Sunday, 9 April 2017


1How can one can distinguish a telescope from a microscope?By observing size of the lens
2Which type of sound is produced by a bat?Ultrasonic
3Why does happen Short sightedness?Due to elongation of eye balls
4The quality of sound produced by an instrument depends on the which thing?Number of overtones
5What is the order of magnitude of electric resistance of the human body (dry)?106 ohm
6In electric supply lines in India, which parameter is kept constant?Frequency (50 Hz)
7The wavelength of X-rays is of the order of how many angstrom?1 Angstrom (1A0)
8At the time of short-circuit, what will be the current in the circuit?Increases heavily
9Radioactive distintegration of uranium ultimately results in which formation?Lead
10'Hydraulic brakes' and 'Hydraulic lift' are devices, why are fluids used in them? 0 65292For transmitting pressure
11If a pendulum is allowed to oscillate into jar containing water, what will its time period?Increase
12Instrument used to store the electric charge is known by which name?Capacitor
13What does Every object at a temperature above absolute zero?Radiates energy
14The value of which quantity remains same in all system of units?Specific gravity
15A floating body always displaces liquid equal to its which thing?Weight
16When viewed in white light, why do soap bubbles show colours?72Because of interference
17'Parsec' is the unit of measurement of which distance?Astronomical distance
18The light coming from stars gives the idea of their which quality?Temperature
19What is a strong argument for the particle nature of cathode rays?They are cast shadow
20Which industry produces the most non-biodegradable wastes?Thermal power plants
21What is the number of electrons in an atom of atomic number Z and mass number A?Z
22Which was the lowest unit of Chola administration?Valanadu
23When does Super conductivity result?When matter is cooled to very low temperature
24When the temperature increases, what does the angle of contact of a liquid?Decreases
25Which variety of glass is heat resistant?Pyrex glass
26Why does the velocity of rain drop attain constant value?Viscous force exerted by air
27If there were no atmosphere, what will be the length of the day on the earth?Decrease
28The focal length of a convex lens is 50 cm. what is its power?+2 D
29Which field is used to produce deflection in a television picture tube?A magnetic fields
30If the Kinetic Energy of a body is increased by 300%, how much will its momentum increase? 65292100%
31What does a permanent magnet repel?D i a m a g n e t i c substances only
32If the price of an inferior good falls, what about its demand?Remains constant
33A fan produces a feeling of comfort during hot weather. Why?Our perspiration evaporates rapidly
34Why is the gas thermometers is more sensitive than the liquid thermometer?Expand more than liquids
35Which is the correct device for the detection of thermal radiation?Thermopile
36The pressure at the bottom of a liquid tank does not depend on which area?Area of the liquid surface
37With the rise of temperature, what will be the surface tension of a liquid?Decreases
38Total internal reflection can take place when light travels from which thing?Diamond to glass
39The refractive index of a given piece of transparent quartz is greatest for which light?Violet light
40Long distance short-wave radio broad casting uses which waves?Ionospheric wave
41Recoil of a gun is an example of which thing?72 0Conservation of linear momentum
42The tendency of liquid drop to contract and why does it occupy minimum area?Due to Surface tension
43When water is heated from 0 degree C to 20 degree C, how does its volume change?It shall increase
44Folding is the result of which force?Orogenetic force
45With which can Radio wave of constant amplitude be generated?Oscillator
46What is the SI unit of Young's modulus of elasticity?Newton/m2
47If temperature rises, what will be the coefficient of viscosity of liquid?Decreases
48To an observer on the lunar surface, during the day time, how will the sky appear?Black
49What is Electromagnetic radiation with maximum wavelength?Radio waves
50What is the unit of luminous efficiency of an electric bulb?Lumen / watt

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