NEET 2019

Average velocity of a particle executing SHM in one complete vibration is :

The displacement of a particle executing simple harmonic motion is given by
$$y = A_0 + A \sin \omega t + B \cos \omega t$$
Then the amplitude of its oscillation is given by:

A small hole of area of cross-section $$2 mm^2$$ is present near the bottom of fully filled open tank of height 2m. Taking $$g = 10 m/s^2$$, the rate of flow of water through the open hole would be nearly :

Two parallel infinite line charges with linear charge densities $$+ \lambda C/m$$ and $$-\lambda C/m$$ are placed at a distance of 2R in free space. What is the electric field mid-way between the two line charges ?

Two particles A and B are moving in uniform circular motion in concentric circles of radii $$r_A and r_B$$ with speed $$v_A and v_B$$ respectively. Their time period of rotation is the same. The ratio of angular speed of A to that of B will be:

A 800 turn coil of effective area $$0.05 m^2$$ is kept perpendicular to a magnetic field $$5 \times 10^{-5} T$$. When the plane of the coil is rotated by $$90^\circ$$ around any of its coplanar axis in 0.1 s, the emf induced in the coil will be:

Which colour of the light has the longest wavelength ?

The total energy of an electron in an atom in an orbit is -3.4 eV. Its kinetic and potential energies are, respectively:

$$\alpha$$- particle consists of :

A body weighs 200 N on the surface of the earth. How much will it weigh halfway downto the centre of the earth ?