There are two sources kept at distances 2λ apart. A large screen is perpendicular to the line joining the sources. Number of maxima on the screen in this case (λ= wavelength of light) is
Two concentric conducting spherical shells A and B having radii rA and rB (rB > rA) are charged to QA and -QB (|QB| > |QA|). The electric field along a line passing through the centre is
Two plano-convex lenses (1 and 2) of glass of refractive index 1.5 have radii of curvature 25cm and 20cm. They are placed in contact with their curved surfaces towards each other and the space between them is filled with liquid of refractive index 4/3. The combination is:
A meter bridge is set up as shown, to determine an unknown resistance X using a standard 10Ω resistance. The balance point is obtained when tapping key is at 52cm mark. The end corrections are 1cm and 2cm respectively for the ends A and B. The determined value of X is
A disk of radius a/4 having a uniformly distributed charge -6C is placed in the x-y plane with its centre at (-a/2,0,0). A rod of length a carrying a uniformly distributed charge 8C is placed on the x-axis from x = a/4 to x = 5a/4. Two point charges -7C and 3C are placed at (-a/4,0,0) and (-3a/4,3a/4,0), respectively. Consider a cubical surface formed by six surfaces x=± a/2, y=± a/2, z=± a/2. The electric flux through this cubical surface is
On a hypotenuse of a right prism (30^∘-60^∘-90^∘) of refractive index 1.50, a drop of liquid is placed as shown in figure. Light is allowed to fall normally on the short face of the prism. In order that the ray of light may get totally reflected, the maximum value of refractive index of the liquid is
The following figure depicts a circular motion. The radius of the circle, the period of revolution, the initial position and the sense of revolution are indicated on the figure. The simple harmonic motion of the x-projection of the radius vector of the rotating particle P can be shown as:
Two conducting shells of radius a and b are connected by a conducting wire as shown in figure. The capacity of system is:
One mole of an ideal gas is taken from state A to state B by three different processes, (i) ACB (ii) ADB (iii) AEB as shown in the P-V diagram. The heat absorbed by the gas is
Two heavy spheres, each of radius r, are in equilibrium within a smooth cup of radius 3r. The ratio of reaction between the cup and one sphere and that between the two spheres is
The basic magnetization curve for a ferromagnetic material is shown in figure. Then the value of relative permeability is highest for the point
In the circuit given below, V(t) is the sinusoidal voltage source. Voltage drop VAB(t) across the resistance R is
E^∘ for the cell, Zn|Zn²+(aq)||Cu²+(aq)|Cu is 1.10V at 25^∘C. The equilibrium constant of the reaction Zn + Cu²+(aq) rightleftharpoons Cu + Zn²+(aq) is of the order of
In the following structures, which two forms are staggered conformations of ethane?
The correct statement about the compounds A, B and C shown is
