A large insulated sphere of radius r charged with Q units of electricity is placed in contact with a small insulated uncharged sphere of radius r and in then separated. The charge on smaller sphere will now be
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The magnitude of electric field 
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Two spheres of radii 
and 
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What is the potential difference across 2
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A hollow charged metal sphere has radius r . If the potential difference between its surface and a point at a distance 3r from the centre is V, then electric field intensity at a distance 3r is
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The maximum field intensity on the axis of a uniformly charged ring of charge q and radius R will be
The maximum field intensity on the axis of a uniformly charged ring of charge q and radius R will be
The atomic radii in periodic table among elements from right to left
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The unit representing atomic radii and ionic radii is
The unit representing atomic radii and ionic radii is
The lanthanide contraction is responsible for the fact that
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Which of the following attacks glass
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A sodium cation has a different number of electrons from
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electron ; 4 electroWhich has the smallest size
. Therefore its size is smallestWhich has the smallest size
. Therefore its size is smallestWhich one of the following indicates the correct order of atomic size
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The ionic radii of 
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is maximum. It has smallest size.The ionic radii of , , and follow the order
is maximum. It has smallest size.