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Test: Physics- 2

45 Questions MCQ Test NEET Mock Test Series | Test: Physics- 2

Description

This mock test of Test: Physics- 2 for NEET helps you for every NEET entrance exam. This contains 45 Multiple Choice Questions for NEET Test: Physics- 2 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Physics- 2 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this Test: Physics- 2 exercise for a better result in the exam. You can find other Test: Physics- 2 extra questions, long questions & short questions for NEET on EduRev as well by searching above.

QUESTION: 1

A liquid drop tends to have a spherical shape because

A. it has minimum surface energy
B. a sphere is the most symmetrical object
C. the viscosity does not allow it to spread out
D. the strong gravitational field of the earth does not allow it to have any other shape

Solution:

QUESTION: 2

A capillary tube of radius 1 mm is 10cm long. What maximum height of water it can hold if it is immersed in water upto 5cm and then taken out of it ? (Surface Tension of water = 98 dynes/cm)

A.
2 mm
B.
2 cm
C.
4 mm
D.
4 cm

Solution:

h = 2T/rdg
h = (2*98)/(0.005*1000*10)
= 196/50
= 3.92 cm
that is approximately equal to 4 cm.

QUESTION: 3

Ice floats in water contained in a vessel. When whole ice has melted, water temp. falls from . The water level will

A. first fall then rise
B. fall
C. rise
D. first rise then fall

Solution:

QUESTION: 4

A beaker is partly filled with water. The mass of beaker and its contents is 100 gm. A block of wood having volume 20 c.c and density 0.5

is floated in beaker. The mass of the beaker and its contents, as read by a balance, will be

A. 105 gm
B. 110 gm
C. 95 gm
D. 90 gm

Solution:

QUESTION: 5

A particle executes simple harmonic motion of amplitude A. At what distance from the mean position is its kinetic energy equal to its potential energy?

A.
A/2
B.
A/4
C.
D.

Solution:

QUESTION: 6

Two soap bubbles of radii 4 mm & 6 mm are kept in contact. What is the radius of curvature at the junction of bubbles.

A. 5 mm
B. 4 mm
C. 6 mm
D. none

Solution:

QUESTION: 7

The time period of a simple pendulum with effective length equal to the radius of Earth (R) will be (g is acceleration due to gravity at the surface of earth)

A.
B.
C.
D.
infinite

Solution: When length is comparable to radius then T=2pi root under R/g(1+R/l) so if R=l then the ans would be C.

QUESTION: 8

When water droplets merge to form a bigger drop

A. energy is liberated
B. energy is absorbed
C. energy is neither liberated nor absorbed
D. energy may either be liberated or absorbed depending on the nature of the liquid.

Solution:

QUESTION: 9

Which of the following quantities is always negative in a S.H.M.

A.
B.
C.
D. both 2 & 3

Solution:

QUESTION: 10

For the wave represented by the equation y = 3cos

cm the wave velocity and the maximum particle velocity are

A. equal
B. 100cm/s & 300cm/s
C.
D.

Solution:

QUESTION: 11

Figure shows a capillary tube of radius r dipped into water. If the atmospheric pressure is

the pressure at point A is

Solution:

QUESTION: 12

Ultrasonic waves emitted by dolphins have a frequency of 250 kHz. Their wavelength in water is nearly

A. 5.76 mm
B. 5.76 cm
C. 1.3 mm
D. None

Solution:

QUESTION: 13

The ratio of velocity of sound through a gas to the r.m.s. velocity of the gas molecules is ----------

Solution:

QUESTION: 14

The angular frequency of motion whose equation is given by is (y = displacement and t= time)

A.
9/4
B.
4/9
C.
3/2
D.
2/3

Solution:

QUESTION: 15

Match list I & list II & select the correct answer given below:

A. A-S, B-R, C-Q, D-P
B. A-P, B-Q, C-R, D-S
C. A-Q, B-P, C-S, D-R
D. A-S, B-R, C-P, D-Q

Solution:

QUESTION: 16

In a stationary wave

I. all the particles perform simple harmonic motion

II. all the particles between two adjacent nodes vibrate in phase

III. the amplitude of particle vibration at an antinode is equal to that of either component wave

IV. particles on opposite sides of a node vibrate with a phase difference of

A. only IV is correct
B. I and III are correct
C. II and IV are correct
D. I, II , III, IV are correct

Solution:

QUESTION: 17

The M.I. of a disc of mass M and radius R about an axis, which is tangential to the circumference of the disc and parallel to its diameter is

Solution:

QUESTION: 18

The M.I. of a body (initially at rest) about a given axis is 1.2

In order to produce a rotational K.E. of 1500 J, an angular acceleration of 25

must be applied about that axis for a period of

A. 8 sec
B. 2 sec
C. 1 sec
D. 10 sec

Solution:

QUESTION: 19

The centre of a wheel rolling on a plane surface moves with a speed

. A particle on the rim of the wheel at the same level as the centre will be moving at speed

A. zero
B.
C.
D. 2

Solution:

QUESTION: 20

Three identical rods, each of length l are joined to form a rigid equilateral triangle. Its radius of gyration about an axis passing through a corner and perpendicular to the plane of the triangle is

A.
l/2
B.
C.
D.

Solution:

QUESTION: 21

The velocity of a solid sphere after rolling down an inclined plane of height h, from rest, without sliding is

Solution:

QUESTION: 22

A solid sphere rolls without slipping down a 300(from horizontal) incline plane. Its linear acceleration will be

A. 5g/14
B. 2g/3
C. g/2
D. g/3

Solution:

QUESTION: 23

A planet moves around the sun. At a point P it is closest from the sun at a distance d₁ and has a speed V1. At another point Q, when it is farthest from the sun at a distance d₂, its speed will be

A.

d₁²v₁/d₂²
B.
d₂V₁/d₁
C.
d₁V₁/d₂
D.
d₂²V₁/d₁²

Solution:

QUESTION: 24

The earth retains its atmosphere because

A. The earth is sphere
B. The earth has population
C. The escape velocity < the mean speed of molecules
D. The escape velocity > the mean speed of molecules

Solution:

QUESTION: 25

A solid sphere rolls without slipping and presses a spring of spring constant ‘K’ as in fig. at the moment shown a spring was in relaxed state then the maximum compression in the spring will be

Solution:

QUESTION: 26

A particle of mass m = 5 unit is moving with a uniform speed

unit in the XOY plane along the line Y=X+4. The magnitude of the angular momentum about origin is:

A. Zero
B. 60 units
C. 7.5 units
D. units

Solution: Y=x+4 , x-y-4=0So,perpendicular distance from the ... moreorigin =4/square root of(1^2+1^2) , =4/square root of 2 now using the law of angular momentum =mvr=5×4/square root of 2×3×square root of 2=60 units.

QUESTION: 27

If the earth is at one forth of its present distance from the sun, the duration of the year will be

A. 1/2 of present year
B. 1/8 of present year
C. 1/4 of present year
D. 1/6 of present year

Solution:

QUESTION: 28

A wheel of M. I.

is making 10 revolution per second. It is stopped in 20 Second. Then angular retardation is

Solution:

QUESTION: 29

We have two sphere one of which is hollow and the other is solid. They have identical masses and moment of inertia about their respective diameter. The ratio of their radii is

A. 5 : 3
B.
C.
D. 1 : 1

Solution:

QUESTION: 30

When a ceiling fan is switched off, its angular velocity falls to half while it makes 36 rotations. How many more rotations will it make before coming to rest if the angular retardation is assumed uniform ?

A.
12
B.
18
C.
24
D.
36

Solution:

QUESTION: 31

A wheel whose moment of inertia is 12

has an initial angular velocity of 40 rad/s. A constant torque of 20 NM acts on the wheel. The time in which the wheel is accelerated to 100 rad/s is

A. 64 sec
B. 16 sec
C. 8 sec
D. 36 sec

Solution:

QUESTION: 32

The M.I. of a solid sphere of mass M and radius R about an axis at a distance 2R from centre is

Solution:

QUESTION: 33

A reversible engine Converts one-sixth of the heat input into work. When the temperature of the sink is reduced by

the efficiency of the engine is doubled. The temperature of source and sink are

Solution:

QUESTION: 34

Two liquids A and B are

and

. When mixed in equal masses the temperature of the mixture is found to be

. Their specific heats are in the ratio of

A. 3 : 2
B. 2 : 3
C. 1 : 1
D. 4 : 3

Solution:

QUESTION: 35

Which of the following is not a postulate of kinetic theory of gases ?

A. All gases are composed of molecules. Molecules of one gas are different from that of others
B. The molecules are mere point masses
C. The molecules are not always in motion
D. The molecules are perfectly elastic spheres

Solution:

QUESTION: 36

Certain perfect gas is found to obey PV^3/2 = constant during an adiabatic process. If such a gas at initial temperature T is adiabatically compressed to half the initial volume, its final temperature will be

A.
√2 T
B.
2 T
C.
2√2 T
D.
4 T

Solution:

QUESTION: 37

The first law of thermodynamics is concerned with the conservation of

A. number of molecules
B. energy
C. number of moles
D. temperature

Solution: 1st law concerned with heat energy bcoz energy neither be created nor be destroyed so it's only true with energy.

QUESTION: 38

For hydrogen the temperature and volume are related to each other according to the relation

When the gas undergoes an adiabatic process and changes from thermodynamic state 1 to 2, the value of x is

A. 0.3
B. 0.4
C. 0.5
D. 0.6

Solution:

QUESTION: 39

The colour of a star is an indication of its

A. weight
B. distance
C. temperature
D. size

Solution:

QUESTION: 40

A given mass of a gas expands from the state A to the state B by three paths 1, 2 and 3 as shown in the figure.

respectively be the work done by the gas along the three paths then

Solution:

QUESTION: 41

An engineer claims to have made an engine delivering 10 kW power with fuel consumption of 1 gm/sec. The calorific value of fuel is 2 k cal/gm. This claim is

A. valid
B. invalid
C. dependent on load
D. dependent on engine design

Solution:

QUESTION: 42

A thermometer has wrong calibration (of course at equal distances and the capillary is of uniform diameter). It reads the melting point of ice as

. It reads

in place of

. The temperature of boiling point of water on this scale is

Solution:

QUESTION: 43

If the

for the solar radiation is

then the temperature of the surface of the photosphere of the sun will be

A. 6800 K
B.
C. 68000 K
D. None

Solution:

QUESTION: 44

Two rods of same length and material transfer a given amount of heat in 12 s, when they are joined in series. But when they are joined in parallel, they will transfer same heat in same conditions in

A. 24 s
B. 3 s
C. 48 s
D. 1.5 s

Solution:

QUESTION: 45

What will be the ratio of energy liberated when two bodies one at

and other at

are kept in surroundings at

A. 2/1
B. 1/4
C. 1/2
D. None

Solution:

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Test: Physics- 2

45 Questions MCQ Test NEET Mock Test Series | Test: Physics- 2

A liquid drop tends to have a spherical shape because

A capillary tube of radius 1 mm is 10cm long. What maximum height of water it can hold if it is immersed in water upto 5cm and then taken out of it ? (Surface Tension of water = 98 dynes/cm)

Ice floats in water contained in a vessel. When whole ice has melted, water temp. falls from . The water level will

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