Top NEET Coaching in Ranchi

बुद्धा साइन्स एंड टेक्निकल इंस्टीट्यूट
Buddha Science & Technical Institute
Kokar, Ranchi, Jharkhand
JOIN BSTI FOR : IIT-JEE / NEET With BHARAT SIR
PHYSICS : IMPORTANT QUESTION FOR IIT-JEE / NEET
Q. A constant volume air thermometer works on
A. Archemedes` principle
B. Boyle`s law
C. Pascal`s law
D. Gay Lussac`s law
ANS : D
V.V.I.
QUESTION

Q. Calorie is defined as the amount of heat required to raise
temperature of 1 g of water by 1˚C and it is defined under which of
the following conditions ?
A. From 14.5 ˚C to 15.5 ˚C at 760 mm of Hg
B. From 98.5 ˚C to 99.5 ˚C at 760 mm of Hg
C. From 13.5 ˚C to 14.5 ˚C at 76 mm of Hg
D. From 3.5 ˚C to 4.5 ˚C at 76 mm of Hg
ANS : A
V.V.I.
QUESTION

Q. Compared to burn due to air at 100 ˚C, a burn due to steam at 100
˚C is
A. More dangerous
B. Less dangerous
C. Equally dangerous
D. None of the above
ANS : A
V.V.I.
QUESTION

Q. In which of the following processes, convection does not take place
primarily?
A. Sea and land breeze
B. Boiling of water
C. Warming of glass of the bulb due to filament
D. Heating air around a furnace
ANS : C
V.V.I.
QUESTION

Q. An ideal black body at room temperature is thrown into a furnace.
It is observed that
A. Initially, it is the darkest body and at later times the brightest
B. It is the darkest body at all times
C. It can not be distinguished at all times
D. Initially, it is the darkest body and at later times it can not be
distinguished
ANS : A
V.V.I.
QUESTION

Q. Two spheres of same material have radii 1 m and 4 m and
temperatures 4,000 K and 2,000 K respectively. The energy
radiated per second by the first sphere is
A. Greater than that by the second
B. Less that by the second
C. Equal in both cases
D. The information is incomplete to draw any conclusion.
ANS : C
V.V.I.
QUESTION

Q. A sphere, a cube and a thin circular plate, all made of the same
material and having the same mass, are initially heated to a
temperature of 3,000˚C. Which of these will cool fastest?
A. Sphere B. Cube
C. Plate D. None of these
ANS : C
V.V.I.
QUESTION

Q. Heat given to a body, which raises its temperature by 1˚C is
A. Water equivalent
B. Temperature gradient
C. Thermal capacity
D. Specific heat
ANS : C
V.V.I.
QUESTION

Q. 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
ANS : D
V.V.I.
QUESTION

Q. A pressure cooker reduces cooking time for food, because
A. Heat is more evenly distributed in the cooking space
B. The higher pressure inside the cooker crushes the food material
C. Cooking involves chemical changes helped by a rise in temperature
D. Boiling point of water involved in cooking is increased
ANS : D
V.V.I.
QUESTION

Q. Which of the following is more close to a black body ?
A. Blackboard paint
B. Green leaves
C. Black holes
D. Red roses
ANS : A
V.V.I.
QUESTION

Q. The earth radiates in the infra-red region of the spectrum. The
spectrum is correctly given by
A. Planck`s law of radiation
B. Stefan`s law of radiation
C. Rayleigh jeans law
D. Wien`s law
ANS : D
V.V.I.
QUESTION

Q. A radiation of energy E falls normally on a perfectly reflecting
surface. The momentum transferred to the surface is
A. E / c
B. 2E / c
C. Ec
D. E / c2
ANS : B
V.V.I.
QUESTION

Q. Which one of the following processes depends on gravity?
A. Conduction
B. Convection
C. Radiation
D. None of these
ANS : B
V.V.I.
QUESTION

Q. In determining the temperature of a distant star, one makes use of
A. Kirchhoff`s law
B. Stefan`s law
C. Wien`s displacement law
D. None of the above
ANS : C
V.V.I.
QUESTION

Q. The wavelength of radiation emitted by a body depends upon
A. The nature of the surface
B. The area of the surface
C. The temperature of the surface
D. All of the above factors
ANS : C
V.V.I.
QUESTION

Q. We plot a graph, having temperature in ˚C on x-axis and in ˚F on y-
axis. If the graph is straight line, then it
A. Passes through origin
B. Intercepts the positive x-axis
C. Intercepts the positive y-axis
D. Intercepts the negative axis of both x-and y-axis
ANS : C
V.V.I.
QUESTION

Q. At a common temperature, a block of wood and a block of metal
feel equally cold or hot. The temperatures of block and wood are
A. Equal to the temperature of the body
B. Less than the temperature of the body
C. Greater than temperature of the body
D. Either (b) or (c)
ANS : A
V.V.I.
QUESTION

Q. A quantity of heat required to change the unit mass of a solid
substance, from solid state to liquid state, while the temperature
remains constant, is known as
A. Latent heat B. Sublimation
C. Hoar frost D. Latent heat of fusion
ANS : D
V.V.I.
QUESTION

Q. When a solid is converted into a gas, directly by heating, then this
process is known as
A. Boiling
B. Sublimation
C. Vaporization
D. Condensation
ANS : B
V.V.I.
QUESTION

Q. Calorimeters are made of which of the following ?
A. Glass
B. Metal
C. Wood
D. Either (a) or (c)
ANS : B
V.V.I.
QUESTION

Q. The bulb of one thermometer is spherical, while that of other is
cylindrical. If both of them have equal amount of mercury, which
one will respond quickly to the temperature?
A. Spherical B. Cylindrical
C. Elliptical D. Both (a) and (c)
ANS : B
V.V.I.
QUESTION

Q. On a cold morning, a metal surface will feel colder to touch than a
wooden surface, because
A. Metal has high specific heat
B. Metal has high thermal conductivity
C. Metal has low specific heat
D. Metal has low thermal conductivity
ANS : B
V.V.I.
QUESTION

Q. Woolen clothes keep the body warm, because wool
A. Is a bad conductor
B. Increases the temperature of body
C. Decreases the temperature
D. All of these
ANS : A
V.V.I.
QUESTION

Q. Heat travels through vacuum by
A. Conduction
B. Convection
C. Radiation
D. Both (a) and (b)
ANS : C
V.V.I.
QUESTION

Q. Ratio of the amount of heat radiation, transmitted through the
body to the amount of heat radiation incident on it, is known as
A. Conductance
B. Inductance
C. Transmittance
D. Absortance
ANS : C
V.V.I.
QUESTION

Q. If the amount of heat energy received per unit area from sun is
measured on earth, mars and jupiter, it will be
A. The same for all
B. In decreasing order jupiter, mars earth
C. In increasing order jupiter, mars, earth
D. In decreasing order mars, earth, jupiter
ANS : C
V.V.I.
QUESTION

Q. According to Wien`s displacement law
A. λT = constant
B. λ α 1 / T
C. λ / T = constant
D. Both (a) and (b)
ANS : D
V.V.I.
QUESTION

Q. On increasing the temperature of a substance gradually, its colour
becomes
A. Red
B. Green
C. Yellow
D. White
ANS : C
V.V.I.
QUESTION

Q. The latent heat of vaporization of a substance is always
A. Greater than its latent heat of fusion
B. Greater than its latent heat of sublimation
C. Equal to its latent heat of sublimation
D. Less than its latent heat of fusion
ANS : A
V.V.I.
QUESTION

Top NEET Coaching in Ranchi

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