Physics-
General
Easy
Question
Two mercury drops (each of radius 'r') merge to form bigger drop. The surface energy of the bigger drop, if T is the surface tension ,is:
The correct answer is:
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A thick rope of density p and length L is hung from a rigid support. The Young's modulus of the material of rope is Y. The in crease in length of the rope due to it sown weigh tis
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Physics-General
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Copper of fixed volume 'V; is drawn into wire of length 'l'. When this wire is subjected to a constant force 'F', the extension produced in the wire is '
'. Which of the following graphs is a straight line?
Copper of fixed volume 'V; is drawn into wire of length 'l'. When this wire is subjected to a constant force 'F', the extension produced in the wire is ''. Which of the following graphs is a straight line?
Physics-General
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The change in the value of 'g'at a height 'h' a bove the surface of the earth is the same as at a depth 'd' below the surface of earth. When both 'd' and 'h' are much smallerthantheradiusofearth,thenwhichoneofthefollowingiscorrect?
The change in the value of 'g'at a height 'h' a bove the surface of the earth is the same as at a depth 'd' below the surface of earth. When both 'd' and 'h' are much smallerthantheradiusofearth,thenwhichoneofthefollowingiscorrect?
Physics-General
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The moment of inertia of a uniform semicircular wire of mass mand radiusr, about an ax is passing through it scent re of
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Physics-General
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A couple produces
A couple produces
Physics-General
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A3kg balls trikes a heavy rigid wall with a speed of 10m/s at an angle of 60°.It get s reflected withthesamespeedandangleasshownhere.Iftheballisincontactwiththewallfor0.20s,whatis the average for ce exerted on the ball by the wall?
A3kg balls trikes a heavy rigid wall with a speed of 10m/s at an angle of 60°.It get s reflected withthesamespeedandangleasshownhere.Iftheballisincontactwiththewallfor0.20s,whatis the average for ce exerted on the ball by the wall?
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A block of mass m rests on a rough horizontal surface(Coefficient of friction isµ).When a bullet of mass ml2strikeshorizontally,andgetembeddedinit,theblockmoves a distanced before coming torest .The initialvelo city of the bulle is,
then the value of k is
A block of mass m rests on a rough horizontal surface(Coefficient of friction isµ).When a bullet of mass ml2strikeshorizontally,andgetembeddedinit,theblockmoves a distanced before coming torest .The initialvelo city of the bulle is,then the value of k is
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Aspring of spring constant 5x103N/m is stretch edinitially by 5cm from theunstretchedposition.Thentheworkrequiredtostretchitfurtherbyanother5cmis
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Two blocks are connected over a massless pulley as shown in fig. The mass of block A is 10 kg and the coefficien to f kineticfriction is 0.2.BlockA slides down the incline at constant speed. The mass of block B in kg is
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Physics-General
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Asatellite in a force frees paces weeps stationary interplanetary dust at a rate 
The acceleration of satellite is
Asatellite in a force frees paces weeps stationary interplanetary dust at a rate The acceleration of satellite is
Physics-General
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A vector of magnitude b is rotated through angle 
What is the change in magnitude of the vector?
A vector of magnitude b is rotated through angle What is the change in magnitude of the vector?
Physics-General
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Six
vectors,havethemagnitudesanddirectionsindicatedinthefigure.Whichofthefollowing
Sixvectors,havethemagnitudesanddirectionsindicatedinthefigure.Whichofthefollowing
Physics-General
Maths-
If 
is defined by 
If is defined by
Maths-General
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Four massless springs whose force constants are 2k, 2k, k and 2k respectively are attached to a mass M kept on a frictionless plane (as shown in figure). If the mass M is displaced in the horizontal direction, then the frequency of oscillation of the system is
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Physics-General
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A man having a wrist watch and a pendulum clock rises on a TV tower. The wrist watch and pendulum clock per chance fall from the top of the tower. Then
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Physics-General
