Physics-
General
Easy
Question
A metal sphere is hung by a string fixed to a wall. The sphere is pushed away from the wall by a stick. The forces acting on the sphere are shown in the second diagram. Which of the following statements is wrong
The correct answer is:
As the metal sphere is in equilibrium under the effect of three forces therefore
From the figure 
…(i)
(ii)
From equation (i) and (ii) we get
and
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Figure shows ABCDEF as a regular hexagon. What is the value of 
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Physics-General
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Find the resultant of three vectors 
and 
shown in the following figure. Radius of the circle is R.
Find the resultant of three vectors and shown in the following figure. Radius of the circle is R.
Physics-General
Chemistry-
of KOH solution was titrated with 0.20 M 
solution in a conductivity cell. The data obtained were plotted to give the graph shown below
The concentration of the KOH solution was
of KOH solution was titrated with 0.20 M solution in a conductivity cell. The data obtained were plotted to give the graph shown below
The concentration of the KOH solution was
Chemistry-General
Chemistry-
Following experiment has been given to identify isomer. Read the Experiment and answer the questions
A compound
has been prepared in a number of isomeric forms. One form undergoes no reaction with 
or (en) and is optically inactive .A second form reacts with but not with (en) and is optically active and reacts with both and (en), complexes are
First form of the complex is
Following experiment has been given to identify isomer. Read the Experiment and answer the questions
A compound has been prepared in a number of isomeric forms. One form undergoes no reaction with or (en) and is optically inactive .A second form reacts with but not with (en) and is optically active and reacts with both and (en), complexes are
First form of the complex is
Chemistry-General
Chemistry-
Tautomerism is the phenomenon in which two structural isomers differing in the relative positions of their atoms are spontaneously interconvertable and can exist in dynamic equilibrium. The two forms in tautomeric equilibrium are called tautomers of each other. The interconvertibility of tautomers is a chemical reaction which involves making and braking of bonds. Tautomers are true isomers, and either of the individual tautomeric forms may be isolated
In the keto-enoltautomerism of dicarbonyl compounds the enol form is preferred in contrast to the keto form, this is due to
Tautomerism is the phenomenon in which two structural isomers differing in the relative positions of their atoms are spontaneously interconvertable and can exist in dynamic equilibrium. The two forms in tautomeric equilibrium are called tautomers of each other. The interconvertibility of tautomers is a chemical reaction which involves making and braking of bonds. Tautomers are true isomers, and either of the individual tautomeric forms may be isolated
In the keto-enoltautomerism of dicarbonyl compounds the enol form is preferred in contrast to the keto form, this is due to
Chemistry-General
Physics-
In LR circuit (shown in figure), current is lagging by 
in phase with applied voltage, then select correct alternative :
In LR circuit (shown in figure), current is lagging by in phase with applied voltage, then select correct alternative :
Physics-General
Physics-
A metal rod of length, moving with an angular velocity v and velocity of its centre is v. Find potential difference between points A and B at the instants how n in figure. A uniform magnetic field of strength B exist perpendicular
to plane of paper :
A metal rod of length, moving with an angular velocity v and velocity of its centre is v. Find potential difference between points A and B at the instants how n in figure. A uniform magnetic field of strength B exist perpendicular
to plane of paper :
Physics-General
Physics-
Particle sticks to wooden loop, If particle reach at the lowest position for first time after time T. Then displacement of centre of mass of system in this time interval will be :
Particle sticks to wooden loop, If particle reach at the lowest position for first time after time T. Then displacement of centre of mass of system in this time interval will be :
Physics-General
Physics-
One end of a light rod of length 1 m is attached with a string of length 1m. Other end of the rod is attached at point O such that rod can move in a vertical circle. Other end of the string is attached with a block of mass 2kg. The minimum velocity that must be given to the block in horizontal direction so that it can complete the vertical circle is (g = 10 m/s2 )
One end of a light rod of length 1 m is attached with a string of length 1m. Other end of the rod is attached at point O such that rod can move in a vertical circle. Other end of the string is attached with a block of mass 2kg. The minimum velocity that must be given to the block in horizontal direction so that it can complete the vertical circle is (g = 10 m/s2 )
Physics-General
Physics-
Three point masses are attached by light inextensible strings of various lengths to a point O on the ceiling. All of the masses swing round in horizontal circles of various radii with the same angular frequency w (one such circle is drawn in the shown figure.) Then pick up the correct statement.
Three point masses are attached by light inextensible strings of various lengths to a point O on the ceiling. All of the masses swing round in horizontal circles of various radii with the same angular frequency w (one such circle is drawn in the shown figure.) Then pick up the correct statement.
Physics-General
Physics-
Two blocks of mass m1 and m2 (m1 < m2 ) are connected with an ideal spring on a smooth horizontal surface as shown in figure. At t = 0 m1 is at rest and m2 is given a velocity v towards right. At this moment, spring is in its natural length. Then choose the correct alternative :
Two blocks of mass m1 and m2 (m1 < m2 ) are connected with an ideal spring on a smooth horizontal surface as shown in figure. At t = 0 m1 is at rest and m2 is given a velocity v towards right. At this moment, spring is in its natural length. Then choose the correct alternative :
Physics-General
Physics-
A small bead of mass m = 1 kg is free to move on a circular hoop. The circular hoop has centre at C and radius r = 1 m and it rotates about a fixed vertical axis. The coefficient of friction between bead and hoop is µ = 0.5. The maximum angular speed of the hoop for which the bead does not have relative motion with respect to hoop, at the position shown in figure is : (Take g = 10 m/s2)
A small bead of mass m = 1 kg is free to move on a circular hoop. The circular hoop has centre at C and radius r = 1 m and it rotates about a fixed vertical axis. The coefficient of friction between bead and hoop is µ = 0.5. The maximum angular speed of the hoop for which the bead does not have relative motion with respect to hoop, at the position shown in figure is : (Take g = 10 m/s2)
Physics-General
Physics-
A particle is moving along an elliptical path with constant speed. As it moves from A to B, magnitude of its acceleration
A particle is moving along an elliptical path with constant speed. As it moves from A to B, magnitude of its acceleration
Physics-General
Physics-
In the figure shown a semicircular area is removed from a uniform square plate of side ‘ l ’ and mass ‘m’ (before removing). The x-coordinate of centre of mass of remaining portion is (The origin is at the centre of square)
In the figure shown a semicircular area is removed from a uniform square plate of side ‘ l ’ and mass ‘m’ (before removing). The x-coordinate of centre of mass of remaining portion is (The origin is at the centre of square)
Physics-General
Physics-
Consider the system shown in figure. Pulley, string and spring are ideal and Dm << M. Initially spring is in it’s natural length and both the blocks are at rest. (Assume that initially Dm was situated at origin). Maximum y coordinate of Dm in subsequent motion is xmg/k then value of x is
Consider the system shown in figure. Pulley, string and spring are ideal and Dm << M. Initially spring is in it’s natural length and both the blocks are at rest. (Assume that initially Dm was situated at origin). Maximum y coordinate of Dm in subsequent motion is xmg/k then value of x is
Physics-General
