JEE Advanced - Physics Mock Tests

Two infinitely long straight parallel wires carry equal currents I in opposite directions. The wires are separated by distance 2a. Find the magnitude of the magnetic field at the midpoint between the two wires.

The de Broglie wavelength of a particle is given by (where p is the momentum):

In a Young double slit experiment, the slit separation is d and the screen is at distance D from the slits (D ≫ d). If the wavelength is changed from λ to λ + Δλ (where Δλ ≪ λ), the shift in the position of the m-th bright fringe is approximately:

A uniform circular disk of mass M and radius R has a circular hole of radius R/√2 cut out from it, concentric with the disk. The moment of inertia of the remaining portion about an axis through the center and perpendicular to the plane is:

A satellite is orbiting the Earth in a circular orbit at a height h above the Earth's surface. If h << R (radius of Earth), the orbital velocity of the satellite is approximately: (Take g = acceleration due to gravity at Earth's surface)

A wire of length L and cross-sectional area A is stretched by an amount ΔL within the elastic limit. The elastic potential energy stored per unit volume is:

A star of mass M and radius R collapses to form a neutron star of radius R/100. If angular momentum is conserved, the new rotation period is:

In a meter bridge experiment, the null point is found at 40 cm from the left end when resistor R is in the left gap and S is in the right gap. If R and S are interchanged, the new null point will be at: