relation for de-Broglie wavelength. Explain de-Broglie, hypothesis, 127. What is the aim of Davison Germer experiment? What are the conclusions, Davison Germer experiment?, CHAPTER - 12 : ATOMS, 128. Draw a neat labelled of a-particle scattering experiment. Write the two observations of the experiment., 129. Write the three postulates of Bohr's atom model. Mention two limitations of Bohr atom model., 130. Give an account of (Explain) the five spectral series of hydrogen atom., 131. Using Bohr's postulates, derive the expression for radius of electron in n stationary orbit of hydrogen atom., Hence write the expression for Bohr radius., 132. Using Bohr's postulates, derive the expression for velocity of electron in n" stationary orbit of hydrogen atom., 133. Assuming the expression for the radius of electron orbit, obtain the expression for the total energy of the electron, in the stationary orbit of hydrogen atom., CHAPTER - 13: NUCLEI, 134. Define isotope/isobar/isotone. Give examples to each., 135. Mention three characteristics/properties of nucleus., 136. Define mass defect and binding energy of a nucleus., 137. What is nuclear force? Mention four characteristics/properties of nuclear force., 138. Give five differences between nuclear fission and nuclear fusion., 139. Stote the low of radioactive decay. Hence derive N = Na e' for a radioactive sample., 140. (i) Define half-life and mean life of a radioactive sample. (ii) Define activity. State it SI unit., 141. Obtain the expression far half-life of a radioactive sample using the radioactive decay law. OR Derive T = 0.693/&, THAPTER – I4: SEMICONDUCTOR ELECTRONICS, 142. Classify the conductors, semiconductors and insulators on the basis of energy bands (band theory of solids)., 143. Give five differences between n-type and p-type semiconductors, 144. Give five differences between intrinsic and extrinsic semiconductors., 145. What is a rectifier? Describe the working of a p-n Junction diode as a half wave rectifier with the help of a circuit, diagram. Draw input and output waveforms., 146. What is rectification? Describe the working of a p-n junction diode as a as a full wave rec, with the help of a, circuit diagram. Draw input and output waveforms., 147. What is optoelectronic device? Name two optoelectronic devices., 148. Give the principle and two uses of (a) Photodiode (b) LED (c) solar cell., 149. Give circuit symbol and truth table for each gates: NOT, OR, AND, NAND and NOR., 150. How does a Zener diode work as a voltoge regulator? Explain with a circuit diagram., Note: Italic fonts belongs to reduced portions for the year 2020-21., Scanned by CamScanner