Model Question Paper CET Physics - WIT Solapur

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RAJASTHAN P.E.T.PHYSICS-19971. In Bohr’s theory the potential of an electron at a position is kr 2 , k isconstant, then the quantized energy of the electron in n th orbit : 21 12(1) nh k (2) nh k(3) nh m (4) nh m 2m m k k2. To reduce the de-Broglies wave length of an electron from 100 pm to 50 pm,the required increase in energy is :(1) 150 eV (2) 300 eV (3) 450 eV (4) 600 eV3. The angular width of fringes in Young’s bislit experiment is 0.20 0 with thewavelength 5890 Å. If the whole apparatus is dipped in water, the angularwidth will be :(1) 0.30 0 (2) 0.22 0 (3) 0.15 0 (4) 0.11 04. Resistance of a 10 m. long wire of potentio meter is 1 ΩΩ Ω/m. A cell of 2.2 volt emf.and HRB is connected in series with the wire. How much resistance must be appliedto get 2.2 mv gradient :mt(1) 1000 Ω (2) 990 Ω (3) 810 Ω (4) 790 Ω5. Four charges are placed on corners of a square, having side of 5 cm. , if q isone coulomb then electric field intensity at the centre will be :q -2q-q + 2q(1) 1.02x10 7 N/c upwards(2) 2.04x10 7 N/c upwards(3) 2.04x10 7 N/c down(4) 1.02x10 7 N/c down6. Capacitance of a capacitor made by a thin metal foil is 2 µµµ F. If the foil isfilded with paper of thickness 0.15 mm. and dielectric constant of paper is2.5, width of paper is 40 mm. then length of foil will be :(1) 33.9 mm. (2) 13.4 mm. (3) 1.33 mm (4) 0.34 mm.
7. An electron and an αα- particle are accelerated with v volt voltage. If themasses are m e and m ααthen the ratio of momentum is :(1) 2m e (2) m e (3) m e (4) m em α 2m α m α m α8. Ultra sonic sound can be observed by :(1) Telephone (2) Hebb method (3) Quincke tube (4) Kundit tube9. Which two of the given transverse waves will give stationary wave when getsuper imposed :z 1 = a cos (kx - ωt) ….. Az 2 = a cos (kx _cot ) …..Bz 3 = a cox (ky - ωt) …..C(1) A and B (2) A and C (3) B and C (4) any two10. For what value of R the net resistance of the circuit will be 18 ohms :( 1) 24 Ω R(2) 16 Ω 10(3) 10 Ω 10(4) 8 Ω 1010 10 1011. For a medium refractive indices for violet, red and yellow are 1.62, 1.52 and1.55 resp. then dispersive power of medium will be :(1) 0.02 (2) 0.18 (3) 0.22 (4) 0.6512. The temperature at which the rms speed of hydrogen molecule is equal toescape velocity on earth surface will be :(1) 10059 K (2) 8270 K (3) 5030 K (4) 1060 K13. The temperature of a liquid drops from 365 K to 361 K in 2 minutes. Findthe time during which temperature of the liquid drops from 344 K to 342 K.Room temp. is 294 K.(1) 60 sec. (2) 66 sec. (3) 72 sec. (4) 84 sec.14. Venturimeter is used to measure :(1) surface teusion of liquid(2) rate of flow of liquid(3) density of liquid(4) pressure of liquid
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Question Bank
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75. In Nessler's reagent, the ion i
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