NEET 2017 PITA
For the following questions answer them individually
The energy liberated per nuclear fission is 200 MeV. If $$10^{20}$$ fissions occur per second the amount of power produced will be
A ball of mass 1 kg is thrown vertically upwards and returns to the ground after 3 seconds. Another ball, thrown at $$60^\circ$$ with vertical also stays in air for the same time before it touches the ground. The ratio of the two heights are
A body initially at rest, breaks up into two pieces of masses 2 M and 3 M respectively, together having a total kinetic energy E. The piece of mass 2 M, after breaking up, has a kinetic energy :
A light beam is incident on a denser medium whose refractive index is 1.414 at an angle of incidence $$45^\circ$$. Find the ratio of width of refracted beam in a medium to the width of the incident beam in air.
A body starts moving unidirectionally under the influence of a source of constant power. Which one of the graph correctly shows the variation of displacement(s) with time (t)?
In an experiment of photoelectric effect the stopping potential was measured to be $$V_1$$ and $$V_2$$ with incident light of wavelength $$\lambda$$ and $$\lambda/2$$ respectively. The relation between $$V_1$$ and $$V_2$$ is
A cell of emf E and internal resistance ‘r’ is connected to a variable external resistor ‘R’. The graph which gives the terminal voltage of cell ‘V’ with respect to R is
A wall consists of alternating blocks of length ‘d’ and coefficient of thermal conductivity $$K_1$$ and $$K_2$$ respectively as shown in figure. The cross sectional area of the blocks are the same. The equivalent coefficient of thermal conductivity of the wall between left and right is:
A common emitter amplifier circuit is shown in the figure below. For the transistor used in the circuit the current amplification factor, $$\beta_{dc} = 100$$ Other parameters are mentioned in the figure.
We find that :
