Physics-
General
Easy
Question
A man spinning in free space changes the shape of his body, eg. by spreading his arms or curling up. By doing this, he can change his
- moment of inertia
- angular momentum
- angular velocity
- rotational kinetic energy
The correct answer is: moment of inertia
Related Questions to study
physics-
A ladder AP of length 5 m is inclined to a vertical wall is slipping over a horizontal surface with velocity of 2 m/s, when A is at a distance 3m from ground what is the velocity of C.M. at this moment
A ladder AP of length 5 m is inclined to a vertical wall is slipping over a horizontal surface with velocity of 2 m/s, when A is at a distance 3m from ground what is the velocity of C.M. at this moment
physics-General
physics-
Find minimum height of obstacle so that the sphere can stay in equilibrium.
Find minimum height of obstacle so that the sphere can stay in equilibrium.
physics-General
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In a characteristic X– ray spectra of some atom superimposed on continuous X– ray spectra:
In a characteristic X– ray spectra of some atom superimposed on continuous X– ray spectra:
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The electron in hydrogen atom in a sample is in nth excited state, then the number of different spectrum lines obtained in its emission spectrum will be :
The electron in hydrogen atom in a sample is in nth excited state, then the number of different spectrum lines obtained in its emission spectrum will be :
Physics-General
Physics-
In an atom, two electrons move around the nucleus in circular orbits of radii R and 4R. The ratio of the time taken by them to complete one revolution is : (neglect electric interaction)
In an atom, two electrons move around the nucleus in circular orbits of radii R and 4R. The ratio of the time taken by them to complete one revolution is : (neglect electric interaction)
Physics-General
Physics-
Difference between nth and (n +1)th Bohr’s radius of ‘H’ atom is equal to it’s (n–1)th Bohr’s radius. the value of n is:
Difference between nth and (n +1)th Bohr’s radius of ‘H’ atom is equal to it’s (n–1)th Bohr’s radius. the value of n is:
Physics-General
physics-
Consider the following electronic energy level diagram of H-atom: Photons associated with shortest and longest wavelengths would be emitted from the atom by the transitions labelled:
Consider the following electronic energy level diagram of H-atom: Photons associated with shortest and longest wavelengths would be emitted from the atom by the transitions labelled:
physics-General
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de-Broglie wavelength of an electron in the nth Bohr orbit is 
and the angular momentum is Jn , then:
de-Broglie wavelength of an electron in the nth Bohr orbit is and the angular momentum is Jn , then:
Physics-General
Physics-
In a photoelectric experiment, the potential difference V that must be maintained between the illuminated surface and the collector so as just to prevent any electron from reaching the collector is determined for different frequencies f of the incident illumination. The graph obtained is shown. The maximum kinetic energy of the electrons emitted at frequency f1 is
In a photoelectric experiment, the potential difference V that must be maintained between the illuminated surface and the collector so as just to prevent any electron from reaching the collector is determined for different frequencies f of the incident illumination. The graph obtained is shown. The maximum kinetic energy of the electrons emitted at frequency f1 is
Physics-General
Physics-
Two electrons are moving with the same speed v. One electron enters a region of uniform electric field while the other enters a region of uniform magnetic field, then after sometime if the de–Broglie wavelengths of the two are 
, then:
Two electrons are moving with the same speed v. One electron enters a region of uniform electric field while the other enters a region of uniform magnetic field, then after sometime if the de–Broglie wavelengths of the two are , then:
Physics-General
physics-
Four open organ pipes of different lengths and different gases at same temperature as shown in figure. Let fA , fB , fC and fD be their fundamental frequencies then :
Four open organ pipes of different lengths and different gases at same temperature as shown in figure. Let fA , fB , fC and fD be their fundamental frequencies then :
physics-General
physics-
A narrow tube is bent in the form of a circle of radius R, as shown in the figure. Two small holes S and D are made in the tube at the positions right angle to each other. A source placed at S generated a wave of intensity I0 which is equally divided into two parts : One part travels along the longer path, while the other travels along the shorter path. Both the part waves meet at the point D where a detector is placed
The maximum intensity produced at D is given by
A narrow tube is bent in the form of a circle of radius R, as shown in the figure. Two small holes S and D are made in the tube at the positions right angle to each other. A source placed at S generated a wave of intensity I0 which is equally divided into two parts : One part travels along the longer path, while the other travels along the shorter path. Both the part waves meet at the point D where a detector is placed
The maximum intensity produced at D is given by
physics-General
physics-
The figure represents the instantaneous picture of a longitudinal harmonic wave travelling along the negative x-axis. Identify the correct statement(s) related to the movement of the points shown in the figure.
The points of maximum rarefaction are
The figure represents the instantaneous picture of a longitudinal harmonic wave travelling along the negative x-axis. Identify the correct statement(s) related to the movement of the points shown in the figure.
The points of maximum rarefaction are
physics-General
physics-
The figure represents the instantaneous picture of a longitudinal harmonic wave travelling along the negative x-axis. Identify the correct statement(s) related to the movement of the points shown in the figure.
The stationary points are
The figure represents the instantaneous picture of a longitudinal harmonic wave travelling along the negative x-axis. Identify the correct statement(s) related to the movement of the points shown in the figure.
The stationary points are
physics-General
physics-
The figure represents the instantaneous picture of a longitudinal harmonic wave travelling along the negative x-axis. Identify the correct statement(s) related to the movement of the points shown in the figure.
The points moving opposite to the direction of propagation are
The figure represents the instantaneous picture of a longitudinal harmonic wave travelling along the negative x-axis. Identify the correct statement(s) related to the movement of the points shown in the figure.
The points moving opposite to the direction of propagation are
physics-General
