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2009 45 questions

Q722009 · 19 Apr 2009
What is the mass of one litre of cottonseed oil of density $926 kg/ m^{3}$ ?
1. A. $926 kg$
2. B. $92.6 kg$
3. C. $0.926 kg$
4. D. $9260 kg$
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Answer: C
Q732009 · 19 Apr 2009
The wavelength of X-rays is of the order of
1. A.1 mm
2. B.1 cm
3. C.1 micron
4. D.1 angstrom
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Answer: D
Q742009 · 19 Apr 2009
In vacuum, the speed of light
1. A.depends on its wavelength
2. B.depends on its frequency
3. C.depends on its intensity
4. D.neither depends on its wavelength, frequency nor intensity
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Answer: D
Q752009 · 19 Apr 2009
Which one of the following statements correctly defines power ?
1. A.Energy supplied per unit time
2. B.Energy of an object due to its motion
3. C.Energy of an object due to its position
4. D.None of the above
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Answer: A
Q762009 · 19 Apr 2009
The electric charge is stored in a device called
1. A.Inductor
2. B.Capacitor
3. C.Resistor
4. D.Transformer
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Answer: B
Q772009 · 19 Apr 2009
Consider the following parts of spectra : 1. Visible 2. Infrared 3. Ultraviolet 4. Microwave Which one of the following is the correct sequence in which their wavelengths increase ?
1. A.4 - 3 - 1 - 2
2. B.4 - 1 - 2 - 3
3. C.3 - 2 - 1 - 4
4. D.3 - 1 - 2 - 4
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Answer: D
Q792009 · 19 Apr 2009
Which one of the following is not electromagnetic in nature ?
1. A.Cathode-rays
2. B.X-rays
3. C.Gamma-rays
4. D.Infrared-rays
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Answer: A
Q802009 · 19 Apr 2009
1. A. $5 A$
2. B. $10 A$
3. C. $15 A$
4. D. $20 A$
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Answer: C
Q812009 · 19 Apr 2009
The force experienced by a unit positive test charge placed at a point is called
1. A.Magnetic field at that point
2. B.Gravitational field at that point
3. C.Electrical field at that point
4. D.Nuclear field at that point
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Answer: C
Q822009 · 19 Apr 2009
A long jumper runs before jumping because he
1. A.covers a greater distance
2. B.maintains momentum conservation
3. C.gains energy by running
4. D.gains momentum
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Answer: D
Q832009 · 19 Apr 2009
Which among the following is the necessary condition for simple harmonic motion ?
1. A.Constant period
2. B.Constant acceleration
3. C.Displacement and acceleration are proportional
4. D.Displacement and torque are proportional
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Answer: C
Q852009 · 19 Apr 2009
If an $α$ -particle is projected normally through a uniform magnetic field, then the path of the $α$ -particle inside the field will be
1. A.circular
2. B.parabolic
3. C.elliptic
4. D.a straight line
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Answer: A
Q862009 · 19 Apr 2009
How far must a girl stand in front of a concave spherical mirror of radius $120 cm$ to see an erect image of her face four times its natural size ?
1. A. $40 cm$ from the mirror
2. B. $45 cm$ from the mirror
3. C. $50 cm$ from the mirror
4. D. $55 cm$ from the mirror
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Answer: B
Q872009 · 19 Apr 2009
Match List I with List II and select the correct answer using the code given below the lists : List I ( $Type of electromagnetic radiation$ ) List II ( $Approximate wavelength in metres$ ) A. Infrared radiation B. X-rays C. Ultraviolet radiation D. Gamma rays 1. $1 0^{- 12}$ 2. $1 0^{- 5}$ 3. $1 0^{- 10}$ 4. $1 0^{- 8}$ Code : A B C D
1. A.2 3 4 1
2. B.1 4 3 2
3. C.1 3 4 2
4. D.2 4 3 1
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Answer: A
Q882009 · 19 Apr 2009
1. A.Fundamental
2. B.First overtone
3. C.Second overtone
4. D.Third overtone
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Answer: C
Q892009 · 19 Apr 2009
A sonometer wire having a length of $50 cm$ is vibrating in the fundamental mode with a frequency of $100 Hz$ . Which of the following is the type of propagating wave and its speed ?
1. A.Longitudinal, $50 m/s$
2. B.Transverse, $50 m/s$
3. C.Longitudinal, $100 m/s$
4. D.Transverse, $100 m/s$
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Answer: D
Q902009 · 19 Apr 2009
Which one of the following is the amount of heat given up when $20 g$ of steam at $10 0^{\circ} C$ is condensed and cooled to $2 0^{\circ} C$ ?
1. A. $10000 cal$
2. B. $11400 cal$
3. C. $12400 cal$
4. D. $13600 cal$
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Answer: C
Q912009 · 19 Apr 2009
Which one of the following is the mode of heat transfer in which warm material is transported so as to displace a cooler material ?
1. A.Conduction only
2. B.Convection only
3. C.Radiation
4. D.Both conduction and convection
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Answer: B
Q922009 · 19 Apr 2009
On planet Earth, there is no centrifugal force at the
1. A.Equator
2. B.Tropic of Cancer
3. C.Tropic of Capricorn
4. D.Poles
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Answer: D
Q1052009 · 19 Apr 2009
Directions : Each of the following items consists of two statements, one labelled as the 'Assertion (A)' and the other as 'Reason (R)'. Examine the two statements carefully and select the answer using the codes given below. Assertion (A) : Two artificial satellites having different masses and revolving around the Earth in the same circular orbit have same speed. Reason (R) : The speed of a satellite is directly proportional to the radius of its orbit.
1. A.Both A and R are individually true and R is the correct explanation of A
2. B.Both A and R are individually true but R is not the correct explanation of A
3. C.A is true but R is false
4. D.A is false but R is true
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Answer: C