physics practice set 1 for voclet

VOCLET 2013 LAST MINUTES SUGGESTION and PRACTICE SET SUBJECT: PHYSICS

1. A spring balance reads 60N when a block is suspended from the balance in air and 40N when the block is suspended from the balance remains immeresed i water. The specifice gravity of the block is a)2 b)8 c) 3/2 d) None of these Answer is : c) 3/2

2. Specific resistance of a wire depends on a)Material b)Length c)Mass d)Cross sectional area Answer is : a) Material

3. Fleming's left hand rule is applicable to a)Action of current on magnet b)Action of magnet on magnet c) Action of magnet on current d) Action of current on current Answer is : a) Action of current on magnet

4. A cork of specific gravity 0.25 is released from a certain depth in water. The initial upward acceleration of the cork is a)g b)2g c)3g d)4g Answer is : d) 4g

5. A convex lens is immersed in a liquid having refractive index as that of the material of the lens. The focal length of the lens will become a)remain unchanged b)zero c)infinity d)less but not zero Answer is : a) remain unchanged

6. SI unit of luminous flux is a)Candela b)Lumen c)Lux d)None of these Answer is : b) Lumen

7. Dimansion of gravitional constant is a)[M 2L -1T -2] b)[MLT -2] c)[M -1L 2T -2] d)Dimensionless Answer is : c) [M -1L 2T -2]

8. Resistance of a conductor is 5 Ω, length of this conductor is extended 20%. If volume of this conductor remain unchanged then new resistance of this conductor is a)7.2 Ω b)2.2 Ω c)2.7 Ω d)7.7 Ω Answer is : a) 7.2 Ω

9. Consider a block of mass 4kg pulled along a smooth horizontal surface by a horizontal force F. What value of F is required to give the block a horizontal velocity of 4.0 m/s in 2 sec starting from rest a)8 Dyne b)2 Dyne c)2 N d)8N Answer is : d) 8N

10. A train covers the first half of the distance between two place at a speed V1 and the second half at V2. THe avarage speed of the train is a)(V1+V2)/2 b)V1/V2 c) V1V2/(V1+V2) d)(V1+V2)/V1V2 Answer is : c) V1V2/(V1+V2)

11. The fraction of the total volume of an iceberg that is exposed (given density of ice is 0.92 gm/cc and that of sea water is 1.03 gm/cc) is a)12% b)11% c)88% d)89% Answer is : a) 12%

12. 250 N force is applied againest a body for some time. Mass of the body is 50 Kg and initial velocity was 100 m/s and end velocity is 50 m/s then calculate the total time of resistance force applied on the body a)1 sec b)10 sec c)1 m 10 sec d)11 sec Answer is : b) 10 sec

13. A lift is comming downwards with the velocity of g. One person is standing in the lift. What he/she will feel a)Weight less b)More weight c)Less weight d)Equal weight Answer is : a) Weight less

14. Dimansion of work is a)[M 2L -1T -2] b)[ML 2T -2] c)[ML 2T -3] d)[MLT -2] Answer is : b) [ML 2T -2]

15. 1 HP = a)746 watt b)1.34 watt c)550 watt d)550 N Answer is : a) 746 watt

16. 1 KWatt = ____ HP a)1.34 HP b)746 HP c) a and b d) 3/4 HP Answer is : d) 3/4 HP

17. Kinatic Energy of a body of mass m is E. Then mass-velocity of this body is a)√(2mE) b)√(mE) c)√(m/E) d)2√(mE) Answer is : a) √(2mE)

18. mass-velocity of a body of mass m is p. Then Kinatic Energy of this body is a)p2/m b)p/2m c)p2/m2 d)p2/2m Answer is : d) p2/2m

19. P force is applied on a body and the body start to travel at V velocity, then power of this body is a)F/V b)V/F c)F x V d)V/F2 Answer is : c) F x V

20. 3600 J work down by a boy in 2 minutes. Power of the boy is a)1800 watt b)432 x 104 c)3720 watt d)30 watt Answer is : d) 30 watt

21. A pump can through 10,000 Gallon watter 90 ft uppward in 1 hour. HP of this pump is a)4 HP b)4.5 HP c)5 HP d)5.5 HP Answer is : b) 4.5 HP

22. 20 HP = ______ Kwatt a)10 b)12 c)15 d)20 Answer is : c) 15

23. Joule's Law mathematical expression is a)H=IRt b)H=Rt c)H=IRt/J d)H=I2Rt/J Answer is : d) H=I2Rt/J

24. Two conductor have resistance ratio 5:2 and potential difference is 2:3. What is the ratio of current flow a)3:2 b)5:2 c)5:4 d)5:3 Answer is : d) 5:3

25. Relation between I (current), Q(charge), t (time) is a)I=Q/t b)I=Q x t c)I=t/Q d)I=Q2t Answer is : a) I=Q/t

Practice set of INTC (compuer) for VOCLET 2013

© Engg. Suman Biswas B.Tech (I.T)