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Question 1 of 20
Sound travels at the fastest speed in
Question 2 of 20
oil raise up the wick in a lamp. The principle involves
Question 3 of 20
Superconductors are substances which
Question 4 of 20
Radio telescopes are better than optical telescopes because
Question 5 of 20
Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
Question 6 of 20
Out of the following pairs, which one does not have identical dimension?
Question 7 of 20
Mercury is commonly used as a thermometric fluid rather than water because
Question 8 of 20
Optical fibre works on the
Question 9 of 20
Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
Question 10 of 20
Solar eclipse will take place when
Question 11 of 20
Isotopes of an element contain
Question 12 of 20
Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?
Question 13 of 20
In which of the following industries is mica as a raw material?
Question 14 of 20
Radiocarbon dating technique is used to estimate the age of
Question 15 of 20
Mica is used in electrical appliances such as electric iron because mica is
Question 16 of 20
It is easier to roll a barrel full of coal tar than to pull it because
Question 17 of 20
Minimum number of unequal vectors which can give zero resultant are
Question 18 of 20
Intensity of sound has
Question 19 of 20
Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from
Question 20 of 20
An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is