Physics-
General
Easy
Question
Two charges 2c and 6c are separated by a finite distance. If a charge of -4c is added to each of them, the initial force of 
will change to
The correct answer is:
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f(x) = x3 – 3x2 + 6x + 7 has
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In a Young's double slit experiment set-up source S of wavelength 
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and 
, Which act as two coherent sources. The source S oscillates about its shown position according to the equation 
, where 
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in second. Find positions of central maxima as a function of time with respect to ' O '.
In a Young's double slit experiment set-up source S of wavelength illuminates two slits and , Which act as two coherent sources. The source S oscillates about its shown position according to the equation , where is in millimeters and in second. Find positions of central maxima as a function of time with respect to ' O '.
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In a Young's double slit interference experiment the fringe pattern is observed on a screen placed at a distance D from the slits. The slits are separated by a distance d and are illuminated by monochromatic light of wavelength 
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In a Young's double slit interference experiment the fringe pattern is observed on a screen placed at a distance D from the slits. The slits are separated by a distance d and are illuminated by monochromatic light of wavelength . Find the distance from the central point where the intensity falls to (A) half the maximum, (B) one fourth of the maximum.
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A double slit 
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A double slit is illuminated by a coherent light of wavelength . The slits are separated by a distance d. A plane mirror is placed in front of the double slit at a distance from it and a screen is placed behind the double slit at a distance from it. The screen receives only the light
Physics-General
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Two transparent slabs having equal thickness but different refractive indices 
and 
are pasted side by side to form a composite slab. This slab is placed just after the double slit in a Young's experiment so that the light from one slit goes through one material and the light from the other slit goes through the other material. What should be the minimum thickness of the slab so that there is a minimum at the point 
which is equidistant from the slits?
Two transparent slabs having equal thickness but different refractive indices and are pasted side by side to form a composite slab. This slab is placed just after the double slit in a Young's experiment so that the light from one slit goes through one material and the light from the other slit goes through the other material. What should be the minimum thickness of the slab so that there is a minimum at the point which is equidistant from the slits?
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Find the angular separation between the consecutive bright fringes in a Young's double slit experiment with blue-green light of wavelength 500 nm. The separation between the slits is 
.
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Physics-General
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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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If Hari displaces 50 kg mass by 5 metre and Krishna displaces 100 kg mass by 2.5 metre which one does more work?
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By doing 2000 J of work, a body moved to a height of 50m Find its mass (g = 10m/s2)
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Physics-General
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A boy of mass 20kg went to first floor of a building having 17 steps each of 20cm wide and 20cm height Find the P E of the boy in first floor
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Relation between kinetic energy and momentum is ............
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By applying a force of 100N, 300J of work is done on a body If we use 1500N, how much work is done to get same displacement for another body?
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Five forces are acting as shown in figure Find the mass of the body if acceleration produced is 2m/s2 and the resultant force acting on the body is 4N.
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Three forces are acting as shown in figure Find the acceleration produced for the body of mass 2kg?
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Physics-General
