When two dispalcements represented by
y₁ = asin(ωt) and y2 = b cos(ωt) are superimposed
the motion is :

One mole of an ideal diatomic gas undergoes a
transition from A to B along a path AB as shown
in the figure,

The change in internal energy of the gas during the transition is :

An electron moving in a circular orbit of radius r
makes n rotations per second. The magnetic field
produced at the centre has magnitude :

The interference pattern is obtained with two coherent light sources of intensity ratio n. In the interference pattern, the ratio I_max-I_min/I_max+I_min will be

An air bubble in a glass slab with refractive index 1.5 (near normal incidence) is 5 cm deep when viewed from one surface and 3 cm deep when viewed from the opposite face. The thickness (in cm) of the slab is

Two identical glass (μ_g = 3/2) equiconvex lenses of focal length f each are kept in contact. The space between that two lenses in filled with water (μ_w = 4/3). The focal length of the combination is