Physics-
General
Easy
Question
Find the moment of inertia of a plate cut in shape of a right angled triangle of mass M, side AC = BC = a about an axis perpendicular to the plane of the plate and passing through the mid point of side AB
The correct answer is:
Related Questions to study
physics-
A block of mass m is attached to a pulley disc of equal mass m, radius r by means of a slack string as shown. The pulley is hinged about its centre on a horizontal table and the block is projected with an initial velocity of 5 m/s. Its velocity when the string becomes taut will be
A block of mass m is attached to a pulley disc of equal mass m, radius r by means of a slack string as shown. The pulley is hinged about its centre on a horizontal table and the block is projected with an initial velocity of 5 m/s. Its velocity when the string becomes taut will be
physics-General
physics-
A point mass mA is connected to a point mass mB by a massless rod of length l as shown in the figure. It is observed that the ratio of the moment of inertia of the system about the two axes BB and AA, which is parallel to each other and perpendicular to the rod is 
The distance of the centre of mass of the system from the mass A is
A point mass mA is connected to a point mass mB by a massless rod of length l as shown in the figure. It is observed that the ratio of the moment of inertia of the system about the two axes BB and AA, which is parallel to each other and perpendicular to the rod is The distance of the centre of mass of the system from the mass A is
physics-General
Physics-
An electron in hydrogen atom first jumps from second excited state to first excited state and then, from first excited state to ground state. Let the ratio of wavelength, momentum and energy of photons in the two cases be x, y and z, then select the wrong answer/(s):
An electron in hydrogen atom first jumps from second excited state to first excited state and then, from first excited state to ground state. Let the ratio of wavelength, momentum and energy of photons in the two cases be x, y and z, then select the wrong answer/(s):
Physics-General
Physics-
The radioactivity of a sample is R1 at time T1 and R2 at time T2. If the half life of the specimen is T. Number of atoms that have disintegrated in time (T2 – T1) is proportional to
The radioactivity of a sample is R1 at time T1 and R2 at time T2. If the half life of the specimen is T. Number of atoms that have disintegrated in time (T2 – T1) is proportional to
Physics-General
Physics-
A radioactive material of half-life T was produced in a nuclear reactor at different instants, the quantity produced second time was twice of that produced first time. If now their present activities are A1 and A2 respectively then their age difference equals:
A radioactive material of half-life T was produced in a nuclear reactor at different instants, the quantity produced second time was twice of that produced first time. If now their present activities are A1 and A2 respectively then their age difference equals:
Physics-General
Physics-
The “
” X-rays emission line of tungsten occurs at l = 0.021 nm. The energy difference between K and L levels in this atom is about
The “” X-rays emission line of tungsten occurs at l = 0.021 nm. The energy difference between K and L levels in this atom is about
Physics-General
physics-
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:
physics-General
Physics-
When a hydrogen atom, initially at rest emits, a photon resulting in transition n = 
= 1, its recoil speed is about
When a hydrogen atom, initially at rest emits, a photon resulting in transition n = = 1, its recoil speed is about
Physics-General
Physics-
Electron in a hydrogen atom is replaced by an identically charged particle muon with mass 207 times that of electron. Now the radius of K shell will be
Electron in a hydrogen atom is replaced by an identically charged particle muon with mass 207 times that of electron. Now the radius of K shell will be
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
Physics-
In a photoelectric experiment, electrons are ejected from metals X and Y by light of intensity I and frequency f. The potential difference V required to stop the electrons is measured for various frequencies. If Y has a greater work function than X; which one of the following graphs best illustrates the expected results?
In a photoelectric experiment, electrons are ejected from metals X and Y by light of intensity I and frequency f. The potential difference V required to stop the electrons is measured for various frequencies. If Y has a greater work function than X; which one of the following graphs best illustrates the expected results?
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
Maths-
then I equals
then I equals
Maths-General
Maths-
dx is equal to
dx is equal to
Maths-General
Maths-
then A+B+C is equal to
then A+B+C is equal to
Maths-General
