Physics · NDA previous year questions

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2014 24 questions

Q512014 · 28 Sept 2014
Light waves are
1. A.electro-mechanical waves
2. B.electro-magnetic waves
3. C.electro-optical waves
4. D.magneto-optical waves
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Answer: B
Q522014 · 28 Sept 2014
A particle is moving in a circular path of radius r at a constant speed v. Which one of the following graphs correctly represents its acceleration a?
1. A.Option A
2. B.Option B
3. C.Option C
4. D.Option D
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Answer: D
Q542014 · 28 Sept 2014
Fahrenheit and Celsius are the two scales used for measuring temperature. If the numerical value of a temperature recorded in both the scales is found to be same, what is the temperature?
1. A.- 40°
2. B.+ 40°
3. C.+ 72°
4. D.- 72°
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Answer: A
Q552014 · 28 Sept 2014
Which one of the following processes explains the splitting of a beam of white light into its constituent colours?
1. A.Dispersion
2. B.Reflection
3. C.Diffraction
4. D.Polarization
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Answer: A
Q562014 · 28 Sept 2014
Two bodies A and B having masses m and 4m respectively are moving with equal linear momentum. The ratio of kinetic energies between A and B is
1. A.1 : 4
2. B.4 : 1
3. C.1 : 1
4. D.1 : 2
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Answer: B
Q582014 · 28 Sept 2014
A force applied on a body is represented as $F = 6 \hat{i} - 8 \hat{j} + 10 \hat{k}$ and accelerates it at $1 m/ s^{2}$ . The mass of the body is
1. A. $10 kg$
2. B. $102 kg$
3. C. $210 kg$
4. D. $8 kg$
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Answer: B
Q592014 · 28 Sept 2014
A force $F$ , acting on an electric charge $q$ , in presence of an electro-magnetic field, moves the charge parallel to the magnetic field with velocity $v$ . Then $F$ is equal to (where $E$ and $B$ are electric field and magnetic field respectively)
1. A. $q E$
2. B. $q (v \times B)$
3. C. $q (v \times E)$
4. D. $q B$
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Answer: A
Q602014 · 28 Sept 2014
Which of the following are the correct parameters for the common domestic power supply in India?
1. A.220 V, 110 Hz
2. B.220 V, 50 Hz
3. C.110 V, 220 Hz
4. D.110 V, 50 Hz
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Answer: B
Q612014 · 28 Sept 2014
A ray of light travels from a medium of refractive index $n_{1}$ to a medium of refractive index $n_{2}$ . If angle of incidence is $i$ and angle of refraction is $r$ , then $\frac{s i n i}{s i n r}$ is equal to
1. A. $n_{1}$
2. B. $n_{2}$
3. C. $\frac{n _{2}}{n _{1}}$
4. D. $\frac{n _{1}}{n _{2}}$
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Answer: C
Q622014 · 28 Sept 2014
Light waves projected on oil surface show seven colours due to the phenomenon of
1. A.polarization
2. B.refraction
3. C.reflection
4. D.interference
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Answer: D
Q632014 · 28 Sept 2014
Directions
Directions : The following seven (7) 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 : (a) Both the statements are individually true and Statement II is the correct explanation of Statement I (b) Both the statements are individually true but Statement II is not the correct explanation of Statement I (c) Statement I is true but Statement II is false (d) Statement I is false but Statement II is true Statement I : It is not necessary that every bar magnet has one North Pole and one South Pole.
Statement II : Magnetic poles occur in pair.
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
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Answer: D
Q642014 · 28 Sept 2014
Directions
Directions : The following seven (7) 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 : (a) Both the statements are individually true and Statement II is the correct explanation of Statement I (b) Both the statements are individually true but Statement II is not the correct explanation of Statement I (c) Statement I is true but Statement II is false (d) Statement I is false but Statement II is true Statement I : It is not necessary that every bar magnet has one North Pole and one South Pole.
Statement I : A body moving in a circular path is acted upon by the centripetal force. Statement II : Centripetal force acting on the body is doing work to keep it rotating in the circular path.
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
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Answer: C
Q652014 · 28 Sept 2014
If the motion of an object is represented by a straight line parallel to the time axis in a distance-time graph, then the object undergoes
1. A.an accelerated motion
2. B.a decelerated motion
3. C.a uniform non-zero velocity motion
4. D.a zero velocity motion
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Answer: D
Q662014 · 28 Sept 2014
Kerosene oil rises in a wick of lantern because of
1. A.buoyancy of air
2. B.diffusion of the oil through the wick
3. C.capillary action in the wick
4. D.gravitational pull of the wick
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Answer: C
Q682014 · 28 Sept 2014
Two cars $A$ and $B$ have masses $m_{A}$ and $m_{B}$ respectively, with $m_{A} > m_{B}$ . Both the cars are moving in the same direction with equal kinetic energy. If equal braking force is applied on both, then before coming to rest
1. A. $A$ will cover a greater distance
2. B. $B$ will cover a greater distance
3. C.both will cover the same distance
4. D.distance covered by them will depend on their respective velocities
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Answer: C
Q692014 · 28 Sept 2014
A bullet is fired vertically up from a $400 m$ tall tower with a speed $80 m/s$ . If $g$ is taken as $10 m/ s^{2}$ , the time taken by the bullet to reach the ground will be
1. A. $8 s$
2. B. $16 s$
3. C. $20 s$
4. D. $24 s$
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Answer: C
Q702014 · 28 Sept 2014
A cyclotron accelerates particles of mass $m$ and charge $q$ . The energy of particles emerging is proportional to
1. A. $q^{2} / m$
2. B. $q / m^{2}$
3. C. $q^{2} / m^{2}$
4. D. $q$
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Answer: A
Q712014 · 28 Sept 2014
The electric field inside a perfectly conducting hollow object is
1. A. $4 π$
2. B.infinite
3. C.zero
4. D.dependent upon the shape of the object
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Answer: C
Q732014 · 28 Sept 2014
A particle is moving with uniform acceleration along a straight line ABC, where AB = BC. The average velocity of the particle from A to B is 10 m/s and from B to C is 15 m/s. The average velocity for the whole journey from A to C in m/s is
1. A.12
2. B.12.5
3. C.13
4. D.13.5
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Answer: A
Q742014 · 28 Sept 2014
The dimension of ‘impulse’ is the same as that of
1. A.pressure
2. B.angular momentum
3. C.work
4. D.linear momentum
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Answer: D
Q772014 · 28 Sept 2014
A thermodynamic process where no heat is exchanged with the surroundings is
1. A.isothermal
2. B.adiabatic
3. C.isobaric
4. D.isotropic
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Answer: B
Q852014 · 28 Sept 2014
Heat given to a body which raises its temperature by 1 °C is known as
1. A.water equivalent
2. B.thermal capacity
3. C.specific heat
4. D.temperature gradient
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Answer: B
Q872014 · 28 Sept 2014
How many grams of $MgC O_{3}$ contain $24.00 g$ of oxygen? (The molar mass of $MgC O_{3}$ is $84.30 g mo l^{- 1}$ )
1. A. $42.15 g$
2. B. $84.30 g$
3. C. $126.00 g$
4. D. $154.00 g$
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Answer: A
Q942014 · 28 Sept 2014
Consider the following statements : 1. Carbohydrates are the only source of energy to humans. 2. Fats give maximum energy on oxidation as compared to other foods. Which of the statements given above is/are correct?
1. A.1 only
2. B.2 only
3. C.Both 1 and 2
4. D.Neither 1 nor 2
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Answer: B