Physics-
General
Easy
Question
Shown in the figure is a circular loop of radius 
and resistance 
. A variable magnetic field of induction 
is established inside the coil. If the key (
) is closed, the electrical power developed right after closing the switch is equal to
The correct answer is:
At the time of starting 
so 
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In a circuit with a coil resistance 
, the magnetic flux changes from 
to 
in 0.2 second. The charge that flows in the coil during this time is
In a circuit with a coil resistance , the magnetic flux changes from to in 0.2 second. The charge that flows in the coil during this time is
Physics-General
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The current through choke coil increases from zero to 6 
in 
and an induced e.m.f. of 30 
is produced. The inductance of the coil of choke is
The current through choke coil increases from zero to 6 in and an induced e.m.f. of 30 is produced. The inductance of the coil of choke is
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A 50 
ac current of peak value 2 A flows through one of the pair of coils. If the mutual inductance between the pair of coils is 150 
, then the peak value of voltage induced in the second coil is
A 50 ac current of peak value 2 A flows through one of the pair of coils. If the mutual inductance between the pair of coils is 150 , then the peak value of voltage induced in the second coil is
Physics-General
Chemistry-
For the reaction, 
the equilibrium concetratio of 
and HI are 8.0, 3.0 and 28.0 mol/L respectively. The equilibrium constant of the reaction is
For the reaction, the equilibrium concetratio of and HI are 8.0, 3.0 and 28.0 mol/L respectively. The equilibrium constant of the reaction is
Chemistry-General
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In the reaction, 
is that part of 
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In the reaction, is that part of which dissociates, then the number of moles at equilibrium will be
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According to Le-Chatelier principle, adding heat a solid and liquid in equilibrium will cause the
According to Le-Chatelier principle, adding heat a solid and liquid in equilibrium will cause the
Chemistry-General
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The gaseous reaction, 
is most favoured at
The gaseous reaction, is most favoured at
Chemistry-General
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The total number of different kind of buffers obtained during the titration of 
with 
are:
The total number of different kind of buffers obtained during the titration of with are:
Chemistry-General
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The 
value of 
is 5. Calculate the pH of the buffer solution, 1 L of which contains 0.01 M 
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Chemistry-General
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The number of ions formed when 
dissolves in water is:
The number of ions formed when dissolves in water is:
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According to hard and soft acid-base principle, a hard acid
According to hard and soft acid-base principle, a hard acid
Chemistry-General
Chemistry-
The equilibrium constants for the reactions are: 
The equilibrium constant for 
will be:
The equilibrium constants for the reactions are: The equilibrium constant for will be:
Chemistry-General
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A buffer solution contains 0.1 mole of sodium acetate dissolved in 
of 0.1 M acetic acid. To the above buffer solution, 0.1 mole of sodium acetate is further added and dissolved. The pH of the resulting buffer is
A buffer solution contains 0.1 mole of sodium acetate dissolved in of 0.1 M acetic acid. To the above buffer solution, 0.1 mole of sodium acetate is further added and dissolved. The pH of the resulting buffer is
Chemistry-General
General
A charge q is placed at a distance a 2 above the centre of a horizontal square surface of edge a as shown in figure. The electric flux through the square surface is
A charge q is placed at a distance a 2 above the centre of a horizontal square surface of edge a as shown in figure. The electric flux through the square surface is
GeneralGeneral
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The pH of a 0.001 M NaOH will be
The pH of a 0.001 M NaOH will be
Chemistry-General
