Physics-
General
Easy
Question
If the atom 100Fm257 follows Bohr model and the radius of last orbit of 100Fm257 is n times the Bohr radius, then find n
- 100
- 200
- 4
- 1/4
The correct answer is: 1/4
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he intensity of X-rays from a coolidge tuberin’s plotted against wavelength 
as shown the figure The minimum wavelength found is 
and the wavelength of the 
line is 
As the accelerating voltage is increased
he intensity of X-rays from a coolidge tuberin’s plotted against wavelength as shown the figure The minimum wavelength found is
and the wavelength of the line is As the accelerating voltage is increased
physics-General
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If A= B=C=1 and X =
+
+
, then X=
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The tangent at P to a parabola y2 = 4ax meets the directrix at U and the latus rectum at V then SUV (where S is the focus) :
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Which one of the following equations represented parametrically, represents equation to a parabolic profile ?
Which one of the following equations represented parametrically, represents equation to a parabolic profile ?
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In the circuit shown (Fig). if the diode forward voltage drop is 0.3V, the voltage difference between A and B is :
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A 220V ac supply is connected between points A and B (Fig). What will be the potential difference V across the capacitor?
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In the figure shown the potential drop across the series resistor is
In the figure shown the potential drop across the series resistor is
Physics-General
physics-
Find the effective resistance between A and B
Find the effective resistance between A and B
physics-General
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Two ideal junction diodes D1, D2 are connected as shown in the figure. A 3V battery is connected between A and B. The current supplied by the battery if its positive terminal is connected to A is
Two ideal junction diodes D1, D2 are connected as shown in the figure. A 3V battery is connected between A and B. The current supplied by the battery if its positive terminal is connected to A is
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VA and VB denote potentials of A and B, then the equivalent resistance between A and B in the adjoining circuit is (ideal diode)
VA and VB denote potentials of A and B, then the equivalent resistance between A and B in the adjoining circuit is (ideal diode)
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In the figure shown a long cart moves on a smooth horizontal surface due to an external constant force of magnitude F Initial mass of the cart is M0 and velocity is zero At t = 0 sand starts falling from a stationary hopper on to the cart with negligible velocity at constant rate m kg/s and sticks to the cart.
The velocity of the cart at time t(<t0)
In the figure shown a long cart moves on a smooth horizontal surface due to an external constant force of magnitude F Initial mass of the cart is M0 and velocity is zero At t = 0 sand starts falling from a stationary hopper on to the cart with negligible velocity at constant rate m kg/s and sticks to the cart.
The velocity of the cart at time t(<t0)
Physics-General
physics-
Two bodies have undergone an elastic one–dimensional collision along x–axis Figure is a graph of position versus time for these bodies and for their center of mass.
The mass of the body that was moving faster before the collision is ________ that of other body.
Two bodies have undergone an elastic one–dimensional collision along x–axis Figure is a graph of position versus time for these bodies and for their center of mass.
The mass of the body that was moving faster before the collision is ________ that of other body.
physics-General
physics-
Two bodies have undergone an elastic one–dimensional collision along x–axis Figure is a graph of position versus time for these bodies and for their center of mass.
Which line segment corresponds to the motion of the center of mass before and after the collision?
Two bodies have undergone an elastic one–dimensional collision along x–axis Figure is a graph of position versus time for these bodies and for their center of mass.
Which line segment corresponds to the motion of the center of mass before and after the collision?
physics-General
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A disk A of radius r moving on perfectly smooth surface at a speed v undergoes an elastic collision with an identical stationary disk B. Find the velocity of the disk B after collision if the impact parameter is r/2 as shown in the figure
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physics-General
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A ball of mass 1kg strikes a heavy platform, elastically, moving upwards with a velocity of 5m/s. The speed of the ball just before the collision is 10m/s downwards. Then the impulse imparted by the platform on the ball is
A ball of mass 1kg strikes a heavy platform, elastically, moving upwards with a velocity of 5m/s. The speed of the ball just before the collision is 10m/s downwards. Then the impulse imparted by the platform on the ball is
physics-General
