The electric and magnetic fields of electromagnetic waves are which of the following?
In phase and perpendicular to each other
In opposite phase and parallel to each other
In phase and parallel to each other
In what does fission reaction take place?
A reactor as well as an atomic bomb
An atomic bomb only
A nuclear reactor only
What is the temperature of the surface of the Sun?
6000k
7000k
2000k
Which of the following emits sound with the highest frequency?
Mosquito
Man
Lion
What does a fusion bomb involve?
Synthesis of lighter nuclei into heavier ones
Explosion of TNT
Burning of huge amount of coal
What does a hotter gas imply a higher average value of?
Kinetic energy
Total energy
Heat content
What is the the photoelectric effect in gas called?
Ionization
Electrolysis
Electrification
The absorptive power of a body depends upon which of the following?
The nature of the body
Surface area
The time of observation
Which of these electric appliances will consume the most electricity?
Electric iron
Electric fan
Study lamp
There can be no circular motion without what?
Centripetal force
Centrifugal force
Friction force
What causes the Earth's gravitational force to increase towards the pole?
The rotation of the Earth
The shape of the Earth
The mass of the Earth
In a diffraction grating experiment, how can the pattern be enhanced?
Increasing the wavelength
Decreasing the wavelength
By a constant wavelength
What type of collision does not produce sound and heat?
Elastic collision
Inelastic collision
Perfectly Inelastic collision
When a glass convex lens is emerged in water, what happens to its focal length?
It decreases
It increases
It remains the same
An isochoric process takes place at:
Constant volume
Constant entropy
Constant pressure
What is the fixed point used for the Kelvin scale?
Triple point
Ice point
Steam point
How does the recommended inflation of tires save fuel?
Friction with the road decreases
Normal reaction decreases
Normal reaction increases
Identify the pair of quantities whose dimensions are equal.
Torque and work
Stress and energy
Force and stress
The internal energy of a real gas does not depend on which quantity?
Pressure
Temperature
Volume
Which of the following is the correct sequence of colors in a rainbow?
Red, Orange, Yellow
Orange, Red, Yellow
Red, Yellow, Orange
Which of the statements below is incorrect?
Energy can be destroyed or transformed
Energy can change from one form to another
Useful energy can be used to warm a room
The period of revolution of a geostationary satellite is what?
24 hours
30 days
365 days
Which is the fifth largest planet in our solar system?
Earth
Venus
Mercury
How many natural satellites does Earth have?
1
2
5
All bodies fall freely with which of the following?
Same acceleration
Different acceleration
Neither 1 nor 2
Which of the following substances is not ferromagnetic?
Carbon
Iron
Copper
Which of the following quantities is measured in decibels?
The intensity of sound
The speed of light
The intensity of heat
A major diatonic scale contains eight what?
Pure tones
Overtones
Tonic
The motion of a body on a circular path is called what?
Circular motion
Linear motion
Angular motion
What are beta rays?
Charged particles emitted by the nucleus
Neutral particles
Electromagnetic radiation
Which of the following will have shortest wavelength while moving with the same speed?
Deuteron
Electron
Proton
When a stone is dropped into a quiet pond, the waves produced are what?
Transverse
Stationary
Longitudinal
Which of the following wavelengths will experience greater deviation while passing through a prism?
Violet
Green
Orange
What is the brightest planet in our Solar system?
Venus
Mercury
Mars
The transformer is an electrical device which converts/regulates which of the following?
AC voltage up or down
AC into DC
DC into AC
What is the penetration of light into a geometrical shadow region called?
Diffraction
Polarization
Interference
How does the energy difference between the consecutive energy levels vary as the quantum number (n) increases?
It decreases
It increases
Remains unchanged
Stars twinkle because of what?
Refraction
Reflection
Scattering
What is Solar radiation commonly measured with?
Pyranometer
Barometer
Actinometer
The acceleration of falling bodies does not depend on what?
The mass of the body
The volume of the body
The length of the body
The wavelength of matter waves is independent of what?
Charge
Mass
Momentum
The presence of a gravitational field is required for heat transfer by:
Natural convection
Conduction
Radiation
What are y-rays?
Electromagnetic waves
Helium nuclei
Fast moving electrons
The maximum energy of the electrons released in photocell is independent of what?
Intensity of incident light
Nature of cathode surface
Frequency of incident light
If the fraction of an atom's radioactive material left over 120 years is 1/64, what is the half-life of the material?
20 years
2 years
24 years
The S.I. unit of potential difference is which of the following?
Volt
Ohm
Ampere
What does the velocity of sound in gas depend upon?
Density and elasticity of gas
Pressure of gas
Wavelength of sound
Rocket motion works on the basis of which of Newton's laws?
Second and third
Second
First
Which of the following waves is used in radar systems for aircraft navigation?
Radio waves
Infrared
Visible light
Which of the following is constant for a satellite in orbit?
Potential energy
Velocity
Acceleration
Which of the following is used to obtain virtual and diminished images?
Convex mirror
Concave lens
Convex lens
When the mass and speed of a body are doubled, the kinetic energy of the body does what?
Becomes eight times greater
Becomes four times greater
Is unchanged
What is the planet nearest to the Earth?
Mars
Venus
Mercury
The momentum of a system is conserved in which of the following conditions?
Both in elastic collision and inelastic collision
Only in elastic collision
Only in inelastic collision
For sustained interference you need sources which emit radiation:
With a constant phase difference
With same intensity
With same amplitude
Which of the following is not the name of a physical quantity?
Kilogram
Density
Impulse
What does a sound need to contain to be of a rich quality?
Many harmonics
A note of high frequency
A note of high amplitude
As water freezes, what happens to its temperature?
Does not change
Decreases
Increases
What is force a product of?
Mass and acceleration
Mass and velocity
Mass and momentum
In what type of collision is kinetic energy conserved?
Elastic collision
Inelastic collision
Perfectly inelastic collision
Enriched uranium means uranium that has been enriched in what isotope?
Uranium-235
Uranium-236
Uranium -238
The minimum velocity to project a body so that it escapes the Earth's gravitational field is called what?
Escape velocity
Gravitational velocity
Planetary velocity
Who explained the origin of the Fraunhofer lines?
Kirchhoff
Snell
Fresnel
Which part of the Sun is visible during total solar eclipse?
Corona
No part
Photosphere
What causes surface tension?
Cohesion
Viscosity
Elasticity
In a pressure cooker, the cooking is faster because the increase of vapor pressure does what?
Increases boiling point
Increases latent heat
Decreases boiling point
What is the far point of a normal human eye?
Infinity
15 cm
1 m
What are types of laser?
Solid, liquid and gas
Solid only
Liquid only
What is the boiling point of water?
It depends on atmospheric pressure
Always 100 degrees Celsius
It depends on the material of the container
A satellite is moved out to an orbit of larger radius. Which of the following quantities associated with it increases?
Potential energy
Kinetic energy
Orbital energy
What parts of a human eye give light perception and vision, including color differentiation and the perception of depth?
Rods and cones
Cubes and spheres
Film and aperture
What is the S.I unit of electric power?
kilowatt-hour
Newton
Pascal
What is resonance a special case of?
Forced vibrations
Natural vibrations
Damped vibration
What is the heat given to a body which raises its temperature by 1 degree Celsius called?
Thermal capacity
Latent heat
Specific heat
The photoelectric effect can be explained by assuming what about light?
It consists of quanta
It can be polarized
It is a form of transverse wave
Einstein was awarded the Nobel Prize for his work on which of the following?
The photoelectric effect
The theory of relativity
The theory of gravitation
What controls the penetrating power of the X-rays in a cooling tube?
Potential difference across the tube
Pressure of the age
Filament current
What is the solar spectrum during a complete solar eclipse?
Dark band
Dark line
Absorption
In circular motion, the angular displacement in a unit of time is called what?
Angular velocity
Circular velocity
Linear motion
What is one horse power equal to?
746 watt
746 megawatt
746 kilowatt
When the loudness of a note increases what else increases?
Amplitude
Intensity
Wavelength
Which of the following is not essential for simple harmonic motion storing?
Gravity
Inertia
Restoring
What is the distance between the crest of one wave and the crest of the next wave called?
Wavelength
Frequency
Amplitude
In a vibrating string the frequency of the first overtone is equal to frequency of what?
The second harmonic
The first harmonic
The fundamental note
Who invented the wireless telegraph?
Marconi
Maxwell
Hertz
What is a GM counter used for detecting?
Radioactivity
Coal
Underground water
The S.I. unit of acceleration is what?
Meter/second squared
Meter/second
Meter/hour
Which of the following is not a function of state?
Work
Temperature
Pressure
In which year was the first Nobel Prize in Physics awarded?
1901
1900
1968
What does the viscous drag on a liquid layer depend on?
Velocity
Gravity
Density
The rate of doing work is called what?
Power
Energy
Heat
On what basis is the electromagnetic waves spectrum classified?
Manner of production of the waves
Independent of production of the waves
Both
What do matter waves or de Broglie waves exhibit?
Diffraction
Transverse waves
Electromagnetic waves
The law of inertia is related to:
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
Specific heat depends on which of the following?
The nature of the material
The mass of the material
The temperature of the material
What is the normal temperature of an average human body?
37 degrees Celsius
97 degrees Celsius
37 degrees Fahrenheit
Which of the following waves/rays are produced during radioactive nuclear change?
Gamma rays
X-rays
Beta rays
Which one of the following is neither vector nor scalar?
Moment of inertia
Impulse
Work
Which is the smallest planet in the solar system?
Mercury
Venus
Earth
What type of radiation are alpha and beta particles?
Ionizing radiation
Non-ionizing radiation
Low-energy radiation
