Physics Most Important One Liner Question and Answer part-9

Physics: Most Important One Liner Question and Answer part-9

• The science a push or pull of an object is called – Force
• on which principle does the hydraulic lift works – Pascal’s law
• Ball pen functions on the principle of – Gravitational force
• A man cannot see clearly beyond 10 meters. The disease he suffers from – Myopia
• Conversion of heat into electrical is achieved by using – Thermocouple
• The part of the eye having the larges refractive index is – lens
• Kilowatt hour is the unit of – Energy
• The temperature which has the same reading on both Fahrenheit and Celsius scales is – 40 Degree
• Water boils at a lower temperature on the hills because – there is a decrease in air pressure on the hills
• The slope of a velocity time graph represents – acceleration
• The earth wire of a cable is connected to – the fuse of the appliance
• Water Is used in car radiator because of its – high specific heat capacity
• A periscope works on the principle of – total internal reflection
• Why do birds not have respiratory trouble at the time of – They have extra air sacs
• Moving electric charge produces – magnetic field
• Light beam which is highly directional is called – laser
• Permissible noise level at Residential area during night time Is - 45 dB
• Electric Motor converts electrical energy into – Mechanical Energy
• Law of gravitation applies to – Any Pair of bodies
• A raised hammer possesses – Gravitational potential energy
• The spring balance works on the principal of – hook’s law
• Chromatic aberration in a lens is caused by which phenomenon – dispersion
• What will undergo maximum diffraction – radio waves
• Highest refractive index – Diamond
• Fuse wire made of an alloy of – Tin and Copper
• Friction is a property that can easily charge – Insulator
• Momentum is measured as the product of – Mass and Velocity
• The SI unit of Resistance – Ohm
• According Kepler, the path of planets revolving around sun is – Elliptical
• The centre of the reflecting surface of a spherical mirror is called the – Center of Curvature
• X-Rays were discovered by – Roentgen
• Mechanical energy is the combination of kinetic energy and – Potential energy
• Which is an ore of iron – Siderite
• In comparison to short wires, long wire has – More resistance
• One horse power equals to – 746 Watts
• An AC generator is based on which principal – Faradays law
• Cyclotrons are used to accelerate – Only positively charged particle
• Transverse waves can propagate in – Metal but not in gas
• Where are transformers used – AC circuit
• When milk is churned, the cream separates from it due to the – Centrifugal force
• I-123 Iodide is used for – Thyroid imaging
• What is the unit of the physical quantity “Young’s Modulus” – Pascal
• Who invented Ceiling fan – Philip Diefl
• The Saturn rings were discovered by – Galileo
• Law of Inertia is also known as – Newton’s First law of motion
• Which is the strongest force – Nuclear force
• Maxwell is the CGS unit of – Magnetic Flux
• Action and reaction are - equal in magnitude
• Energy in the foods can be measured in which units – Calorie
• Ability to distinguish two closely placed objects is – Resolving power
• Jet Engines works on the principal of conservation of – Linear Momentum
• The instrument used to study the laws of vibrating string is – Sonometer
• Rockets works on the principal of – Conservation of momentum
• Electric charge can easily flow through – Conductors
• It is difficult of walk on ice than on concrete road because – Due to less friction between ice and feet
• Which instrument is used to measure the speed of a vehicle – Speedometer
• Ampere is the unit of – Electric current
• A solar cell converts – solar energy into electrical energy
• Which is the most elastic – Steel
• Leaf springs are subjected to – bending stress
• Who developed the method of “Radio Active Carbon Dating - Willard Libby
• A group of four meson is known as – Kaon
• An instrument used to measure humidity – Hygrometer
• Why water drops come down spherical in shape – Due to Surface Tension
• Electron microscope was invented by – Knoil and Ruska
• Which wave is used in oven – Microwaves
• Triple point of water in Kelvin is – 16K
• Radioactive substance does not emit – Electron
• When a body is taken from the equator to the poles, its weight – Increases
• Which star is nearest to the earth – Proxima Centauri
• On the Celsius scale the absolute zero of temperature is at - -273.15 degree Celsius
• The weight of a body at the centre of the earth is – Zero
• The visible portion of the electromagnetic spectrum is – Light
• Liquids and gases never show – Ferromagnetic Property
• A typical black hole is always specified by – event horizon
• A mobile phone charger is – a step-down transformer
• The angular speed of a whirlwind in a tornado towards the center – increase
• In SONAR, we use – ultrasonic waves
• The rate of change of momentum of a body is equal to the resultant – force
• The focal length of a convex lens is – shorter for blue light than for red
• The SI unit of mechanical power is – Watt
• Renewable energy can be obtained from – Biomass
• The commercial unit of Energy is – Kilowatt-Hour
• Plum Pudding Model for an atom was proposed by – JJ Thomson
• For which does the centre of mass lie outside the body – A ring
• The optical phenomenon that is primarily responsible for the observation of rainbow on a rainy day is – dispersion
• Radio waves are reflected back to earth from the – Ionosphere
• Earthquake waves are – Infrasonic waves
• Laser is a device to produce – coherent light
• The rusting of iron nail – increase its weight
• The coil of a heater is made of – nichrome
• Which type of glass is used for making optical instrument – flint glass
• Who firstly demonstrated experimentally the existence of electromagnetic wave –Heinrich Rudolf Hertz
• The working of the quartz crystal in the watch is based on which effect – Piezoelectric Effect
• What is the unit of Radioactivity – Curie
• What is the wavelength of visible spectrum? – 390-700 nanometres
• One astronomical unit is the average distance between – Earth & Sun
• Number of basic S.I. units is – Seven (7)
• What is the name of the scientist who stated that matter can be converted into energy – Einstein