List of practice Questions

A particle of mass $0.3\, kg$ is subjected to a force $F = - kx$ with $k = 15\, N/m$. What will be its initial acceleration, if it is released from a point $20\, cm$ away from the origin ?
The block of mass $M$ moving on the frictionless horizontal surface collides with the spring of spring constant $k$ and compresses it by length $L$. The maximum
If '$S$' is stress and '$Y$' is Young?s modulus of material of a wire, the energy stored in the wire per unit volume is:
A $20\, cm$ long capillary tube is dipped in water. The water rises up to $8\, cm$. If the entire arrangement is put in a freely falling elevator, the length of water column in the capillary tube will be:
The upper half of an inclined plane with inclination $\phi$ is perfectly smooth, while the lower half is rough. A body starting from rest at the top will again come to rest at the bottom, if the coefficient of friction for the lower half is given by:
A bullet fired into a fixed target loses half of its velocity after penetrating $3\,cm$. How much further it will penetrate before coming to rest, assuming that it faces constant resistance to motion ?
In a common base amplifier, the phase difference between the input signal voltage and output voltage is:
If the equation of motion of standing waves is $y=0.3 \sin (314\, t-1.57\, x)$, then the velocity of standing wave will be :
A black body is heated from $27^{\circ} C$ to $927^{\circ} C$ the ratio of radiations emitted will be :
A boy of $50\, kg$ is standing in a left moving down with acceleration $ 9.8\,m/s^{2}$ . The apparent weight of the boy is:
The weight of an object at earth's surface is $700\, g\, wt$. What will be its weight at the surface of a planet whose radius is $1 / 2$ and mass is $1 / 7$ of that of the earth ?
Out of the given bodies (of same mass) for which the moment of inertia will be maximum about the axis passing through its centre of gravity and perpendicular to its plane?
A $120\, m$ long train is moving towards west with a speed of $10\, m / s$. A bird flying towards east with a speed of $3\, m / s$ crosses the train. The time taken by the bird to cross the train will be :
The velocity of all radio waves in free space is $3 \times 10^{8} m / s$. The frequency of a radio wave of wavelength $150\, m$ is :
In Hall's process the main reagent is mixed with:
A gas can be liquefied :
If a substance with half-life $3$ days is taken at other place in $12$ days, what amount of substance is left now ?
If $0.1\, M$ of a weak acid is taken and its percentage of degree of ionization is $1.34 \%$, then its ionization constant will be :
Among the following pairs of ions, the lower oxidation state in aqueous solution is more stable than the other, in
An aqueous solution of $CoCl_2$ on addition of excess of concentrated $HCl$ turns blue due to formation of
In which of the following pairs both the complexes show optical isomerism?
In diborane, the two $H-B-H$ angles are nearly :
Among the following molecules (i)$\overset{\bullet \bullet}{Xe}O_{3}$ (ii)$\overset{\bullet \bullet}{Xe}OF_4$ (iii)$\overset{\bullet \bullet}{Xe}F_6$ those having same number of lone pairs on $Xe$ are
: $SeCl_4$ does not have a tetrahedral structure. :$Se$ in $SeCl_4$ has two lone pairs.
Which one of the following statements is true for protein synthesis (translation)?