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X(g).The liberated gas ______________________.
with constant velocity v. A current i is flowing in the conductor in a direction perpendicular to paper inwards. A vertically upwards magnetic field 
exists in space. Then, the magnitude of magnetic field 
is
. What must be the potential difference across the coil so as to nullify the Earth's magnetic field H = 0.314 G at the centre of the coil?
Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO2, most commonly found in nature as quartz and in various living organisms.[5][6] In many parts of the world, silica is the major constituent of sand. Silica is one of the most complex and most abundant families of materials, existing as a compound of several minerals and as synthetic product. Notable examples include fused quartz, fumed silica, silica gel, and aerogels. It is used in structural materials, microelectronics (as an electrical insulator), and as components in the food and pharmaceutical industries.