Download neet test paper 05 - Sigma Physics Centre

PHYSICS
NEET TEST PAPER 05
1.The test is of 1 hour duration.
2.The Test Booklet consists of 30 questions. The maximum marks are 120.
3.There is one part in the question paper. The distribution of marks is as under for each correct response.
Physics (120 marks) – Question No. 1 to 30 consist of FOUR (4) marks each for correct response. (-1) mark will be awarded
for each wrong response.
1.
2.
3.
Two forces are such that the sum of their
magnitudes is 18 N and their resultant is
perpendicular to the smaller force. Then the
magnitudes of the forces are:
(a) 12 N, 6 N
(b) 13 N, 5 N
(c) 10 N, 8 N
(d) 16 N, 2 N
Speeds of two identical cars are u and 4u at a
specific instant. The ratio of the respective
distances at which the two cars are stopped from
that instant is:
(a) 1 : 1
(b) 1 : 4
(c) 1 : 8
(d) 1 : 16
8.
of 0.6 ms–2 on a frictionless surface, then what is
the tension (in N) in the string between the blocks
B and C ?
9.
1 mole of a gas with  = 7/5 is mixed with 1 mole
of a gas with  = 5/3, then the value of  for the
4.
5.
6.
(a) 9.2
(b) 7.8
(d) 4
(d) 9.8
One end of massless rope, which passes over a
massless and frictionless pulley P is tied to a hook
C while the other end is free. Maximum tension
that the rope can bear is 360 N. With what value of
maximum safe acceleration (in ms–2) can a man of
resulting mixture is:
(a) 7/5
(b) 2/5
(c) 24/16
(d) 12/7
If a charge q is placed at the center of the line
joining two equal charges Q such that the system is
in equilibrium then the value of q is:
(a) Q / 2
(b) – Q / 2
(c) Q / 4
Three identical blocks of masses m = 2 kg are
drawn by a force F = 10.2 N with an acceleration
60 kg climb on the rope ?
(d) – Q / 4
Capacitance (in F) of a spherical conductor having
radius 1 m, is:
(a) 1.1 x 10–10
(b) 10–6
(c) 9 x 10–9
(d) 10–3
10.
A light string passing over a smooth light pulley
(a) 16
(b) 6
(c) 4
(d) 8
A particle of mass m moves along line PC with
velocity v as shown. What is the angular
momentum of the particle about P ?
connects two blocks of masses m1 and m2
7.
(vertically). If the acceleration of the system is g/8,
then the ratio of the masses is:
(a) 8 : 1
(b) 9 : 7
(c) 4 : 3
(d) 5 : 3
Two spheres of the same material have radii 1 m
and 4 m and temperatures 4000 K and 2000 K
respectively. The ratio of the energy radiated per
second by the first sphere to that by the second is:
(a) 1 : 1
(b) 16 : 1
(c) 4 : 1
(d) 1 : 9
(a) mvL
(c) mvr
11.
(b) mvl
(d) ZERO
Wires 1 and 2 carrying currents i1 and i2
respectively are inclined at an angle  to each
other. What is the force on a small element dl of
wire 2 at a distance r from wire 1 (as shown in
figure) due to the magnetic field of wire 1 ?
(a) zero
16.
13.
14.
15.
At a specific instant emission of radioactive
compound is deflected in a magnetic field. The
compound can emit:
(i) electrons
(ii) protons
2+
(iii) He
(iv) neutrons
The emission at the instant can be
(a) i, ii, iii
(b) i, ii, iii, iv
(c) iv
(d) ii, iii
Sodium and copper have work functions 2.3 eV
and 4.5 eV respectively. Then the ratio of the
wavelengths is nearest to:
(a) 1 : 2
(b) 4 : 1
(c) 2 : 1
(d) 1 : 4
Formation of covalent bonds in compounds
exhibits:
(a) wave nature of electron
(b) particle nature of electron
(c) both wave and particle nature of electron
(d) none of these
A conducting square loop of side L and resistance
R moves in its plane with a uniform velocity v
perpendicular to one of its sides. A magnetic
induction B constant in time and space, pointing
perpendicular and into the plane at the loop exists
everywhere with half the loop outside the field, as
shown in figure. The induced emf is:
(c)
vBL
R
(d) Vbl
In the nuclear fusion reaction,
H 21  H 31  42 H e  n
0

(a)
i1i2 dl tan  (b) 0 i1i2 dl sin 
2r
2r

0
(c)
i 1i 2dl (1  cos  ) (d) 0 i1i2 dl sin 
4 r
4r
12.
(b) RvB
given that the repulsive potential energy between the
two nuclei is – 7.7 x 10-14 J, the temperature at which
the gases must be heated to initiate the reaction is
nearly [Boltzmann’s constant k = 1.38 x 10-23 J/K]
(a) 107 K (b) 105 K
(c) 103 K
(d) 109 K
17.
Which of the following atoms has the lowest
ionization potential ?
(a)
18.
20.
21.
N
(b)
133
55
Cs
(d)
40
18
Ar
(d)
16
8
O
The wavelength involved in the spectrum of deuterium
 D
2
1
19.
14
7
are slightly different from that of hydrogen
spectrum, because :
(a) size of the two nuclei are different
(b) nuclear force are different in the two cases
(c) masses of the two nuclei are different
(d) attraction between the electron and the nucleus is
different in the two cases
In the middle of the depletion layer of reverse biased
p-n junction, the :
(a) electric field is zero
(b) potential is maximum,
(c) electric field is maximum
(d) potential is zero
If the binding energy of the electron in a hydrogen
atom is 13.6 eV, the energy required to remove the
electron from the first excited state of Li2+ is :
(a) 30.6 eV
(b) 13.6 eV
(c) 3.4 eV
(d) 122.4 eV
A body is moved along a straight line by a machine
delivering a constant power. The distance moved by
the body in time t is proportional to :
22.
23.
24.
(a) t3/4
(b) t3/2
(c) t1/4
(d) t1/2
A rocket with a lift-off mass 3.5 x 104 kg is blasted
upwards with an initial acceleration of 10 m/s2. Then
the initial thrust of the blast is :
(a) 3.5 x 105 N
(b) 7.0 x 105 N
(c) 14.0 x 105 N
(d) 1.75 x 105 N
To demonstrate the phenomenon of interference we
require two source which emit radiation of :
(a) nearly the same frequency
(b) the same frequency
(c) different wavelength
(d) the same frequency and having a definite phase
relationship
Three charges – q1, + q2 and – q3 are placed as shown
in the figure. The x-component of the force on –q1 is
proportional to :
26.
27.
28.
29.
30.
q 2 q3
(a) 2  3 cos θ
b
b
(c)
25.
q 2 q3

cos θ
b2 a2
q2 q3
(b) 2  2 sin θ
b
a
(d)
q2 q3
 sin θ
b2 a2
A 220 volt, 1000 volt bulb is connected across a 110
volt mains supply. The power consumed will be :
(a) 750 watt
(b) 500 watt
(c) 250 watt
(d) 1000 watt
The image formed by an objective of a compound
microscope is :
(a) virtual and diminished
(b) real and diminished
(c) real and enlarged
(d) virtual and enlarged
The earth radiates in the infra-red region of the
spectrum. The spectrum is correctly given by :
(a) Rayleigh Jeans law
(b) Planck’s law of radiation
(c) Stefan’s law of radiation
(d) Wien’s law
To get three images of a single object, one should have
two plane mirrors at an angle of :
(a) 600
(b) 900
(c) 1200
(d) 300
According to Newton’s law of cooling, the rate of
cooling of a body is proportional to (Δθ)n, where Δθ is
the difference of the temperature of the body and the
surroundings, and n is equal to :
(a) two
(b) three
(c) four
(d) one
The length of a given cylindrical wire is increased by
100%. Due to the consequent decrease in diameter the
change in the resistance of the wire will be :
(a) 200%
(b) 100%
(c) 50%
(d)300%