Physics-
General
Easy
Question
A large sheet carries uniform surface charge density 
. A rod of length 2l has a linear charge density 
on one half and –l on the second half. The rod is hinged at mid point O and makes an angle q with the normal to the sheet. The torque experienced by the rod is
- 0
The correct answer is:
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Figure shows the electric field lines around an electric dipole. Which of the arrows best represents the electric field at point P ?
Figure shows the electric field lines around an electric dipole. Which of the arrows best represents the electric field at point P ?
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A, B, C, D, P and Q are points in a uniform electric field. The potentials a these points are V (A) = 2 volt. V (P) = V (B) = V (D) = 5 volt. V (C) = 8 volt. The electric field at P is
A, B, C, D, P and Q are points in a uniform electric field. The potentials a these points are V (A) = 2 volt. V (P) = V (B) = V (D) = 5 volt. V (C) = 8 volt. The electric field at P is
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An equilateral triangle wire frame of side L having 3 point charges at its vertices is kept in x-y plane as shown. Component of electric field due to the configuration in z direction at (0, 0, L) is [origin is centroid of triangle]
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A wheel having mass m has charges +q and –q on diametrically opposite points. It remains in equilibrium on a rough inclined plane in the presence of uniform vertical electric field E =
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Find the force experienced by the semicircular rod charged with a charge q, placed as shown in figure. Radius of the wire is R and the line of charge with linear charge density l is passing through its centre and perpendicular to the plane of wire.
Find the force experienced by the semicircular rod charged with a charge q, placed as shown in figure. Radius of the wire is R and the line of charge with linear charge density l is passing through its centre and perpendicular to the plane of wire.
physics-General
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In a certain region of space, the potential is given by : 
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A uniform electric field having strength 
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Figure shows equi-potential surfaces for a two charges system. At which of the labeled points point will an electron have the highest potential energy?
Figure shows equi-potential surfaces for a two charges system. At which of the labeled points point will an electron have the highest potential energy?
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From B2H6 , all the following can be prepared except –
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chemistry-General
chemistry-
black coloured compound (A) on reaction with dilH2SO4 gives a gas (B) which on passing in a Solution of an acid (C) gives a white turbidity (D)Gas (B) when passed in an acidified Solution of a compound (E) gives a black precipitate (F) which is Soluble in hot concentrated (C)After boiling this Solution when excess of ammonia Solution is added, a blue coloured compound (G) is formed To the Solution of (E), on addition of acetic acid and aqpotassium ferrocyanide, a chocolate brown precipitate (H) is formed On addition of an aqueous Solution of BaCl2 to an aqueous Solution of (E) white precipitate in Soluble in HNO3 is obtained
When a piece of iron or zinc is added to the Solution of a compound (F) in hot concentrated (C) acid:
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When a piece of iron or zinc is added to the Solution of a compound (F) in hot concentrated (C) acid:
chemistry-General
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A sodium salt on treatment with MgCl2 gives white precipitate only on heating The anion of the sodium salt is :
A sodium salt on treatment with MgCl2 gives white precipitate only on heating The anion of the sodium salt is :
chemistry-General
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The correct option(s) to distinguish nitrate salts of Mn2+ and Cu2+ taken separately is (are)
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chemistry-General
chemistry-
For the given aqueous reaction which of the statement(s) is (are) true ? 
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The equilibrium 
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The equilibrium in aqueous medium at 25°C shifts towards the left in the presence of :
chemistry-General
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In blue Solution of copper sulphate excess of KCN is added then Solution becomes colourless due to the formation of
In blue Solution of copper sulphate excess of KCN is added then Solution becomes colourless due to the formation of
chemistry-General
