Physics-
General
Easy
Question
Two point source separated by d = 5 mm emit light of wavelength 
= 2 
in phase. A circular wire of radius 20 mm is placed around the source as shown in figure.
- Point A and B are dark and points C and D are bright.
- Points A and B are bright and point C and D are dark.
- Points A and C are dark and points B and D are bright.
- Points A and C are bright and points B and D are dark.
The correct answer is: Points A and C are bright and points B and D are dark.
Related Questions to study
physics-
Figure shown plane waves refracted for air to water using Huygen's principle a, b, c, d, e are lengths on the diagram. The refractive index of water wrt air is the ratio.
Figure shown plane waves refracted for air to water using Huygen's principle a, b, c, d, e are lengths on the diagram. The refractive index of water wrt air is the ratio.
physics-General
physics-
Two point monochromatic and coherent sources of light of wavelength l are placed on the dotted line in front of an large screen. The source emit waves in phase with each other. The distance between S1 and S2 is 'd' while their distance from the screen is much larger. Then,
1) 
If d = 7/2, O will be a minima
2) If d = 4.3, there will be a total of 8 minima on y axis.
3) If d = 7, O will be a maxima.
4) If d =, there will be only one maxima on the screen.
Which is the set of correct statement :
Two point monochromatic and coherent sources of light of wavelength l are placed on the dotted line in front of an large screen. The source emit waves in phase with each other. The distance between S1 and S2 is 'd' while their distance from the screen is much larger. Then,
1) If d = 7/2, O will be a minima
2) If d = 4.3, there will be a total of 8 minima on y axis.
3) If d = 7, O will be a maxima.
4) If d =, there will be only one maxima on the screen.
Which is the set of correct statement :
physics-General
physics-
Figure, shows wave fronts in still water, moving in the direction of the arrow towards the interface PQ between a shallow region and a deep(denser) region. Which of the lines shown may represent one of the wave fronts in the deep region?
Figure, shows wave fronts in still water, moving in the direction of the arrow towards the interface PQ between a shallow region and a deep(denser) region. Which of the lines shown may represent one of the wave fronts in the deep region?
physics-General
physics-
In the figure, the block of mass m, attached to the spring of stiffness k is in contact with the completely elastic wall, and the compression in the spring is 'e'. The spring is compressed further by 'e' by displacing the block towards left and is then released. If the collision between the block and the wall is completely elastic then the time period of oscillations of the block will be:
In the figure, the block of mass m, attached to the spring of stiffness k is in contact with the completely elastic wall, and the compression in the spring is 'e'. The spring is compressed further by 'e' by displacing the block towards left and is then released. If the collision between the block and the wall is completely elastic then the time period of oscillations of the block will be:
physics-General
physics-
Time period of small oscillation (in a vertical plane normal to the plane of strings) of the bob in the arrangement shown will be:
Time period of small oscillation (in a vertical plane normal to the plane of strings) of the bob in the arrangement shown will be:
physics-General
physics-
A body executes SHM whose period is 16s. Two seconds after it passes the equilibrium position, its velocity is 1ms–1 The amplitude of SHM is
A body executes SHM whose period is 16s. Two seconds after it passes the equilibrium position, its velocity is 1ms–1 The amplitude of SHM is
physics-General
physics-
A 2 Kg block moving with 10 m/s strikes a spring of constant 
N/m attached to 2 Kg block at rest kept on a smooth floor. The time for which rear moving block remain in contact with spring will be
A 2 Kg block moving with 10 m/s strikes a spring of constant N/m attached to 2 Kg block at rest kept on a smooth floor. The time for which rear moving block remain in contact with spring will be
physics-General
physics-
A particle performing SHM is found at its equilibrium at t = 1sec. and it is found to have a speed of 0.25 m/s at t = 2 sec. If the period of oscillation is 6 sec. Calculate amplitude of oscillation
A particle performing SHM is found at its equilibrium at t = 1sec. and it is found to have a speed of 0.25 m/s at t = 2 sec. If the period of oscillation is 6 sec. Calculate amplitude of oscillation
physics-General
physics-
A man is swinging on a swing made of 2 ropes of equal length L and in direction perpendicular to the plane of paper. The time period of the small oscillations about the mean position is
A man is swinging on a swing made of 2 ropes of equal length L and in direction perpendicular to the plane of paper. The time period of the small oscillations about the mean position is
physics-General
physics-
The graphs in figure show that a quantity y varies with displacement d in a system undergoing simple harmonic motion.
I) 
II) 
III) 
IV) 
The total energy of the system
The graphs in figure show that a quantity y varies with displacement d in a system undergoing simple harmonic motion.
I)
II)
III)
IV)
The total energy of the system
physics-General
physics-
A cylindrical block of density r is partially immersed in a liquid of density 
. The plane surface of the block remains parallel to the surface of the liquid. The height of the block is 60 cm. The block performs SHM when displaced from its mean position. [Use g = 9.8 m/s2]
A cylindrical block of density r is partially immersed in a liquid of density . The plane surface of the block remains parallel to the surface of the liquid. The height of the block is 60 cm. The block performs SHM when displaced from its mean position. [Use g = 9.8 m/s2]
physics-General
physics-
A ring of mass M and radius R sliding with a velocity v0 suddenly enters into rough surface where the coefficient of friction is 
, as shown in figure.
Choose the correct statement(s)
A ring of mass M and radius R sliding with a velocity v0 suddenly enters into rough surface where the coefficient of friction is , as shown in figure.
Choose the correct statement(s)
physics-General
physics-
A plank with a uniform sphere placed on it, rests on a smooth horizontal plane. Plank is pulled to right by a constant force F. If the sphere does not slip over the plank.
A plank with a uniform sphere placed on it, rests on a smooth horizontal plane. Plank is pulled to right by a constant force F. If the sphere does not slip over the plank.
physics-General
physics-
A yo-yo is resting on a perfectly rough horizontal table. Forces F1 , F2 and F3 are applied separately as shown. The correct statement is
A yo-yo is resting on a perfectly rough horizontal table. Forces F1 , F2 and F3 are applied separately as shown. The correct statement is
physics-General
physics-
A uniform rod of mass M is hinged at its upper end. A particle of mass m moving horizontally strikes the rod at its mid point elastically. If the particle comes to rest after collision find the value of M/m =?
A uniform rod of mass M is hinged at its upper end. A particle of mass m moving horizontally strikes the rod at its mid point elastically. If the particle comes to rest after collision find the value of M/m =?
physics-General
