Physics Most Important One Liner Question and Answer part -5

Physics Most Important One Liner Question and Answer part -5

• Speed of light is maximum in – Vacuum
• Cooking vessels have wooden or Bakelite handles because - Wood and Bakelite are bad conductors of heat
• A body absorbs heat most if it is – black and rough
• Nib of a pen is split keeping in view the phenomenon of – capillarity
• When the milk is churned vigorously the cream from it is separated out due to – centrifugal force
• One horse power is equal to – 746 watts
• Which part of the camera is equivalent to the retina of human eye – Film
• The clouds float in the atmosphere because of their low – Density
• At which temperature density of water is maximum – 4 degree Celsius
• Source of energy from the sun is – Nuclear fusion
• Energy conservation means – energy can neither be created nor destroyed
• For shaving, one uses – Concave mirror
• Which lens is used to minimize Myopia – Concave lens
• When a piece of ice floating in a glass of water melts, the level of water will – Remain same
• A device which converts electrical energy into mechanical energy is – electric motor
• Curie is the unit of – Radioactivity
• In human eye, image of object forms at – Retina
• The diamond appears lustrous because of – total internal reflection
• An air bubble in water will act like a – concave lens
• The light with the shortest wavelength is – Violet
• The resistance of a semiconductor on heating – decreases
• Full form of CFL – compact fluorescent lamp
• Which color has the longest wavelength – red
• The least distance of distinct vision is – 25 cm
• The body temperature of healthy man is – 37 degree Celsius
• Which uranium isotope is used in nuclear power plants to produce electricity – U-235
• Which is India’s first nuclear plant – Tarapur
• The strongest force in nature is – Nuclear force
• In nuclear reactor, heavy water is used as – Moderator
• The nature of fuse wire is – low melting point
• A transformer – is used to decrease or increase AC voltage
• Which material is used in the solar panel – Silicon
• A dynamo is used to convert – Mechanical energy into electrical energy
• Who defined the law of gravitation – Newton
• SONAR is based on the principal of – Echo
• The image formed on the retina of a human eye is – Real and inverted
• The primary colours in photography are – red, blue, green
• On which reaction Hydrogen bomb is based – uncontrolled fusion
• Bats can fly in the dark because – they are guided by the ultrasonic
• The shape of our Milky way galaxy is – spiral
• A person is hurt on kicking a stone due to – Reaction
• The color of the star is an indication of its – temperature
• Which is the best conductor of electricity – silver
• One kilowatt hour is equal to – 3.6 mega joule
• The material used in the fabrication of a transistor is – Silicon
• The SI unit of sound – decibel
• SI unit of the power of lens – Dioptre
• Which is used in pencils – Graphite
• The total energy of an electron inside an atom is – less than zero
• A second’s pendulum is a pendulum whose time period is – 2 seconds
• Hydrogen was discovered by – Cavendish
• Solar eclipse occurs when – the Moon comes between the Sun and the Earth
• The light is a – transverse wave
• The shortest unit of length is – fermi meter
• Who gave the theory of gravity – Isaac Newton
• Who was the inventor of positron – Anderson
• Neutron was discovered by – Chadwick
• Which element is found in the highest amount in the universe – Hydrogen
• Who gave the principle of relativity – Einstein
• Who discovered the law of floating – Archimedes
• The unit of measuring potential difference is – Volt
• The atomic bomb is based on the principle of – uncontrolled nuclear fission
• Why the earth is having its own atmosphere – Gravity
• At hill stations, the boiling point of water will be – less than that at sea level
• Sun appears red colour at sunrise and sunset due to – that all other colors scatter away except red
• Fuse wire made of an alloy of – Tin and Copper

 

• Hydraulic brakes in automobiles work on – Pascal’s principle
• At which temperature density of water is maximum – 4 degree Celsius
• Which type of coal produces most heat per unit – Anthracite
• What is found in frequency modulation – change in frequency
• Which color is seen in the middle of Rainbow – Green
• Why does black board appear black in color – it absorbs all colors
• Gravitational force is maximum at – poles
• What is the minimum distance required to hear an echo – 17 meters
• Photovoltaic cells are – solar cells
• When the door of refrigerator is opened in a closed room, then – the room becomes hotter gradually
• The concept of expanding universe is based on – Doppler Effect
• A person is hurt on kicking a stone due to – Reaction
• Spherical form of raindrop is due to – surface tension
• Pressure inside a soap bubble is – more than atmospheric pressure
• Fish can survive in a frozen lake because – water near the bottom does not freeze
• The ozone layer absorbs – ultraviolet rays
• The resistance of a semiconductor on heating – decreases
• Bats can fly during dark nights and also prey this is because – they produce ultrasonic waves and are guided by them
• The tolerable limit of noise for human being is around – 85 Decibel
• Sky is blue because - short waves are scattered more than long waves by atmosphere
• When we hear a sound, we can identify its source from – the overtone present in the sound
• The type of waves produced in a sonometer wire are – Transverse Stationary
• The change of focal length of an eye lens is caused by action of the – ciliary muscles
• Waves used for telecommunication are – Microwaves
• A dynamo which is said to generate electricity actually acts as a – converter of energy
• Xeric condition refers to – low humidity
• The clouds floats in the atmosphere because of their low – density
• Principle of fuse is – heating effect of electricity
• The characteristic of super conductor is – zero permeability
• Why does water tank appear shallower when viewed from the top – due to refraction
• Which color is formed when red and green are mixed – yellow
• UV rays coming from Sun, majorly causes which cancer – skin cancer
• The bending of light when it passes around a corner or a slit is due to – Diffraction
• Total internal reflection can take place when light travels from – diamond to glass