Physics Test 14...

Figure shows path followed by a particle and position of a particle at any instant. Four different students have represented the velocity vectors and acceleration vectors at the given instant. Which vector diagram can not be true in any situation? (In each figure velocity is tangential to the trajectory).

The mass and linear momentum in two systems of units are related as under: . All the symbols with subscript (1) belong to one system and all the symbols with subscript (2) belong to the other system. x and y are dimensionless constants. U₁ and U₂ are potential energies in two systems of units. Then

There are two bulbs B₁ (P, V), B₂ (P, 2V) their rated power and voltages are mentioned with them. Calculate the ratio of consumed power w₁ and w₂ ?

Spherical shell A  is made up of insulating material and carries electric charge uniformly distributed over its surface while Spherical shell B is made up of conducting material and carries no charge. C₁ and C₂ are centres of Shell A and Shell B respectively. Choose the correct statement :

What is the energy released in process

3 ₂He⁴ → ₆C¹² ?

(Mass of ₂He⁴ = 4.002604 amu, mass of C¹² = 12 amu)

The de-Broglie wave length of an electron in the n^th Bohr orbit is related to the radius R of the orbit as

Consider the nuclear fission reaction w → x + y. What is the Q-value (energy released) of the reaction ?

An intrinsic semiconductor has a hole density of 10¹³ cm^–3 at room temperature. When doped with antimony, the hole density decreased to 10¹¹ cm^–3 at same temperature. The density of majority charge carriers will be :-

There is a prism with refractive index equal to √2 and the refracting angle equal to 30º. One of the refracting surfaces of the prism is polished. A beam of monochromatic light will retrace its path if its angle of incidence over the refracting surface of the prism is :

An object starts moving at an angle of 45° with the principal axis as shown in the figure in front of a biconvex lens of focal length +10 cm. If θ denotes the angle at which image starts to move with principal axis then :