Physics Test 63...

Orbits of a particle moving in a circle are such that perimeter of the orbit equals an integer number of de-Broglie wavelengths of the particle. For a charged particle moving in a plane perpendicular to a magnetic field, the radius of the nth orbital will therefore be proportional to:

A body starts from rest on a long-inclined plane of slope 45º. The coefficient of friction between the body and the plane varies as 𝜇 = 0.3 x, where x is distance travelled down the plane. The body will have maximum speed (for g = 10 m/s²) when x =:

The change in the value of acceleration of earth towards sun, when the moon comes from the position of solar eclipse to the position on the other side of earth in line with sun is:

(mass of the moon = 7.36 × 10²² kg, radius of the moon’s orbit = 3.8 ×10⁸ m).

An ideal gas at atmospheric pressure is adiabatically compressed so that its density becomes 32 times of its initial value. If the final pressure of gas is 128 atmospheres, the value of ‘𝛾’ of the gas is:

The dimensions of angular momentum, latent heat and capacitance are, respectively.