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Recent questions in 2014
Questions
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JEEMAIN and NEET
>>
NEET PAST PAPERS
>>
2014
In an ammeter 0.2% of main current passes through the galvanometer. If resistance of galvanometer is G, the resistance of ammeter will be:
neet
physics
past papers
2014
30
asked
Aug 20, 2018
by
pady_1
1
answer
Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole
→
m
. Which configuration has highest net magnetic dipole moment?
neet
physics
past papers
2014
29
asked
Aug 20, 2018
by
pady_1
1
answer
A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0 V and a negligible internal resistance. The potentiometer wire itself is 4 m long. When the resistance, R, connected acrose the given cell, has values of. <br> (i) infinity
(ii) 9.5 Q <br> The 'balancing lengths, on the potentiometer wire are found to be 3m and 2.85 m, respectively. <br> The value of internal resistance of the cell is:
neet
physics
past papers
2014
28
asked
Aug 20, 2018
by
pady_1
1
answer
The resistance in the two arms of the meter bridge are 5
Ω
and R
Ω
, respectively. When the resistance R is shunted with an equal resistance, the new balance point is at
1.6
ℓ
1
. The resistance 'R' is : <br>
neet
physics
past papers
2014
27
asked
Aug 20, 2018
by
pady_1
1
answer
Two cities are 150 km apart. Electric power is sent from one city to another city through copper wires. The fall of potential per km is 8 volt and the average resistance per km is 0.5
Ω
The power loss in the wire is:
neet
physics
past papers
2014
26
asked
Aug 20, 2018
by
pady_1
1
answer
In a region the potential is represented by V(x, y, z) = 6x - 8xy - 8y + 6yz, where Vis in volts and x, y, z, are in meters. The electric force experienced by a charge of 2 coulomb situated at point (1, 1,1) is :
neet
physics
past papers
2014
25
asked
Aug 20, 2018
by
pady_1
1
answer
A conducting sphere of radius R is given a charge Q. The electric potential and the electric field at the centre of the sphere respectively are:
neet
physics
past papers
2014
24
asked
Aug 20, 2018
by
pady_1
2
answers
Two thin dielectric slabs of dielectric constants
K
1
and
K
2
(
K
1
<
K
2
)
are inserted between plates of a parallel plate capacitor, as shown in the figure. The variation of electric field 'E' between the plates with distance 'd' as measured from plate P is correctly shown by: <br>
neet
physics
past papers
2014
23
asked
Aug 20, 2018
by
pady_1
1
answer
A speeding motorcyclist sees traffic jam ahead of him. He slows down to 36km/hour. He finds that traffic has eased and a car moving ahead of him at 18 km/hour is honking at a frequency of 1392 Hz. If the speed of sound is 343 m/s, the frequency of the honk as heard by him will be:
neet
physics
past papers
2014
22
asked
Aug 20, 2018
by
pady_1
1
answer
The number of possible natural oscillations of air column in a pipe closed at one end of length 85 cm whose frequencies lies below 1250 Hz are: (velocity of sound =
340
m
s
−
1
)
neet
physics
past papers
2014
21
asked
Aug 20, 2018
by
pady_1
1
answer
If
n
1
,
n
2
and
n
3
are the fundamental frequencies of three segments into which a string is divided, then the original fundamental frequency n of the string is given by:
neet
physics
past papers
2014
20
asked
Aug 20, 2018
by
pady_1
1
answer
The mean free path of molecules of a gas (radius 'r') is inversely proportional to :
neet
physics
past papers
2014
19
asked
Aug 20, 2018
by
pady_1
1
answer
A thermodynamics system undergoes cyclic process ABCDA as shown in Fig. The work done by the system in the cycle is: <br>
neet
physics
past papers
2014
18
asked
Aug 20, 2018
by
pady_1
1
answer
A mono atomic gas at a pressure P, having a volume V expands isothermally to a volume 2V and then adiabatically to a volume 16V. The final pressure of the gas is : (take
γ
=
5
/
3
)
neet
physics
past papers
2014
17
asked
Aug 20, 2018
by
pady_1
1
answer
Certain quantity of water cools from
70
°
C
to
60
°
C
in the first 5 minutes and to
54
°
C
in the next 5 minutes. The temperature of the surroundings is;
neet
physics
past papers
2014
16
asked
Aug 20, 2018
by
pady_1
1
answer
Steam at
100
0
C
is passed into 20g of water at
10
0
C
When water acquires a temperature of
80
0
C
, the mass of water present will be: <br> [Take specific heat of water =
1
c
a
l
g
−
10
C
−
1
and latent heat of steam =
540
c
a
l
g
–
1
]
neet
physics
past papers
2014
15
asked
Aug 20, 2018
by
pady_1
1
answer
A certain number of spherical drops of a liquid of radius 'r' coalesce to form a single drop of radius 'R' and volume 'V'. If 'T' is the surface tension of the liquid then:
neet
physics
past papers
2014
14
asked
Aug 20, 2018
by
pady_1
1
answer
Copper of fixed volume 'V' is drawn into wire of length
′
λ
′
. When this wire is subjected to a constant force 'F', the extension produced in the wire is
′
Δ
ℓ
′
. Which of the following graph is a straight line ?
neet
physics
past papers
2014
13
asked
Aug 20, 2018
by
pady_1
1
answer
Dependence of intensity of gravitational field (E) of earth with distance (r) from centre of earth is correctly represented by :
neet
physics
past papers
2014
12
asked
Aug 20, 2018
by
pady_1
1
answer
A block hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximate radius would earth (mass =
5.98
×
10
24
k
g
) have to be compressed to be a black hole ?
neet
physics
past papers
2014
11
asked
Aug 20, 2018
by
pady_1
1
answer
The ratio of the acceleration for a solid sphere (mass 'm' and radius 'R') rolling down an incline of angle 'θ' without slipping and slipping down the incline without rolling is :
neet
physics
past papers
2014
10
asked
Aug 20, 2018
by
pady_1
1
answer
A solid cylinder of mass 50 kg and radius 0.5 m is free to rotate about horizontal axis. A massless string is wound round the cylinder with one end attached to it and other hanging freely. Tension in the string required to produce an angular acceleration of 2 revolutions
s
–
2
neet
physics
past papers
2014
9
asked
Aug 20, 2018
by
pady_1
1
answer
The oscillation of a body on a smooth horizonatal surface is represented by the equation,
X
=
A
cot
(
ω
t
)
<br> where,
X
= displacement at time
t
<br>
ω
= frequency of oscillation <br> Which one of the following graph shows correctly the variation
′
a
′
with
′
t
′
? <br> Here a = acceleration at time t <br> T = time period
neet
physics
past papers
2014
8
asked
Aug 20, 2018
by
pady_1
1
answer
A body of mass (4m) is lying in x-y plane at rest. It suddenly explodes into three pieces. Two pieces each of mass (m) move perpendiculr to each other with equal speeds
(
v
)
. The total kinetic energy generated due to explosion is :
neet
physics
past papers
2014
7
asked
Aug 20, 2018
by
pady_1
1
answer
A balloon with mass 'm' is descending down with an acceleration 'a' (where a < g). How much mass should be removed from it so that it starts moving up with an acceleration 'a' ?
neet
physics
past papers
2014
6
asked
Aug 20, 2018
by
pady_1
1
answer
The force 'F' acting on a particle of mass 'm' is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from zero to 8 s is : <br>
neet
physics
past papers
2014
5
asked
Aug 20, 2018
by
pady_1
1
answer
A system consists of three masses
m
1
,
m
2
and
m
3
connected by a string passing over a pulley
P
. The mass
m
1
hangs freely and
m
2
and
m
3
are on a rough horizontal table (the coefficient of friction=
μ
). The pulley is frictionless and of negligible mass. The downward acceleration of mass
m
1
is : (Assume
m
1
=
m
2
=
m
3
=
m
) <br>
neet
physics
past papers
2014
4
asked
Aug 20, 2018
by
pady_1
1
answer
A particle is moving such that its position coordinates (x,y) are (2m, 3m) at time t= 0, (6m,7m) at time t= 2s and (13m, 14m) at time t= 5 s, Average velocity vector (
→
V
a
v
) from t = 0 to t= 5 sis:
neet
physics
past papers
2014
3
asked
Aug 20, 2018
by
pady_1
1
answer
A projectile is fired from the surface of the earth with a velocity of
5
m
s
−
1
and angle
θ
with the horizontal. Another projectile fired from another planet with a velocity of
3
m
s
−
1
at the same angle follows a trajectory which is identical with the trajectory of the projectile fired from the earth. The value of the acceleration due to gravity on the planet is : (given =
9.8
m
s
−
2
)
neet
physics
past papers
2014
2
asked
Aug 20, 2018
by
pady_1
1
answer
If force (F), velocity(V) and time (T) are taken as fundamental units, the dimensions of mass are
neet
physics
past papers
2014
1
asked
Aug 20, 2018
by
pady_1
1
answer
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