List of top Physics Questions

In the diffraction pattern due to a single slit, the width of the central maximum will be:
The minimum number of lines in a plane diffraction grating required to just resolve the sodium doublet (5890 Å and 5896 Å) in first order is:
In a plane transmission grating, the angle of diffraction for the second-order principal maxima for wavelength \( 5000 \) Å is \( 30^\circ \). The number of lines per cm of the grating surface is:
When a single slit is replaced by a double-slit arrangement, the intensity of the central maximum is increased by:
Circularly polarized light is produced if the amplitudes of the ordinary and extraordinary rays are equal and there is a phase difference of:
In Newton’s rings experiment with two different media between the glass surfaces, the nth rings have diameters as 10:7. The ratio of the refraction indices of two media are:
In interference with coherent sources, the fringe width varies as:
The radius of the first zone in a zone plate of focal length 40 cm for light of wavelength 4000 Å is:
If a black body radiation enclosure expands, so that its volume becomes 64 times, the temperature of the enclosure becomes:
Broad sources are required in:
A movable mirror of Michelson’s interferometer is moved through a distance of 0.06 mm. If 200 fringes cross the field of view, the wavelength of light is:
In the inversion curve for a gas, in the region of cooling:
At constant temperature, the internal energy of a Van der Waals gas:
Specific heat of saturated steam is:
Which of the following statements is correct?
Which of the following is not correct for the first order phase transition?
States of thermodynamic equilibrium can be described in terms of:
The ratio of isobaric volume expansivity and isothermal compressibility is given as:
During a quasi-static process:
Mathematical formulation of the first law contains the idea of:
One liter atmosphere equals:
At \( 4^\circ C \) for water, \( C_P = C_V \) because:
If in a capillary tube the rate of flow of a liquid is measured by collecting 100 ml of liquid in 100 sec in a measuring flask. If the least count of the volume of the measuring flask be 1 ml and the least count of the stop watch used for measuring the time be 0.01 sec, then the uncertainty in the rate of flow of the liquid will be:
If two cylinders (one hollow and other solid) of same length, mass, and material are given, then, to twist the cylinders through the same angle:
In a ballistic galvanometer, \( \theta_0 \) be the throw in the absence of damping and \( \theta_1 \) be the first throw after \( \frac{T}{4} \) sec (where \( T \) is the time period of oscillations). The correct relation between \( \theta_0 \), \( \theta_1 \) & logarithmic decrement \( \lambda \) of the galvanometer will be: