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General
Easy
Question
A stone projected with a velocity u at an angle 
with the horizontal reaches maximum height H1 When it is projected with velocity u at an angle 
with the horizontal, it reaches maximum height H2 The relation between the horizontal range R of the projectile, H1 and H2 is :
The correct answer is:
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A body is projected at such an angle that the horizontal range is three times the greatest height. The angle of projection is :
A body is projected at such an angle that the horizontal range is three times the greatest height. The angle of projection is :
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A projectile thrown with a speed 
at an angle has a range R on the surface of earth. For same and , its range on the surface of moon will be :
A projectile thrown with a speed at an angle has a range R on the surface of earth. For same and , its range on the surface of moon will be :
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At the height 80 m, an aeroplane is moving with 150 m/s. A bomb is dropped from it so as to hit a target. At what distance from the target should the bomb be dropped (given g = 10 m/s2)
At the height 80 m, an aeroplane is moving with 150 m/s. A bomb is dropped from it so as to hit a target. At what distance from the target should the bomb be dropped (given g = 10 m/s2)
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A stone is just released from the window of a train moving along a horizontal straight track. The stone will hit the ground following :
A stone is just released from the window of a train moving along a horizontal straight track. The stone will hit the ground following :
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The value of stopping potential in the following diagram
The value of stopping potential in the following diagram
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The curve between current (i) and potential difference (V) for a photo cell will be
The curve between current (i) and potential difference (V) for a photo cell will be
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The figure represents the observed intensity of X-rays emitted by an X-ray tube as a function of wavelength. The sharp peaks A and B denote
The figure represents the observed intensity of X-rays emitted by an X-ray tube as a function of wavelength. The sharp peaks A and B denote
Physics-General
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The intensity of X-rays from a Coolidge tube is plotted against wavelength as shown in the figure. The minimum wavelength found is λc and the wavelength of the Kα line is λk. As the accelerating voltage is increased
The intensity of X-rays from a Coolidge tube is plotted against wavelength as shown in the figure. The minimum wavelength found is λc and the wavelength of the Kα line is λk. As the accelerating voltage is increased
Physics-General
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The stopping potential as a function of the frequency of the incident radiation is plotted for two different photoelectric surfaces A and B. The graphs show that work function of A is
The stopping potential as a function of the frequency of the incident radiation is plotted for two different photoelectric surfaces A and B. The graphs show that work function of A is
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In an experiment on photoelectric effect the frequency f of the incident light is plotted against the stopping potential null. The work function of the photoelectric surface is given by (e is electronic charge)
In an experiment on photoelectric effect the frequency f of the incident light is plotted against the stopping potential null. The work function of the photoelectric surface is given by (e is electronic charge)
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The stopping potential V for photoelectric emission from a metal surface is plotted along Y-axis and frequency n of incident light along X-axis. A straight line is obtained as shown. Planck's constant is given by
The stopping potential V for photoelectric emission from a metal surface is plotted along Y-axis and frequency n of incident light along X-axis. A straight line is obtained as shown. Planck's constant is given by
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For the photoelectric effect, the maximum kinetic energy null of the emitted photoelectrons is plotted against the frequency n of the incident photons as shown in the figure. The slope of the curve gives
For the photoelectric effect, the maximum kinetic energy null of the emitted photoelectrons is plotted against the frequency n of the incident photons as shown in the figure. The slope of the curve gives
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The figure shows the variation of photocurrent with anode potential for a photo-sensitive surface for three different radiations. Let nulland null be the intensities and null and null be the frequencies for the curves a, b and c respectively
The figure shows the variation of photocurrent with anode potential for a photo-sensitive surface for three different radiations. Let nulland null be the intensities and null and null be the frequencies for the curves a, b and c respectively
Physics-General
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A photon collides with a stationary hydrogen atom in ground state inelastically. Energy of the colliding photon is 10.2 eV. After a time interval of the order of micro second another photon collides with same hydrogen atom inelastically with an energy of 15 eV. What will be observed by the detector
A photon collides with a stationary hydrogen atom in ground state inelastically. Energy of the colliding photon is 10.2 eV. After a time interval of the order of micro second another photon collides with same hydrogen atom inelastically with an energy of 15 eV. What will be observed by the detector
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A proton, a deutron and an a-particle having the same momentum, enters a region of uniform electric field between the parallel plates of a capacitor. The electric field is perpendicular to the initial path of the particles. Then the ratio of deflections suffered by them is
A proton, a deutron and an a-particle having the same momentum, enters a region of uniform electric field between the parallel plates of a capacitor. The electric field is perpendicular to the initial path of the particles. Then the ratio of deflections suffered by them is
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