ch 9to 16 50 marks

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AGARWAL’S PHYSICS RAVI AGARWAL (M.Sc.) – 9913650950 / 9374727052 TIME : 1Hr.30 min. CH. 9 TO 16 Marks : 50 Q.I Very short answer question each carries 1 mark (16) 1 What is the wavelength of radiation being absorbed by Ozone layer? 2 De ne: Transverse magni cation. 3 Give full form of LASER. 4 What was the contribution of Frisch? 5 For which metals the nuclear radius estimated to be 10 -14 m? 6 Binding energy per nucleon is a measure of the ___________ of the nucleus. 7 What is absolute refractive index? 8 State: Huygens’s principle. 9 What was the name given to the two elements isolated from the uranium ore-Pitch Blende? 10 What is the width of depletion region? 11 What is interference? 12 Which electronic circuit can be used as a voltage regulator circuit? 13 What is the reason for the characteristics curve obtain in the X-ray spectrum obta 14 What was the contribution of Grimaldy in the eld of wave optics? 15 On what factors the work function of a metal depends? 16 In Davisson-Germer experiment, the electron gun having tungsten lament is coated with what material? Q.III Short answer question each carries 2 marks (16) 17 Explain the working of modem. 18 Describe: Re ection of light according to Huygens’s wave theory. 19 What was the Mosley’s observation for the X-ray? 20 What is arti cial nuclear transmutation? What is Q-value? And what do you mean by endorgenic and exorgenic process? 21 With the help of a schematic gure, explain the arrangement of Hertz’s experiment show how it forms an oscillator circuit. 22 Draw the graph of photoelectric current versus the potential of the collector w.r. for di erent intensity and frequency of light and explain. Hence, write characterist photoelectric e ect. 23 Write down the formulaofpath di erence for interference occursby two coherent sources.

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Physics

Transcript of ch 9to 16 50 marks

AGARWALS PHYSICS RAVI AGARWAL (M.Sc.) 9913650950 / 9374727052TIME: 1Hr.30 min. CH. 9 TO 16 Marks: 50Q.I Very short answer question each carries 1 mark (16) 1 What is the wavelength of radiation being absorbed by Ozone layer?2 Define: Transverse magnification.3 Give full form of LASER.4 What was the contribution of Frisch?5 For which metals the nuclear radius estimated to be 10-14m?6 Binding energy per nucleon is a measure of the ___________ of the nucleus.7 What is absolute refractive index?8 State: Huygenss principle.9 What was the name given to the two elements isolated from the uranium ore-Pitch Blende?10 What is the width of depletion region?11 What is interference?12 Which electronic circuit can be used as a voltage regulator circuit?13 What is the reason for the characteristics curve obtain in the X-ray spectrum obtained?14 What was the contribution of Grimaldy in the field of wave optics?15 On what factors the work function of a metal depends?16 In Davisson-Germer experiment, the electron gun having tungsten filament is coated with what material? Q.III Short answer question each carries 2 marks (16) 17 Explain the working of modem. 18 Describe: Reflection of light according to Huygenss wave theory. 19 What was the Mosleys observation for the X-ray? 20 What is artificial nuclear transmutation? What is Q-value? And what do you mean by endorgenic and exorgenic process? 21 With the help of a schematic figure, explain the arrangement of Hertzs experiment and show how it forms an oscillator circuit. 22 Draw the graph of photoelectric current versus the potential of the collector w.r.t. emitter for different intensity and frequency of light and explain. Hence, write characteristics of photoelectric effect. 23 Write down the formula of path difference for interference occurs by two coherent sources. And determine the distance between two consecutive bright fringes. 24 Explain: Binding energy of nucleus.

AGARWALS PHYSICS RAVI AGARWAL (M.Sc.) 9913650950 / 9374727052Q.IV Short answer question each carries 3 marks (18) 25 Depth of a well is 5.5m and refractive index of water is 1.33. If viewed from the top by how much height would the bottom of the well appear to be shifted up? 26 Light of wavelength 5000 is incident on a slit of width 2mm in Fraunhoffer diffraction. Find the width of 2nd maximum on the screen placed at the focal plane of the lens of focallength 100cm. The lens is placed closed to the slit. 27 Calculate the maximum wavelength of Balmer series in the hydrogen spectrum. Calculate the corresponding wave number. (Rydberg constant = 1.097 10-7m 28 In a X-ray tube the p.d. between the anode and the cathode is 12.4kV and current flowing is 2mA. Find, (a) the no. of electrons striking the anode in 1 sec. (b) the speed of electrons while striking the anode. (c) minimum wavelength emitted. 29 A 1000 W bulb is kept at the centre of a spherical surface and is at a distance of 10m from the surface. Calculate the force acting on the surface of the sphere by the electromagnetic waves, alongwith Eo, Bo (the maximum electric and magnetic field strengths) and I(the intensity of the waves). Take the working efficiency of the bulb 2.5% and consider it as a point source. Also calculate the energy density of the surface. 30 Draw the circuit diagram for N-P-N-CE transistor as an amplifier and obtain the expression for input, output and voltage gain.ALL THE BEST