Physics · NDA previous year questions

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2012 35 questions

Q782012 · 19 Aug 2012
Which one among the following is the correct order of power consumption for light of equal intensity ?
1. A.CFL tube < Fluorescent tube < Incandescent bulb < Light emitting diode
2. B.Light emitting diode < CFL tube < Fluorescent tube < Incandescent bulb
3. C.CFL tube < Fluorescent tube < Light emitting diode < Incandescent bulb
4. D.Incandescent bulb < Light emitting diode < Fluorescent tube < CFL tube
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Answer: B
Q802012 · 19 Aug 2012
A swinging pendulum has its maximum acceleration at
1. A.the bottom of the swing
2. B.the two extremities of the swing
3. C.every point on the swing
4. D.no particular portion of the pendulum
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Answer: B
Q822012 · 19 Aug 2012
The process of nuclear fusion in the sun requires
1. A.very high temperature and very high pressure
2. B.low temperature and high pressure
3. C.high temperature and low pressure
4. D.very high temperature and no pressure
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Answer: A
Q842012 · 19 Aug 2012
In India, distribution of electricity for domestic purpose is done in the form of
1. A.220 V; 50 Hz
2. B.110 V; 60 Hz
3. C.220 V; 60 Hz
4. D.110 V; 50 Hz
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Answer: A
Q852012 · 19 Aug 2012
The earth’s magnetic field is approximately
1. A.1 Tesla
2. B.2 Gauss
3. C. $1 0^{4}$ Tesla
4. D.1 Gauss
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Answer: D
Q862012 · 19 Aug 2012
Yellow colour light is used as fog light because yellow colour
1. A.light is most scattered by fog
2. B.has the longest wavelength among all colours
3. C.has the longest wavelength among all colours except red and orange but the red colour is already used for brake light and stop light whereas orange colour is avoided due to its similarity with red
4. D.has the shortest wavelength among all colours not already reserved for other purpose
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Answer: C
Q872012 · 19 Aug 2012
A hot object loses heat to its surroundings in the form of heat radiation. The rate of loss of heat depends on the
1. A.temperature of the object
2. B.temperature of the surroundings
3. C.temperature difference between the object and its surroundings
4. D.average temperature of the object and its surroundings
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Answer: C
Q882012 · 19 Aug 2012
The mirror used for the head light of a car is
1. A.spherical concave
2. B.plane
3. C.cylindrical
4. D.parabolic concave
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Answer: D
Q902012 · 19 Aug 2012
Match List I with List II and select the correct answer using the code given below the Lists: | List I *(Magnet)* | List II *(Property)* | | :--- | :--- | | A. Artificial magnet | 1. Long lived | | B. Permanent magnet | 2. Last for infinitely long period | | C. Temporary magnet | 3. Short lived | | D. Earth as a magnet | 4. Induced magnet | *Code :*
1. A.3 1 4 2
2. B.3 4 1 2
3. C.2 1 4 3
4. D.2 4 1 3
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Answer: A
Q922012 · 19 Aug 2012
The polarity of an unmarked horse shoe magnet can be determined by using
1. A.a charged glass rod
2. B.a magnetic compass
3. C.an electroscope
4. D.another unmarked bar magnet
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Answer: B
Q932012 · 19 Aug 2012
A staircase has 5 steps each $10 cm$ high and $10 cm$ wide. What is the minimum horizontal velocity to be given to the ball so that it hits directly the lowest plane from the top of the staircase? ( $g = 10 ms^{- 2}$ )
1. A. $2 ms^{- 1}$
2. B. $1 ms^{- 1}$
3. C. $2 ms^{- 1}$
4. D. $\frac{1}{2} ms^{- 1}$
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Answer: C
Q952012 · 19 Aug 2012
Consider the following circuit: The current flowing through each of the resistors connected in the above circuit is
1. A.2A
2. B.1A
3. C.9A
4. D.4A
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Answer: A
Q962012 · 19 Aug 2012
Telescopes are placed in space to view distant galaxies primarily to
1. A.get closer to the observed objects
2. B.avoid the absorption of light or other radiations in the atmosphere of the earth
3. C.avoid light pollution from the earth's populated areas
4. D.avoid steering the telescope against the earth's motion
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Answer: B
Q1002012 · 19 Aug 2012
When an electrical safety fuse is rated (marked) as 16 A, it means it
1. A.will not work if current is less than 16 A
2. B.has a resistance of 16 Ω
3. C.will work if the temperature is more than 16°C
4. D.will be blown (break) if current exceeds 16 A
Show answer
Answer: D
Q512012 · 15 Apr 2012
Directions
Directions : The following nine (09) items consist of two statements, Statement I and Statement II. You are to examine these two statements carefully and select the answers to these items using the code given below : Code : Statement I : The blue colour of copper sulphate crystal disappears when it is heated strongly.
Statement II : Due to heating, water of crystallization of crystal is lost.
1. A.Both the statements are individually true and Statement II is the correct explanation of Statement I
2. B.Both the statements are individually true but Statement II is not the correct explanation of Statement I
3. C.Statement I is true but Statement II is false
4. D.Statement I is false but Statement II is true
Show answer
Answer: A
Q552012 · 15 Apr 2012
Directions
Directions : The following nine (09) items consist of two statements, Statement I and Statement II. You are to examine these two statements carefully and select the answers to these items using the code given below : Code : Statement I : The blue colour of copper sulphate crystal disappears when it is heated strongly.
Statement I : Water is a high boiling point liquid. Statement II : Hydrogen bonding in water is responsible for high boiling point of water.
1. A.Both the statements are individually true and Statement II is the correct explanation of Statement I
2. B.Both the statements are individually true but Statement II is not the correct explanation of Statement I
3. C.Statement I is true but Statement II is false
4. D.Statement I is false but Statement II is true
Show answer
Answer: A
Q562012 · 15 Apr 2012
Directions
Directions : The following nine (09) items consist of two statements, Statement I and Statement II. You are to examine these two statements carefully and select the answers to these items using the code given below : Code : Statement I : The blue colour of copper sulphate crystal disappears when it is heated strongly.
Statement I : Convex mirror is used as a driver mirror. Statement II : Images formed by convex mirror are diminished in size.
1. A.Both the statements are individually true and Statement II is the correct explanation of Statement I
2. B.Both the statements are individually true but Statement II is not the correct explanation of Statement I
3. C.Statement I is true but Statement II is false
4. D.Statement I is false but Statement II is true
Show answer
Answer: A
Q582012 · 15 Apr 2012
Directions
Directions : The following nine (09) items consist of two statements, Statement I and Statement II. You are to examine these two statements carefully and select the answers to these items using the code given below : Code : Statement I : The blue colour of copper sulphate crystal disappears when it is heated strongly.
Statement I : Bats can catch their prey in the darkness of night. Statement II : Bats can produce and also detect ultrasound.
1. A.Both the statements are individually true and Statement II is the correct explanation of Statement I
2. B.Both the statements are individually true but Statement II is not the correct explanation of Statement I
3. C.Statement I is true but Statement II is false
4. D.Statement I is false but Statement II is true
Show answer
Answer: A
Q692012 · 15 Apr 2012
A refracting telescope consists of
1. A.one concave mirror and one convex lens
2. B.two convex lenses of equal focal length
3. C.two concave mirrors of different focal lengths
4. D.two convex lenses of unequal focal lengths
Show answer
Answer: D
Q712012 · 15 Apr 2012
Two similarly charged bodies are kept 5 cm apart in air. If the second body is shifted away from the first by another 5 cm, their force of repulsion will be
1. A.doubled
2. B.halved
3. C.quadrupled
4. D.reduced to one-fourth
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Answer: D
Q722012 · 15 Apr 2012
A glass of water does not turn into ice as it reaches 0 °C. It is because
1. A.water does not solidify at 0 °C
2. B.a certain amount of heat must be supplied to the glass of water so as to solidify
3. C.a certain amount of heat must be taken out from the glass of water so as to solidify
4. D.water solidifies at 0 K only
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Answer: C
Q732012 · 15 Apr 2012
The main power supply in India is at 220 V, whereas that in the US is at 110 V. Which one among the following statements in this regard is correct?
1. A.110 V is safer but more expensive to maintain
2. B.110 V is safer and cheaper to maintain
3. C.110 V leads to lower power loss
4. D.110 V works better at higher latitudes
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Answer: A
Q832012 · 15 Apr 2012
1. A.Option A
2. B.Option B
3. C.Option C
4. D.Option D
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Answer: A
Q842012 · 15 Apr 2012
The penetrating power of X-rays can be increased by
1. A.increasing the current in the filament
2. B.decreasing the potential difference between the cathode and the anode
3. C.decreasing the current in the filament
4. D.increasing the potential difference between the cathode and the anode
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Answer: D
Q852012 · 15 Apr 2012
1. A. $A B$ and $B C$
2. B. $B C$ and $D E$
3. C. $C D$ and $D E$
4. D. $D E$ and $A B$
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Answer: B