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A plane progressive wave is shown in the adjoining phase diagram. The wave equation of this wave, if its position is shown at t=0, is
The correct answer is:
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Air column of 20 cm length in a resonance tube resonates with a certain tuning fork when sounded at its upper open end. The lower end of the tube is closed and adjustable by changing the quantity of mercury filled inside the tube. The temperature of the air is 27oC. The change in length of the air column required, if the temperature falls to 7oC and the same tuning fork is again sounded at the upper open end is nearly
Air column of 20 cm length in a resonance tube resonates with a certain tuning fork when sounded at its upper open end. The lower end of the tube is closed and adjustable by changing the quantity of mercury filled inside the tube. The temperature of the air is 27oC. The change in length of the air column required, if the temperature falls to 7oC and the same tuning fork is again sounded at the upper open end is nearly
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How long will it take sound waves to travel the distance l between the points A and B if the air temperature between them varies linearly from T1 to T2? The velocity of sound propagation in air is equal to 
, where α is constant
How long will it take sound waves to travel the distance l between the points A and B if the air temperature between them varies linearly from T1 to T2? The velocity of sound propagation in air is equal to , where α is constant
Physics-General
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A circular current carrying coil has a radius R. The distance from the centre of the coil on the axis where the magnetic induction will be 
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Equipotential surfaces are shown in figure a and b The field in
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A)
B)
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Which of the following pair is related as in work and force
Which of the following pair is related as in work and force
Physics-General
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Two parallel plates carry opposite charges such that the electric field in the space between them is in upward direction. An electron is shot in the space and parallel to the plates. Its deflection from the original direction will be
Two parallel plates carry opposite charges such that the electric field in the space between them is in upward direction. An electron is shot in the space and parallel to the plates. Its deflection from the original direction will be
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The acceleration of a charged particle in a uniform electric field is
The acceleration of a charged particle in a uniform electric field is
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Drawings I and II show two samples of electric field lines I II
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Drawings I and II show two samples of electric field lines I II
I)
II)
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Figure shows lines of force for a system of two point charges The possible choice for the charges is q1 q2
Figure shows lines of force for a system of two point charges The possible choice for the charges is q1 q2
Physics-General
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Figure shows the electric lines of force emerging from a charged body. If the electric field at ‘A’ and ‘B’ are EA and EB respectively and if the displacement between ‘A’ and ‘B’ is ‘r’ then A B
Figure shows the electric lines of force emerging from a charged body. If the electric field at ‘A’ and ‘B’ are EA and EB respectively and if the displacement between ‘A’ and ‘B’ is ‘r’ then A B
Physics-General
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The sensitiveness of a moving coil galvanometer can be increased by decreasing
The sensitiveness of a moving coil galvanometer can be increased by decreasing
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Four charges are arranged at the corners of a square ABCD as shown in the figure. The force on the positive charge kept at the centre ‘O’ is
Four charges are arranged at the corners of a square ABCD as shown in the figure. The force on the positive charge kept at the centre ‘O’ is
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A negatively charged particle is situated on a straight line joining two other stationary particles each having charge +q. The direction of motion of the negatively charged particle will depend on
A negatively charged particle is situated on a straight line joining two other stationary particles each having charge +q. The direction of motion of the negatively charged particle will depend on
Physics-General
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The charges Q, +q and +q are placed at the vertices of a right angle triangle (isosceles triangle). The net electrostatic energy of the configuration is zero, if Q is equal to....
The charges Q, +q and +q are placed at the vertices of a right angle triangle (isosceles triangle). The net electrostatic energy of the configuration is zero, if Q is equal to....
Physics-General
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An electron of mass me, initially at rest, moves through a certain distance in a uniform electric field in time t1.A proton of mass mp , also initially at rest, takes time t2 to move through an equal distance in this uniform electric field. Neglecting the effect of gravity, the ratio 
is nearly equal to...
An electron of mass me, initially at rest, moves through a certain distance in a uniform electric field in time t1.A proton of mass mp , also initially at rest, takes time t2 to move through an equal distance in this uniform electric field. Neglecting the effect of gravity, the ratio is nearly equal to...
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