List of practice Questions

The phase velocity of a wave described by the equation $\Psi = \Psi_0 \, \sin (kx + \omega t + \pi / 2)$ is
The polarity of induced emf is given by
A ball is dropped from a height $h$. If the coefficient of restitution is $e$ then to what height will it rise after jumping twice from the ground
The propulsion of a rocket is based on the principle of conservation of
A narrow slit of width $2 \,mm$ is illuminated by monochromatic light of wavelength $500\, nm$. The distance between the first minima on either side on a screen at a distance of $1 \,m$ is
A radioactive sample at any instant has its disintegration rate $5000$ disintegrations per minute. After $5\, min$, the rate becomes $1250$ disintegration per minute. Then, its decay constant (per minute) is
A rubber cord of density $d,$ Young?s modulus $Y$ and length $L$ is suspended vertically. If the cord extends by a length $0.5\, L$ under its own weight, then $L$ is
A small spherical ball falling through a viscous medium of negligible density has terminal velocity $v$. Another ball of the same mass but of radius twice that of the earlier falling through the same viscous medium will have terminal velocity
Aluminium (atomic mass = $27$) crystallizes in a cubic system with edge length of $4 \, ?$. Its density is $2.7 \,g \,cm^{-3}$. The number of aluminium atoms present per unit cell is
Identify the wrong statement
The amount of charge flowing per second per unit area normal to the flow is called
The Carnot cycle of a reversible heat engine consists of
The depth $d$ at which the value of acceleration due to gravity becomes $\frac {1} { n}$ time the value at the surface is (R be the radius of the earth)
The magnification of an image by a convex lens is positive only when the object is placed
The molecular geometry of $BF_3$ is
Sangers reagent is used for the identification of:
The number of photons emitted per second by a $60\, W$ source of monochromatic light of wavelength $663\, nm$ is $ (h=6.63\times {{10}^{-34}}Js) $
The power factor of $LCR$ circuit at resonance is

Find the missing number:
5, 8, 28, 162, ?, 12870

Find the Odd man out.

396, 462, 572, 427, 671, 264

Problem Figure:

the figure matrix

Chef is related to Restaurant in the same way as Druggist is related to

Find the odd man out.
2, 5, 10, 17, 26, 37, 50, 64

If the alphabets are written in the sequence of a, bb, ccc, dddd, eeeee, ffffff, …. What will be the 120th letter?

Find the odd man out.
331, 482, 551, 263, 383, 362, 284