Which of the following is not the consequence of the 'special theory of relativity'?
Mass is condensed in the form of energy
Energy is conserved
Mass can be annihilated
Which of the following is the pure form of a semiconductor?
Intrinsic
Extrinsic
Both of these
Weightlessness in an orbiting spacecraft is physically identical to what?
Free fall
Velocity vector
Force of gravity
The location of the center of mass remains unchanged in which of the following?
Rotary motion
Translatory motion
Oscillatory motion
What is the device used to measure very high temperatures called?
Pyrometer
Bolometer
Calorimeter
What is the Decibel a unit of?
Sound loudness
Intensity of light
Energy of radiation
The International System of Units (SI) defines how many base units?
Seven
Twelve
Fourteen
What is the number of planets in our Solar system?
8
7
9
The total energy of the universe is which of the following?
Constant
Increases
Decreases
What does the gravitational mass of a body not depend on?
Volume
Gravitational constant G
Mass
Which of the following has the lower wavelength?
Cosmic rays
X-ray
Gamma ray
What kind of waves allow light to travel in a vacuum?
Electromagnetic waves
Mechanical waves
None of these
What determines the half life of radioactive elements?
The emissions of ionizing particles
Mass number
Atomic number
Which of the following units is a unit of energy?
Joule
Pascal
Tesla
The maximum force of friction is called what?
Limiting friction
Static friction
Dynamic friction
What is a solid that is transparent to light but possesses low melting point formed by?
Van der Waal bonds
Ionic bonds
Covalent bonds
What causes reverberation?
Reflection
Refraction
Diffraction
Wave particle duality of matter suggests that it is not possible to measure the time interval with certainty simultaneously with what?
Energy
Location
Mass
If a star is moving towards Earth, what color will the spectral lines appear?
Blue
Red
Green
If both the length and radius of a wire are doubled, what happens to its modulus of elasticity?
It remains unchanged
It is doubled
It is reduced to one fourth
Who proposed the hypothesis regarding the dual nature of material particles?
De Broglie
Davison
Heisenberg
The dimensional formula for the modulus of elasticity is same as that for:
Stress
Strain
Velocity
A gun is fired and it recoils back with a force. This event is best explained using which of Newton's laws?
Third
Second
First
What is the device employed to measure the diameter of the stars in our galaxy called?
Interferometer
Barometer
Viscometer
What happens when a nucleus splits?
Radiation is released
A chemical reaction occurs
A nucleus is destroyed
Who proposed the general theory of relativity?
Albert Einstein
Isaac Newton
Franz Wegner
Why do we not use X-rays in radar?
They are not reflected by the target
Their speed is low
They can damage the target
Why do diamonds shine so brightly?
Because of the total internal reflection of light
Because of the reflection of the environment
Because of the refraction of light
What is a coulomb a unit of?
Electric charge
Electric current
Electric field
Which of the following is essential for observing diffraction?
A narrow slit
Two coherent sources
A screen
Which planet has the maximum number of satellites?
Jupiter
Uranus
Mars
What is the nearest planet to Earth?
Venus
Mars
Mercury
The pitch of frequency of a police siren coming at you appears to be increasing because of what effect?
Doppler's effect
Big-bang theory
Charles's law
What device is used to measure atmospheric pressure?
Barometer
Hygrometer
Pyrometer
How are energy and power related?
Power is the rate of energy generated or used
Energy is the rate of power generated or used
Energy is measured in Watts
When a photon collides with an electron which of the following characteristics of the photon increases?
Wavelength
Energy
Frequency
What does mobility of a liquid decrease with?
An increase in viscosity
A decrease in viscosity
A decrease in surface tension
What is the bulk modulus of a perfectly rigid body?
Infinity
Zero
One
If a liquid is stirred, it ultimately comes to rest due to what?
Viscosity
Inertia
Surface tension
When we speak into a microphone, what type of vibration does the diaphragm execute?
Forced
Free
Resonant
Which of the following is not the property of a covalent crystal?
High melting point
Good conductor
High latent heat of fusion
The law of the conservation of linear momentum is the outcome of which of Newton's laws?
Second and third
First and second
First and third
What does the helium atom not contain?
Six nucleons
Two protons
Two electrons
Which scientist was awarded the Nobel Prize for both Physics and Chemistry?
Madam Marie Curie
Isaac Newton
Albert Einstein
The coil of an electric heater is made of which metal or alloy?
Nichrome
Copper
Aluminum
Which scientific principle best demonstrates why an object floats in a liquid that is denser than itself?
Archimedes Principle
Boyles Law
Upwards Thrust Principle
An echo is produced by sound waves due to what?
The reflection of sound
The scattering of sound
The refraction of sound
What is the maximum frequency of X-rays determined by?
Potential difference across cathode and anti cathode
Filament current
Filament potential
Which of the following is an example of a covalent crystal?
Diamond
Paraffin
Sodium chloride
Which of the following can produce a virtual image larger in size than the object?
Convex lens
Concave lens
Convexo concave lens
What is the nature of the wave associated with a parallel beam of light?
Plane
Spherical
Elliptical
A bullet is embedded in a solid block laying on a frictionless surface. What is conserved?
Momentum
Kinetic energy
Both momentum and kinetic energy
Orbital velocity is independent of what?
Mass of the satellite
Radius of the orbit
Mass of the planet
When a body rotates in a circular path about a line, the line can be described as what?
Axis of rotation
Axis of motion
Plan of rotation
According to the modern theory of the nature of light, what does light exhibit?
Both wave and particle nature
Wave nature only
Neither particle nor wave nature
What is the conductivity of a super conductor?
Infinite
Very large
Very low
Which constant is associated with a body moving in circular motion with constant speed?
Constant kinetic energy
Constant velocity
Constant displacement
What is the highest frequency in the range of human hearing?
20,000Hz
2000Hz
2000kHz
What is the S.I. unit of temperature?
Kelvin
Degree Celsius
Celsius
The energy of a spring in a watch is an example of what?
Potential energy
Kinetic energy
Mechanical energy
Who proposed the wave theory of light?
Huygens
Newton
Maxwell
Which of the following stars is nearest to the Sun?
Alpha Centauri
Sirius
Procyon
What does the coherence of two light sources imply about the light waves emitted by each?
Constant phase difference
The same frequency
The same intensity
When a stone is dropped on surface of still water, the waves produced are which of the following?
Transverse
Stationary
Longitudinal
Spectroscopy can be used to identify what?
Matter of unknown composition
Silver in bedrocks
It doesn't matter
In which stroke is the useful work done in a petrol engine?
Expansion
Compression
Exhaust
Magnetic lines of force are which of the following?
Closed curve
Open curve
None of these
What are artificial satellites used for?
Detecting minerals and space research
Only detecting minerals
Only space research
The absorption coefficient of X-rays for a given wavelength is higher from which metal?
Lead
Copper
Aluminum
What is the energy in a current carrying coil stored in the form of?
Magnetic field
Electric field
Heat
On what does the adiabatic bulk elasticity depend?
Atomicity and pressure
Pressure and volume
Volume and atomicity
A weightlifter holds a weight above his head. In this position, the weightlifter is doing what?
No work
Some work
Absolute work
In 1914, Niels Bohr obtained the spectral frequencies of which atom?
Hydrogen atom
Carbon atom
Oxygen atom
What are the combination of two or more notes which produce a melodious effect on the ear called?
Concord
Beats
Chords
Who discovered ultraviolet rays?
Johann Wilhelm Ritter
Wilhelm Conrad Rontgen
William Herschel
The mass of the Sun is how many times greater than the Earth?
333,000
129,000
490,000
What does pressure exerted by a liquid depend on?
Density
Viscosity
Critical velocity
What is the power output of a reactor adjusted by?
Controlling how many neutrons are able to create more fissions
Counting the decay of neutron emission
By a power output switch
An alternating current (A.C.) is transformed into direct current (D.C.) by which of the following?
Rectifier
Motor
Transformer
A covalent crystal is what?
Chemically bound
Very hard
Brittle
If the kinetic energy of a light weight object and a heavy object is the same, which object has the higher momentum?
Heavy object
Light weight object
Both have the same momentum
What differentiates red light from blue light?
Frequency
Velocity in vacuum
Intensity
What causes chromatic aberration in lenses?
The phenomenon of dispersion
The phenomenon of absorption
The phenomenon of scattering
An increase in which of the following increases the power of X-rays?
Frequency
Wavelength
Velocity
The average magnitude of intensity of the gravitational field on the surface of the Earth in S.I. units is about what?
10
Zero
100
Electromagnetic waves are which of the following?
Transverse in nature
Longitudinal in nature
Both
Which of the following pairs of physical quantities may be represented in the same unit?
Heat and work
Heat and temperature
Temperature and work
The relationship between the color and the temperature of a star is given by:
Wien's displacement law
Hubble law
Planck law
When viewed from Earth, which way do other galaxies seem to be moving?
Moving away from us
Moving towards us
Not moving at all
The entire charge of a charged conductor resides on which of the following?
External surface of the conductor
Internal surface of the conductor
Both surfaces
Which star is nearest to the Earth (other than the Sun)?
Alpha Centauri
Proxima Centauri
Pole star
In which region of the electromagnetic spectrum does the Lyman series of hydrogen atoms lie?
Ultraviolet
Visible
Infrared
Linear velocity is the product of which two quantities?
Angular velocity and radius
Angular velocity and time
Angular velocity and displacement
The speed of electromagnetic waves are the same in which case?
For all intensities
In all medium
For all wavelengths
The band spectrum is obtained whenever the incandescent vapor of the excited substance are in what state?
Molecular state
Plasma state
Atomic state
What quantity is an electric current?
Scalar quantity
Vector quantity
Both scalar and vector quantity
What happens to a gas that is compressed at constant temperature?
Its pressure increases
Its average kinetic energy increases
Its mass decreases
If the angular speed of Earth became 17 times its present value, a body on the equator becomes what?
Weightless
Heavier than present value
Lighter than present value
The plane of the elliptical orbit of a satellite must pass through which of the following?
Centre of the Earth
North Pole
South Pole
What is the image formed by a microscope?
Virtual and magnified
Real and magnified
Virtual and diminished
