Que- The layer of atmosphere used for radio-wave transmission is
a. Chromosphere
b. Troposphere
c. Ionosphere
d. Stratosphere
Answer- Ionosphere
Que- What frequency range is the high frequency band?
a. 3 kHz
b. 3 to 30 MHz
c. 30 to 300 MHz
d. 10 GHz
Answer- 3 to 30 MHz
Que- In an optical fibre the signal is transmitted
a. In a straight line path
b. In a curved path
c. Due to total internal reflection
d. Due to refraction
Answer- Due to total internal reflection
Que- A real gas can act as an ideal gas in
a. High pressure and low temperature
b. Low pressure and high temperature
c. High pressure and high temperature
d. Low pressure and low temperature
Answer- Low pressure and high temperature
Que- The instrument that measures and records the relative humidity of air is
a. Hydrometer
b. Hygrometer
c. Lactometer
d. Barometer
Answer- Hygrometer
Que- If there is a circular hole in a metal plate, what happens to the radius of the hole when the plate is heated?
a. Increases
b. Decreases
c. Unchanged
d. Depends upon the metal
Answer- Increases
Que- Which of the following device is best suited for measuring the temperature inside metallurgical furnaces?
a. Pyrometer
b. Thermocouple
c. Thermometer
d. Thermistor
Answer- Pyrometer
Que- Skids occur when the brakes are applied so hard that the front or rear wheels lose traction are called as
a. Cornering
b. Blowout
c. Power
d. Braking
Answer- Braking
Que- During the motion of a projectile fired from the earth surface, ________
a. Its kinetic energy remains constant
b. Its momentum remains constant
c. Vertical component of its velocity remains constant
d. Horizontal component of its velocity remains constant
Answer- Horizontal component of its velocity remains constant
Que- What property of matter is momentum related to?
a. Mass
b. Velocity
c. Both A & B
d. None of the above
Answer- Both A & B
Que- The swing of a spinning cricket ball in air can be explained on the basis of
a. Sudden change in wind direction.
b. Buoyancy of air.
c. Turbulence caused by wind.
d. Bernoulli's theorem.
Answer- Turbulence caused by wind.
Que- What will happen if an object is dropped from a height and there is no air resistance?
a. It will fall with a constant speed and acceleration
b. Its acceleration will increase
c. Both speed and acceleration will increase
d. Its speed will increase
Answer- Its speed will increase
Que- Heat flows as a result of difference of ________
a. Temperature
b. Density
c. Mass
d. Volume
Answer- Temperature
Que- Light beam which is highly directional is called:
a. Eraser
b. Grazer
c. Maser
d. Laser
Answer- Laser
Que- Speed of light is maximum in ________
a. Vacuum
b. Solids
c. Liquids
d. Gases
Answer- Vacuum
Que- Light travels in a straight line (rectilinear propagation of light). This statement does hold if the medium of travel for light is
a. Of variable refractive index
b. Made up of slabs of different refractive indices
c. Homogeneous and transparent
d. Inhomogeneous and transparent
Answer- Homogeneous and transparent
Que- The speed of light will be minimum while passing through
a. Water
b. Vaccum
c. Air
d. Glass
Answer- Glass
Que- Who among the following is credited for the Corpuscular theory of light?
a. Isaac Newton
b. Christiaan Hyugens
c. Albert Einstein
d. James Clerk Maxwell
Answer- Isaac Newton
Que- The word "Physics" comes from the Greek word
a. Phiji
b. Fusis
c. Phusik
d. None of the above
Answer- Fusis
Que- Which of the following events occurred first ?
a. Albert Einstein propounded the General Theory of Relativity
b. Max Planck unveiled the Quantum Theory
c. Marconi first tranmitted a wireless signal
d. Madame Marie Curie became the first woman Nobel Prize winner
Answer- Max Planck unveiled the Quantum Theory
Que- Who among the following is credited to work for the unification of electricity, magnetism and optics field of Physics?
a. James Clerk Maxwell
b. Michael Faraday
c. Haris Christian Oersted
d. Isaac Newton
Answer- James Clerk Maxwell
Que- What is the range of masses involved in the study of Physics?
a. 10-19 kg to 1038 kg
b. 10-30 kg to 1055 kg
c. 10-30 kg to 1030 kg
d. 10-19 kg to 1055 kg
Answer- 10-30 kg to 1055 kg
Que- The mass of a star is two times the mass of the Sun. How it will come to an end ?
a. Neutron Star
b. Black hole
c. White Dwarf
d. Red Giant
Answer- Neutron Star
Que- Which of the following celestial bodies contains abundant quantities of helium-3, a potential source of energy ?
a. Earth
b. Moon
c. Venus
d. Saturn
Answer- Moon
Que- The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be:
a. 8 T
b. 4 T
c. 1 T
d. 2 T
Answer- 8 T
Que- Which is evidence that supports the dynamo theory?
a. Earth's outer core contains liquid that conducts electricity
b. Earth's core contains a large amount of iron
c. Granite and basalt conduct electricity
d. Convection occurs in Earth's inner core
Answer- Earth's core contains a large amount of iron
Que- Which of the following is indicated by the colour of a star ?
a. Weight
b. Distance
c. Temperature
d. Size
Answer- Temperature
Que- When a card placed over a tumbler is flicked with the finger, the coin placed over it falls in the tumbler.
a. Law of conservation of energy
b. Newton's third law of motion
c. Law of Inertia
d. Law of conservation of momentum
Answer- Law of Inertia
Que- According to the Second Law of Motion, for a given force, acceleration is inversely proportional to the ________ of an object.
a. Density
b. Volume
c. Force
d. Mass
Answer- Mass
Que- Why does a cannon recoil after firing ?
a. Conservation of energy
b. Backward thrust of gases produced
c. Newton's third law of motion
d. Newton's first law of motion
Answer- Newton's third law of motion
Que- A body of mass 5 kg accelerates from 12 m/s to 20 m/s in 4 seconds due to the application of a force on it. Calculate the magnitude of this force (in N).
a. 40
b. 10
c. 20
d. 80
Answer- 10
Que- Which one of the following processes is responsible for the glittering of air bubble rising through water?
a. Reflection of light
b. Refraction of light
c. Total internal reflection of light
d. Scattering of light
Answer- Total internal reflection of light
Que- The increasing order of the refractive index of certain materials is (left to right) ________
a. Rocksalt, Benzene, Kerosene, Ice
b. Rock Salt, Ice, Benzene, Kerosene
c. Ice, Kerosene, Benzene, Rock Salt
d. Kerosene, Ice, Benzene, Rock Salt
Answer- Ice, Kerosene, Benzene, Rock Salt
Que- Which color deviates least when passing through a Prism
a. Blue
b. Green
c. Yellow
d. Red
Answer- Red
Que- Which color deviates highest when passing through a Prism
a. Indigo
b. Green
c. Violet
d. Orange
Answer- Violet
Que- A pond of water appears less deep due to
a. Reflection
b. Diffraction
c. Refraction
d. Polarisation
Answer- Refraction
Que- A mirage occurs because of
a. Reflection by hot ground
b. Total internal reflection by layers of air
c. Interference of light
d. Diffraction of light
Answer- Total internal reflection by layers of air
Que- Optical fibres are based on the phenomenon of
a. Interference
b. Dispersion
c. Diffraction
d. Total Internal Reflection
Answer- Total Internal Reflection
Que- The angle between the ________ and the incident ray is called the angle of incidence.
a. Surface
b. Normal
c. Tangent
d. Reflected ray
Answer- Normal
Que- A periscope works by the principle of
a. Total internal reflection
b. Refraction
c. Diffraction
d. Reflection
Answer- Total internal reflection
Que- A periscope works on the principle of
a. Refraction
b. Total internal reflection
c. Diffraction
d. Reflection
Answer- Total internal reflection
Que- Why is it difficult to breathe at higher altitudes?
a. Due to low air pressure
b. Due to low temperature
c. Due to ozone
d. Due to high humidity
Answer- Due to low air pressure
Que- The Hydraulic Break works on the principle of ________ .
a. Pascal's Law
b. Boyle's law
c. Coulomb's law
d. Bernouli's law
Answer- Pascal's Law
Que- Hydraulic brakes work on the principle of
a. Thomson's law
b. Newton's law
c. Bernoulli's theorem
d. Pascal's law
Answer- Pascal's law
Que- What principle/law explains the working of the hydraulic brakes in automobiles ?
a. Bernoulli's law
b. Posieulle's principle
c. Pascal's law
d. Archimedes' principle
Answer- Pascal's law
Que- Air moves from the region where the air ________
a. Humidity is high to the region where the humidity is low
b. Pressure is low to the region where the pressure is high
c. Pressure is high to the region where the pressure is low
d. Humidity is low to the region where the humidity is high
Answer- Pressure is high to the region where the pressure is low
Que- What is the SI unit of intensity of sound?
a. Decibel
b. Newton
c. Heartz
d. Tesla
Answer- Decibel
Que- Sound cannot pass through
a. Water
b. Steel
c. Air
d. Vacuum
Answer- Vacuum
Que- Sound waves cannot travel in
a. Vacuum
b. Water
c. Glass
d. Hydrogen gas
Answer- Vacuum
Que- The quality or tone of a musical sound produced by a stringed instrument depends on
a. Frequency of vibration
b. Length of the strings in the instrument
c. Amplitude of vibration
d. Wave form of the sound
Answer- Wave form of the sound
Que- Which determines the frequency of a sound wave?
a. Amplitude
b. Speed
c. Source
d. Medium
Answer- Amplitude
Que- Which is an example of Phototropism?
a. Roots of a plant following water
b. Plant bending toward the light
c. Roots growing into the soil
d. A venus flytrap capturing a fly
Answer- Plant bending toward the light
Que- Light travels fastest in
a. Air
b. Water
c. Glass
d. Diamond
Answer- Air
Que- Light travels slowest in
a. Glass
b. Water
c. Air
d. Vacuum
Answer- Glass
Que- An image formed by a plane mirror, that cannot be obtained on a screen is called ________
a. Virtual image
b. Real image
c. Inverted image
d. Erect image
Answer- Virtual image
Que- The type of mirror used in automobiles to see the traffic on the rear side is
a. Concave
b. Plano-Convex
c. Plane
d. Convex
Answer- Convex
Que- If you look into a mirror and find that the image (your reflection) is smaller than you, then the type of the mirror is:
a. Concave mirror
b. Convex mirror
c. Plano-concave mirror
d. Plane mirror
Answer- Convex mirror
Que- Which one of the following reflects back more sunlight as compared to other three?
a. Sand desert
b. Land covered with fresh snow
c. Prairie land
d. Paddy crop land
Answer- Land covered with fresh snow
Que- After reflection from a plane mirror the word will look like.
a. AMBULANCE
b. ECNALUBMA
c. AMBULA CE
d. AWBULANCE
Answer- ECNALUBMA
Que- Convex mirror is generally used in ________
a. Solar cookers
b. Opthalmoscope
c. Reflector for head light
d. Rear view mirror
Answer- Rear view mirror
Que- Which physical quantity is measured in 'siemens'?
a. Electric potential
b. Electrical conductance
c. Magnetic flux
d. Refractive index
Answer- Electrical conductance
Que- Hydroscope is an instrument that shows changes in:
a. Sound under water
b. Atmospheric humidity
c. Density of liquid
d. None of these
Answer- None of these
Que- Unit of impedance is ________
a. Ohm
b. Henry
c. Tesla
d. Hertz
Answer- Ohm
Que- Stress can be defined as ________ quantity.
a. Scalar
b. Vector
c. Phasor
d. Tensor
Answer- Tensor
Que- In spherical polar coordinates (l, q, a), q denotes the polar angle around z-axis and a denotes the azimuthal angle raised from x-axis . Then the y-component of P is given by
a. Psinq sina
b. Psinq cosa
c. Pcosq sina
d. Pcosq cosa
Answer- Psinq sina
Que- Which sources produce alternating current (AC)?
a. Solar power plants
b. Hydro-electric generators
c. Batteries
d. All of the above
Answer- Hydro-electric generators
Que- Alternating current is converted into direct current by a
a. Transformer
b. Dynamo
c. Oscillator
d. Rectifier
Answer- Rectifier
Que- A parallel-plate capacitor,with air in between the plates, has capacitance C. Now the space between the two plates of the capacitor is filled with a dielectric of dielectric constant 7. Then the value of the capacitance will become
a. C
b. C/7
c. 7C
d. 14C
Answer- 7C
Que- A parallel-plate capacitor of capacitance C1 is made using two gold plates. Another parallel-plate capacitor of capacitance C2 is made using two aluminium plates with same plate separation, and all the four plates are of same area. If rg and ra are respectively the electrical resistivities of gold and aluminium, then which one of the following relations is correct?
a. C1>C2
b. C2>C1
c. C1pa = C2pg
d. C1 = C2
Answer- C1 = C2
Que- Two vectors are said to be equal if
a. Only their magnitudes are same
b. Only their directions are same
c. Both magnitude and direction are same
d. Magnitudes are same but directions are opposite
Answer- Both magnitude and direction are same
Que- Which of the following is a vector quantity?
a. Area
b. Power
c. Electric Current
d. Energy
Answer- Area
Que- Which of the following is not a vector quantity?
a. Acceleration
b. Density
c. Displacement
d. Impulse
Answer- Density
Que- Which of the following is not a vector quantity ?
a. Speed
b. Velocity
c. Torque
d. Displacement
Answer- Speed
Que- These waves cannot be transmitted through vacuum.
a. Light
b. Sound
c. Heat
d. Electromagnetic
Answer- Sound
Que- The snow on the mountains does not melt all at once when it is heated by the sun because:
a. It becomes very hard
b. It reflects most of the heat from the sun
c. It has a low specific heat capacity
d. It has a high latent heat of fusion
Answer- It reflects most of the heat from the sun
Que- Cloudy nights are warmer compared to clear cloudless nights, because clouds mainly
a. Absorb heat from the atmosphere send it towards earth
b. Prevent cold waves from the sky descending on earth
c. Reflect back the heat given by earth
d. Produce heat and radiate it toward earth
Answer- Reflect back the heat given by earth
Que- In which one of the following the phenomenon of total internal reflection of light is used ?
a. Formation of mirage
b. Working of binoculars
c. Formation of rainbow
d. Twinkling of stars
Answer- Formation of mirage
Que- Which type of mirror is used in the head lights of vehicles ?
a. Plane mirror
b. Concave mirror
c. Convex mirror
d. Parabolic mirror
Answer- Concave mirror
Que- If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used?
a. Concave
b. Convex
c. Cylindrical
d. Plane
Answer- Concave
Que- Radioactive elements can be traced out in living cell through a technique called
a. Centrifugation
b. Chromatography
c. Auto radiography
d. All the above
Answer- Auto radiography
Que- The radiant energy having lowest energy is
a. Gamma rays
b. UV rays
c. Visible light
d. Microwave radiation
Answer- Microwave radiation
Que- The mercury and sodium street lamps light up because of :
a. Atomic emission
b. Atomic absorption
c. Electron emission
d. Electron absorption
Answer- Atomic emission
Que- Nuclear Reactors are based on which of the following phenomenon?
a. Magnetic confinement of Plasma
b. Nuclear Fusion
c. Controlled Nuclear Fission
d. None of the above
Answer- Controlled Nuclear Fission
Que- Which type of radiation has the lowest penetrating ability?
a. Alpha
b. Beta
c. Gamma
d. All of the above
Answer- Alpha
Que- ________ states that internal energy is a function of state and the increase in internal energy is equal to the sum of the heat supplied to system and work done by the system.
a. First law of thermodynamics
b. Hooke's Law
c. The coulomb's law
d. Faraday's Law
Answer- First law of thermodynamics
Que- Which phase change is an example of an exothermic process?
a. Liquid to Solid
b. Gas to Solid
c. Gas to Liquid
d. All the above
Answer- All the above
Que- The velocity of heat radiation in vacuum is
a. Equal to that of light
b. Less than that of light
c. Greater than that of light
d. Equal to that of sound
Answer- Equal to that of light
Que- In a Carnot engine when heat is taken from the source, its temperature
a. Remains constant
b. Decreases
c. Increases
d. Decreases and then remains constant
Answer- Remains constant
Que- Even after sunset, the air near the Earth's surface continue to receive heat due to
a. Insolation
b. Terrestrial Radiation
c. Conduction
d. Convection
Answer- Terrestrial Radiation
Que- A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct ?
a. Both the spheres will reach the ground simultaneously.
b. A will reach the ground first.
c. B will reach the ground first.
d. The question is incomplete because the masses of the spheres are not given.
Answer- Both the spheres will reach the ground simultaneously.
Que- Two stones of unequal masses are thrown vertically up with the same velocity. Which of the following will happen?
a. The heavier mass will reach greater height
b. The lighter mass will reach greater height
c. Both will reach the same height
d. Any of them may reach greater height
Answer- Both will reach the same height
Que- The dimension of which of the following is the same as that of impulse ?
a. Volume
b. Momentum
c. Torque
d. Change in the rate of momentum
Answer- Momentum
Que- An object covers distance which is directly proportional to the square of the time. Its accelaration is
a. Increasing
b. Decreasing
c. Zero
d. Constant
Answer- Constant
Que- The velocity of sound in moist air is more than in dry air because the moist air has
a. Less density than dry air.
b. Less pressure than dry air.
c. More pressure than dry air.
d. More density than dry air.
Answer- Less density than dry air.
Que- Which one among the following doesn't have any effect on velocity of sound ?
a. Pressure
b. Temperature
c. Humidity
d. Density
Answer- Humidity
Que- Velocity of sound in air does not change with the change of
a. Temperature of air
b. Pressure of air
c. Moisture content in air
d. Wind in the direction of propagation of sound
Answer- Pressure of air
Que- The propagation of sound waves in a gas involves
a. Adiabatic compression and rarefaction
b. Isothermal compression and rarefaction
c. Isochoric compression and rarefaction
d. Isobaric compression and rarefaction
Answer- Adiabatic compression and rarefaction
Que- When two similar sources vibrate with slightly different frequencies, a regular rise and fall occurs in the loudness of tone. This phenomenon is known as
a. Doppler effect
b. Beats
c. Resonance
d. Echo
Answer- Beats
Que- The oil in the wick of lamp rises due to
a. Pressure difference
b. Phenomenon of capillarity
c. Low viscosity of oil
d. Force of cohesion
Answer- Phenomenon of capillarity
Que- Which of the following devices can be used to detect radiant heat ?
a. Liquid thermometer
b. Six's maximum and minimum thermometer
c. Constant volume air thermometer
d. Thermopile
Answer- Thermopile