Home
Entrance Exams
Medical Entrance Exam
OTI365 - NEET 2022
NEET Physics - Properties of Bulk Matter Sample Questions

Properties of Bulk Matter

Exam Duration: 45 Mins Total Questions : 30

1 )

Two similar wires under the same load yield elongation of 0.1 nun and 0.05 nun respectively. If the area of cross-section of the first wire is 4 mm², then the area of cross-section of the second wire is:

(a)
6 mm²
(b)
8 mm²
(c)
10 mm²
(d)
12 mm²

2 )

Coefficient of linear expansion of brass and steel rods are \(\alpha _{ 1 }\) and \(\alpha _{ 2 }\) Lengths of brass and steel rods are l₁and l₂respectively. If (l₂- l₁) is maintained same at all temperatures, which one of the following relations holds good?

(a)
\({ \alpha }_{ 1 }{ l }_{ 2 }\)
(b)
\({ \alpha }_{ 1 }{ l }_{ 2 }={ a }_{ 2 }{ l }_{ 2 }\)
(c)
\({ a }_{ 2 }{ l }_{ 2 }={ a }_{ 1 }{ l }_{ 1 }\)
(d)
\({ a }_{ 1 }{ l }_{ 1 }={ a }_{ 2 }{ l }_{ 2 }\)

3 )

Find the density of a block of wood that floats in water with 0.1 of its volume above water:

(a)
0.9 g/cc
(b)
0.9
(c)
0.1 g/cc
(d)
0.1

4 )

Two solids A and B float in water. It is observed that A floats with half its volume immersed and B floats with 2/3 of its volume immersed. Compare the densities of A and B:

(a)
4 : 3
(b)
2 : 3
(c)
3 : 4
(d)
1 : 3

5 )

Viscosity of liquids:

(a)
increases with increase in temperature
(b)
is independent of temperature
(c)
decreases with decrease in temperature
(d)
decreases with increase in temperature

6 )

With increase in temperature the viscosity of:

(a)
both gases and liquids increases
(b)
both gases and liquids decreases
(c)
gases increases and liquids decreases
(d)
gases decreases and liquids increases

7 )

If the velocity of the fluid is the same at a given point at all times, then the flow is:

(a)
turbulent
(b)
rapid
(c)
viscous
(d)
stream-lined

8 )

A ball whose density is 0.4 x 10³ kg/m³ falls into water from a height of 9 cm. To what depth does the ball sink?

(a)
9 cm
(b)
6 cm
(c)
4.5 cm
(d)
2.25 cm

9 )

Find the lifting force of a 4 kg cork lifebelt in sea water, if the densities of cork and sea water are 0.2 x 10³ kg/m³ and 1.03 x 10³ kg/m³respectively:

(a)
163 N
(b)
273 N
(c)
119 N
(d)
289 N

10 )

An empty balloon weighs 1g. The balloon is filled with water to the neck and tied with a massless thread. The weight of balloon along with water is 101 g. The balloon filled with water is weighed when fully immersed. Then, its weight in water is:

(a)
1 g
(b)
101 g
(c)
201 g
(d)
51 g

11 )

A piece of ice is floating in ajar containing water. When the ice melts, the temperature of water falls from 4^o C to 1^oC. Then, the level of water?

(a)
rises
(b)
falls
(c)
unchanged
(d)
none of these

12 )

Once a submarine starts sinking, it will always sink to the bottom of the ocean if no other changes arc made. This is because during the descent of the submarine:

(a)
the buoyant force acting on it decreases
(b)
the hydrostatic pressure acting on it increases
(c)
the gravitational force acting on it increases
(d)
the density remains constant

13 )

Water contained in a tank flows through an orifice of diameter 2 cm, under a constant pressure difference of 10 cm of water column. The rate of flow of water through the orifice is:

(a)
44 cc/sec
(b)
4.4 cc/sec
(c)
440 cc/sec
(d)
4400 cc/sec

14 )

We have three beakers A, B and C containing glycerine, water and kerosene respectively. They are stirred vigorously and placed on a table. The liquid which comes to rest at the earliest is:

(a)
glycerine
(b)
water
(c)
kerosene
(d)
all of them at the same time

15 )

In areas far removed from the tanks, the water does not rise to desired heights. This is because the pressure falls due to:

(a)
gravity
(b)
density
(c)
surface tension
(d)
viscosity

16 )

A vessel of water is placed on the floor of an elevator. How does the pressure at the bottom of the vessel change if the elevator moves up with uniform acceleration a?

(a)
Increases by hpa
(b)
Decreases by hpa
(c)
No change in pressure
(d)
None of these

17 )

A ball floats on the surface of water in a container exposed to the atmosphere. Will the ball remain immersed at its former depth or will it sink or rise if the container is covered and the air is removed?

(a)
The ball sinks
(b)
The ball rises
(c)
The ball remains immersed at its former depth
(d)
It oscilIates

18 )

Stream-line flow is more likely for liquids with:

(a)
low density and low viscosity
(b)
high viscosity and high density
(c)
high viscosity and low density
(d)
low viscosity and high density

19 )

Why the dam of water reservoir is thick at the bottom?

(a)
Quantity of water increases with depth
(b)
Density of water increases with depth
(c)
Pressure of water increases with depth
(d)
Temperature of water increases with depth

20 )

A cylindrical, tank is filled with water to a level of 3 m. A hole is opened at a height of 52.5 cm from bottom. The ratio of the area of the hole to that of cross-sectional area of the cylinder is 0.1. Find the square of the velocity with which water is coming out: (g = 10m/sec²)

(a)
50 m²/sec²
(b)
40 m²/sec²
(c)
51.5 m²/sec²
(d)
50.5 m²/sec²

21 )

Aboat having a length of 5 m and breadth 1m is floating on a lake. If a man gets on to the boat, the boat sinks by 1 cm. The weight of the man is (Take g = 10m s^-2):

(a)
50 kg
(b)
9 kg
(c)
35 kg
(d)
75 kg

22 )

A sphere of mass M and radius R is dropped in a liquid, then terminal velocity of sphere is proportional to:

(a)
R
(b)
1/R
(c)
R²
(d)
1/R²

23 )

(A) To float, a body must displace liquid whose weight is greater than the actual weight of the body.
(R) The body will experience no net downward force, in the case of floating.

(a)
If both assertion and reason are true and reason is the correct explanation of assertion.
(b)
If both assertion and reason are true but reason is not the correct explanation of assertion.
(c)
If assertion is true but reason is false.
(d)
If both assertion and reason are false.
(e)
If assertion is false but reason is true.

24 )

Water is moving with a speed of 5.0 m/s through a pipe with cross-sectional area of 4.0 cm². The water gradually descends 10 m as the pipe increase in area to 8.0 cm². If the pressure at the upper level is 1.5 x 10⁵ Pa, the pressure at lower level will be :

(a)
2.8 x 10⁵ Pa
(b)
2.6 x 10⁵ Pa
(c)
2.4 x 10⁵ Pa
(d)
2.1 x 10⁵ Pa

25 )

(A) The stream of water flowing at high speed from a garden hose pipe tends to spread like a fountain when held vertically up, but tends to narrow down when held vertically down.
(R) In any steady flow of an incompressible fluid, the volume flow rate of the fluid remains constant.

(a)
If both assertion and reason are true and reason is the correct explanation of assertion
(b)
If both assertion and reason are true but reason is not the correct explanation of assertion
(c)
If assertion is true but reason is false
(d)
If both assertion and reason are false
(e)
If assertion is false but reason is true

26 )

(A) Railway tracks are laid on small sized wooden sleepers.
(R) Small sized wooden' sleepers are used so that train exert more pressure on the railway track. Due to which train does not leave the track.

(a)
If both assertion and reason are true and reason is the correct explanation of assertion
(b)
If both assertion and reason are true but reason is not the correct explanation of assertion
(c)
If assertion is true but reason is false
(d)
If both assertion and reason are false
(e)
If assertion is false but reason is true

27 )

(A) The stream of water emerging from a water tap "necks down" as it falls.
(R) The volume flow rate at different levels is same.

(a)
If both assertion and reason are true and reason is the correct explanation of assertion
(b)
If both assertion and reason are true but reason is not the correct explanation of assertion
(c)
If assertion is true but reason is false
(d)
If both assertion and reason are false
(e)
If assertion is false but reason is true

28 )

(A) The velocity increases, when water flowing in broader pipe enter a narrow pipe.
(R) According to equation of continuity, product of area and velocity is constant.

(a)
If both assertion and reason are true and reason is the correct explanation of assertion
(b)
If both assertion and reason are true but reason is not the correct explanation of assertion
(c)
If assertion is true but reason is false
(d)
If both assertion and reason are false
(e)
If assertion is false but reason is true

29 )

(A) Water flows faster than honey.
(R) The coefficient of viscosity of water is less than honey.

(a)
If both assertion and reason are true and reason is the correct explanation of assertion
(b)
If both assertion and reason are true but reason is not the correct explanation of assertion
(c)
If assertion is true but reason is false
(d)
If both assertion and reason are false
(e)
If assertion is false but reason is true

30 )

(A) Viscosity of liquid is the property of liquid by virtue of which it opposes the relative motion amongst its different layers.
(R) Viscosity of liquid increases rapidly with the rise of temperature.

(a)
If both assertion and reason are true and reason is the correct explanation of assertion
(b)
If both assertion and reason are true but reason is not the correct explanation of assertion
(c)
If assertion is true but reason is false
(d)
If both assertion and reason are false
(e)
If assertion is false but reason is true