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Saturday, March 23, 2013

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
2. Specific resistance of a wire depends on
a)Material
b)Length
c)Mass
d)Cross sectional area
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
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
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
6. SI unit of luminous flux is
a)Candela
b)Lumen
c)Lux
d)None of these
7. Dimansion of gravitional constant is
a)[M 2L -1T -2]
b)[MLT -2]
c)[M -1L 2T -2]
d)Dimensionless
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
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
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
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%
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
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
14. Dimansion of work is
a)[M 2L -1T -2]
b)[ML 2T -2]
c)[ML 2T -3]
d)[MLT -2]
15. 1 HP =
a)746 watt
b)1.34 watt
c)550 watt
d)550 N
16. 1 KWatt = ____ HP
a)1.34 HP
b)746 HP
c) a and b
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)
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
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
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
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
22. 20 HP = ______ Kwatt
a)10
b)12
c)15
d)20
23. Joule's Law mathematical expression is
a)H=IRt
b)H=Rt
c)H=IRt/J
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
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
Practice set of INTC (compuer) for VOCLET 2013
© Engg. Suman Biswas B.Tech (I.T)

4 comments:

Anonymous said...

good questions :)

Unknown said...

Thnx,
Very good

Unknown said...

very good test pepar

Can you help us said...

nice tested