Physics Most Important One Liner Question and Answer part-7

Physics Most Important One Liner Question and Answer part-7

• Astronauts in space can’t stand at one place, because – there is no gravity
• What should be the characteristic of fuse wire – low melting point, high specific resistance
• Magnetism in materials is due to – circular motion of electrons
• Who gave the experimental velocity of g first – Cavendish
• When the planet comes nearer the sun moves – fast
• The period of geostationary artificial satellite – 24 hours
• For a person having hypermetropia, the near point is – Greater than 25 cm
• Vehicle use to see objects coming from behind – convex mirror
• Shaving mirror is – Concave
• The velocity of sound in the air (vacuum) is – 331 m/sec
• The normal temperature of the human body is – 310 K
• The light is a – Transverse Wave
• The shortest unit of length – fermi meter
• Who gave the theory of gravity – Isaac Newton
• Who was the inventor of positron – Anderson
• The velocity of light in vacuum or air is - 3×108?/???
• Weighing 1 kilogram is the weight – 8 N
• The measure of inductance is – Henry
• Which element is found in the highest amount in the universe – Hydrogen
• Who gave the principal of relativity – Einstein
• Who discovered the principal of ‘Law of Floating’ – Archimedes
• The Bernoulli’s theorem is – Energy conservation
• Which color has maximum energy – Violet light
• Solar radiation is measured by – Pyrometer
• Who developed the atom bomb – J. Robert Oppenheimer
• Who developed the hydrogen bomb – Edward Teller
• Which has the lowest resistivity – Silver
• The unit of measuring potential difference is – Volt
• Bubble in air or glass, in an example of – Concave lens
• Relative humidity is expressed in terms of – percentage
• Photon is the fundamental unit of – Light
• Which gas is used in bulb – Argon
• A diverging mirror is – A concave mirror
• Which type of mirror is used in the head lights of vehicles – Concave mirror
• A concave lens always forms an image which is – Virtual and erect
• Myopia is the same as – Near Sightedness
• Short-sight in human eye can be corrected by using proper – concave lens
• The primary colors in photography are – Red, Blue, Green
• In a magnifying glass which lens is used – Convex
• Convex lens is generally used in – Rear View mirror
• Why does water tank appear shallower when viewed from the top – due to refraction
• An image formed by a plane mirror, that cannot be obtained on a screen is called – virtual image
• When light passes from one medium to another, this phenomenon of change in its direction is called – Refraction
• Convex and concave mirrors are example of – Spherical mirrors
• An image formed by a concave mirror on a screen is called – Real image
• The angle between the normal and the incident ray is called the – angle of incidence
• The range of frequency of ultrasonic wave – Greater than 20000 KHz
• Which type of waves is different from other – Sound Waves
• Which character of sound wave change with change in temperature in atmosphere – Frequency
• The loudness of sound depends upon – Amplitude
• Pitch sensation which depends upon – Frequency
• Radioactive elements emit – alph, beta and gama radiations
• Which is used in pencils – Graphite
• A magnifying glass comprises a simple – convex lens
• The weight of a human body is – maximum at the poles
• A fuse is used in an electric circuit to – break the circuit when excessive current flows through the circuit
• The unit of viscosity – Poise
• The frequency of sound waves in the audible range is – 20 Hz to 20000Hz
• Which is a good conductor of electricity – Graphite
• The Doppler’s effect is applicable for – light wave and sound wave
• If a sound travel from air to water, the quantity that remain unchanged is – frequency
• Waves which do not require any material medium for its propagation is – Electromagnetic waves
• Sound travels fastest in – Steel
• The type of waves produced in a sonometer wire is – transverse stationary
• With the increase in temperature, the frequency of the sound from an organ pipe – remain unchanged
• The phenomena in which the amplitude of oscillation of pendulum decreases gradually is called – damping
• When two sound waves are superimposed beats are produced when they have – different frequencies
• It is difficult to walk on any oily floor because – force of friction is very less
• The coefficient of static friction is – equal to the tangent of the angle of friction
• A match stick struck on a matchbox catches fire easily because – friction may cause fire
• Tyre are treading to – increase friction
• Lubricants are substances which – reduces friction
• Sliding friction is greater than to – rolling friction
• The total energy of an electron inside an atom is – less than zero
• A second’s pendulum is a pendulum is a pendulum whose time period is – 2 seconds
• A jug is filled the brim with water at 0 degree Celsius a piece of ice floats in it. The moment the ice melts – water level is unchanged
• Iodine test is used to detect – carbohydrate
• Hydrogen was discovered by – Cavendish
• Light year is a unit of – distance
• Sound waves does not travel in – vacuum
• Venn diagram was invented by – John Venn
• A spinning neutron star is known as – Pulsar
• What is the Human body’s normal temperature at Fahrenheit – 98.6
• What is the reason by which a mosquito’s larva floats at the surface of water – Surface Tension
• Optical fibres are based on the phenomena of – Total Internal Reflection
• What is the specific heat of iron – 11 cal/gm0c
• The unit of capacitance is - Farad
• -273 0c temperature is also called as – Absolute Zero
• Indian Institute of Astrophysics is in - Kodai Canal (Tamil Nadu)
• What is the intensity of normal conversation in decimal – 30-40
• Soap decreases the surface tension of solution hence - clothes get cleansed
• What does happen when water is condensed into ice – Heat is released
• Visible spectrum is the spectrum from in sunlight – Red color to violet color
• What is the refractive index of human’s eye Aqueous Fluid – 33
• The average density on Earth is - 5 cubic centimetre
• What is the wavelength of violet color – 380-450 nm
• Planck’s constant and angular momentum have the - same units.
• What is the virtual weight of floated object – zero
• Most of the weather disturbances take place in - troposphere
• The weight of an object increases on taking it from the equator towards the pole - at Sea level