Physics-
General
Easy
Question
Three resistances each of 3 
are connected as shown in fig The resultant resistance between A and F is
- 9
- 2
- 4
- 1
The correct answer is: 1
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Valence bond theory explains the magnetic behavior of coordination species Depending upon the magnetic behavior one can understand whether the inner d- orbitals or outer d- orbitals are being used in a particular hybrid station However, the colours of coordination species can he explained by the crystal filed theory.
Which of the following compounds is diamagnetic as well as coloured
Valence bond theory explains the magnetic behavior of coordination species Depending upon the magnetic behavior one can understand whether the inner d- orbitals or outer d- orbitals are being used in a particular hybrid station However, the colours of coordination species can he explained by the crystal filed theory.
Which of the following compounds is diamagnetic as well as coloured
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In a Young's double slit experiment, green light is incident on the two slits. The interference pattern is observed on a screen. Which of the following changes would cause the observed fringes to be more closely spaced ?
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Figure shows plane waves refracted from air to water using Huygen's principle a,b,c,d,e are lengths on the diagram. The refractive index of water w.r.t air is the ratio.
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A monochromatic light source of wavelength 
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A monochromatic light source of wavelength is placed at S. Three slits and are equidistant from the source S and the point P on the screen. and . If I be the intensity at P when only one slit is open, the intensity at P when all the three slits are open is–
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In the figure shown, a parallel beam of light is incident on the plane of the slits of Young's double slit experiment. Light incident on the slit, 
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In the figure shown, a parallel beam of light is incident on the plane of the slits of Young's double slit experiment. Light incident on the slit, passes through a medium of variable refractive index (where 'X' is the distance from the plane of slits as shown), up to a distance '' before falling on . Rest of the space is filled with air. If at 'O' a minima is formed, then the minimum value of the positive constant a (in terms of l and wavelength '' in air) is:
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and 
are plane mirrors and kept parallel to each other. At point O there will be a maxima for wavelength . Light from monochromatic source S of wavelength is not reaching directly on the screen. Then is : 
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In the figure shown in a YDSE, a parallel beam of light is incident on the slits from a medium of refractive index 
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In the figure shown in a YDSE, a parallel beam of light is incident on the slits from a medium of refractive index . The wavelength of light in this medium is . A transparent slab of thickness 't' and refractive index is put in front of one slit. The medium between the screen and the plane of the slits is . The phase difference between the light waves reaching point O (Symmetrical , relative to the slits) is :
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In the figure shown if a parallel beam of white light is incident on the plane of the slits then the distance of the nearest white spot on the screen from O is : [assume 
]
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As shown in arrangement waves with identical wavelengths and amplitudes and that are initially in phase travel through different media, Ray 1 travels through air and Ray 2 through a transparent medium for equal length L, in four different situations. In each situation the two rays reach a common point on the screen. The number of wavelengths in length L is 
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In the YDSE shown the two slits are covered with thin sheets having thickness t & 2t and refractive index 2
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Two point source separated by d = 5 mm emit light of wavelength 
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Two coherent narrow slits emitting light of wavelength in the same phase are placed parallel to each other at a small separation of 3. The light is collected on a screen S which is placed at a distance D (>>) from the slits. The smallest distance x such that the P is a maxima.
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A ray of light is incident on a thin film. As shown in figure M, N are two reflected rays and P, Q are two transmitted rays, Rays N and Q undergo a phase change of 
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In YDSE, the source placed symmetrically with respect to the slit is now moved parallel to the plane of the slits it is closer to the upper slit, as shown. Then ,
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physics-General
