#1
July 14th, 2016, 02:39 PM
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West Bengal JEXPO Question Paper
Can you provide me previous year Physics question paper of JEXPO which is conducted by West Bengal State Council of Technical Education (WBSCTE) in West Bengal?
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#2
July 14th, 2016, 03:41 PM
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Re: West Bengal JEXPO Question Paper
The previous year Physics question paper of JEXPO which is conducted by West Bengal State Council of Technical Education (WBSCTE) in West Bengal is as follows: 1. The speed of light in a medium of refractive index 1.5 is: a) 3x10 8 m/s b) 2x10 8 m/s c) 4.5x10 8 m/s d) 1.5x10 8 m/s Ans: b) 2x10 8 m/s 2. A vessel contains oil (density=0.8g/cm 3 ) over mercury (density=13.6g/cm 3 ). A homogeneoussphere floats with half its volume immersed in mercury and other half in oil. The density of the material of the sphere in g/cm 3 : a) 3.3 gm/cm 8 b) 6.4 gm/cm 8 c) 7.2 gm/cm 8 d) 12.8 gm/cm 8 Ans: c) 7.2 gm/cm 8 3. A ray of light passes from vacuum into a medium of refractive index μ. If the reflected ray and the refracted ray are perpendicular to each other, the angel of incidence is: a) tan -1 μ b) sin -1 μ c) cos -1 μ d) 2sin -1 (μ/2) Ans: a) tan -1 μ 4. A certain wire has resistance of 10 ohm. If it is stretched by 1/10th of its length then the resistance is nearly: a) 9 ohm b) 10 ohm c) 11 ohm d) 12 ohm Ans: c) 11 ohm 5. A virtual image is formed by a convex lens when the object lies: a) on focus b) between f and 2f c) within focus and pole d) between 2f and infinity Ans: b) between f and 2f and d) between 2f and infinity 6. Equivalent resistance between A and B is : a) 9 Ω* b) 4 Ω c) 7 Ω* d) 5Ω* Ans: c) 11Ω 7. A boat takes 2 hours to travel 8km and back in still water. If the velocity of water is 4 km/hr, the time taken for going upstream 8 km and coming back is :* a) 2 hr* b) 2 hr 40 min* c) 1 hr 20 min* d) 4 hr* Ans: b) 2 hr 40 min 8. The work done by a lifting machine in lifting a load of 100 kg to the top of building of height 20 m is (g=9.8 m/s2) :* a) 0.196 x 103J* b) 1.196 x 103J c) 19.6 x 103J* d) 196.0 x 103J* Ans: c) 19.6 x 103J 9. The S.I unit of magnetic flux is :* a) weber/m^2* b) amp-m^2* c) weber* d) volt* Ans: c) weber 10. A cork of specific gravity 0.8 is taken under water (sp. gr.=1) and relesed. THe upward acceleration of the cork is :* a) g* b) g/2 c) g/4* d) g/6* Ans: c) g/4 11. Two body of masses mA*and mB*(mA> mB) and momentum PA*and PB*respectively have the same kinetic energy (KE). Then :* a) PA*= PB* b) PA*< PB c) PA*> PB* d) PA*≈ PB*(≈ approximately equal to)* Ans: c) PA*> PB 12. The power of a concave lens of focal length 20 cm is :* a) +5.0 D* b) -5.0 D c) +0.5 D* d) -0.5 D Ans: b) -5.0 D 13. The critical angle of light ray from medium A into medium B is θ. The speed of light in medium A is v. The speed of light in medium B is :* a) v/sinθ* b) v sinθ c) v/tanθ* d) v tanθ* Ans: a) v/sinθ 14. A body, starting from rest and moving with a constant acceleration, covers a distance s1*in 2nd second and a distance s2in the 4th second. The ratio of s1/ s2*is :* a) 1/4* b) 3/7 c) 1/3* d) 5/9 Ans: b) 3/7 15. Four wires of the same material are stretched by the same load. The dimensions are given below. Which of them will elongate the most ?* a) length-100 cm, diameter-1mm* b) length-200 cm, diameter-2mm c) length-300 cm, diameter-3mm* d) length-400 cm, diameter-0.5mm* Ans: d) length-400 cm, diameter-0.5mm |
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