Sunday, 9 April 2017


1By which impact is Nuclear fission is caused?Neutron
2Comets revolve around which body?Sun
3Which layer of the earth is believed to have the heaviest mineral materials of highest density?72 0Central core
4When milk is churned, how does the cream separate from it?Due to the centrifugal force
5Sound travels faster in which thing?Iron than in air
6Which reflects back more sunlight as compared to other three?Land covered with fresh snow
7What minimum number of non-zero non-collinear vectors is required to produce a zero vector?3
8Which mirror is to be used to obtain a parallel beam of light from a small lamp?Concave mirror
9If the temperature of a semiconductor rises, what is its resistivity?Decrease
10'mho' is the unit of which unit?Specificresistance
11In which type of climate does the temperature never rise above 10°C throughout the year?Tundra Climate
12What is the product of the time period of a wave and its frequency?Unity
13What is the name of the scientist who stated that matter can be converted into energy?Einstein
14Einstein's mass energy relation is given by which expression?E = mc2
15What type of farming is practised in the densely populated regions of the world?Intensive farming
16By which fission does Leishmania, the causative agent of kala-azar, multiply asexually?By binary fission
17The filament of an electric bulb is made of which metal?Tungsten
18If the temperature inside a room is increased, what will be the relative humidity?Decrease
19Which proper order of seismic waves as they are received at seismograph station?P-wave, S-wave, L-wave
20What is the relative permeability of a paramagnetic material?Greater than unity
21On planet Earth, where is no centrifugal force?At the Poles
22By whom was Electron first identified?J. J. Thomson
23How must be the The lines of force of a uniform magnetic field?Parallel to each other
24When a ray of light is going from one medium to another, how is its frequency changes?Frequency remains same
25Heat given to an ideal gas under isothermal conditions is used in which work?In doing external work
26When will a hot body radiate maximum energy?If its surface is black and rough
27A far-sighted person has a near point at 100 cm. What must be the power of the correcting lens?+3.0 D
28How many image can a man see if he stands between two plane mirrors inclined at an angle of 60°?5
29Which rays can pass through 20 cm thickness of steel?ã-rays
30Mesons are found in which rays?Cosmic rays
31Why can Insects move on the surface of water without sinking?72 0 65292Due to Surface tension of water
32According to Dalton's atomic theory, which is the smallest particle which can exist independently?An atom
33Who firstly predicated the existence of electromagnetic waves?Maxwell
34The intensity of a magnetic field is defined as the force experienced by which pole?Unit north pole
35In which process, a nucleus spontaneously breaks down by emitting radiation?Radioactive decay
36Fluorescent tubes are fitted with a choke. What does the choke coil?Reduces current in the circuit
37For television broadcasting, what frequency is employed normally?30 - 300 MHz
38Which effect shows particle nature of light?Photoelectric effect
39Activated charcoal is employed to remove colouring matter from pure substance, it work?Adsorption
40Optic fibres are mainly used for which purpose?Communication
41Which rays are most penetrating?gama-rays
42Which common devices works on the basis of the principle of mutual induction?Transformer
43Which is the process in which no heat enters or leaves?Adiabatic
44By which permeabilty is a super conductor characterised?Zero permeability
45How is the speed of light with the rise in the temperature of the medium?Remains unaltered
46Pitch of the voice of women generally-Higher than that of men
47When do all the magnetic materials lose their magnetic properties?Strongly heated
48A hollow sphere of copper is positively charged, Then what will the electric field be inside the sphere?Zero
49In our houses we get 220 V A. C What does the value 220 represent?Effective voltage
50A small weight is put on the pressure cooker. It increases the pressure of the steam. Why?Area of contact is small

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