List of top Physics Questions

A simple pendulum has time period $T_1$. The point of suspension is now moved upward according to the relation $y = kt^2, (k = 1ms^{-2})$ where y is the vertical displacement. The time period now becomes $T_2$. The ratio of $\frac{T^2_1}{T^2_2}$ is $(Take\,g = 10ms^{-2})$

Two simple pendulums whose lengths are $100\, cm$ and $121\, cm$ are suspended side by side. Their bobs are pulled together and then released. After how many minimum oscillations of the longer pendulum, will be the two be in phase again?

A body executing SHM has its velocity $10\, cm/s$ and $7\, cm/s$, when its displacements from the mean position are $3\, cm$ and $4 \,cm$, respectively The length of path is :

The displacement of a particle performing simple harmonic motion is given by, x=8sin$\omega t+6cos \omega t$, where distance is in cm and time is in second. The amplitude of motion is

The minimum phase difference between two simple harmonic oscillations, $ \, \, \, \, \, \, \, \, y_1 =\frac{1}{2}sin \omega t +\frac{\sqrt 3}{2} cos \omega t$ $ \, \, \, \, \, \, \, \, \, \, \, y_2 =sin \omega t +cos \omega t$ is

Consider the following statements : The total energy of a particle executing simple harmonic motion depends on its : (I) amplitude (II) period (III) displacement Of these statements :

The maximum velocity of a simple harmonic motion represented by $ y=3\sin \left( 100\,t+\frac{\pi }{6} \right)m $ is given by:

A particle executing SHM has amplitude $0.01$ and frequency $60\, Hz$. The maximum acceleration of the particle is:

Which of the following functions represents a simple harmonic oscillation?

A spring has length $l$ and spring constant $k$ . If spring is divided in two equal parts then spring constant of each part is

If a simple harmonic motion is represented by $\frac{d^{2}x}{dt^{2}}+\alpha\,x=0,$ its time period is :

In simple harmonic motion maximum velocity is at

When the kinetic energy of a body executing S.H.M. is $1 / 3$ of the potential energy. The displacement of the body is $x$ percent of the amplitude, where $x$ is :

The length of second's pendulum is $1\, m$ on earth. If mass and diameter of a planet is doubled than that of earth, then its length becomes:

A charged ball $B$ hangs from a silk thread $S$, which makes an angle $\theta$ with a large charged conducting sheet $P$, as shown in the figure. The surface charge density $\sigma$ of the sheet is proportional to:

Two identical metal spheres with charges $2Q$ and $-Q$ are separated by a distance. Force between them is F. They are connected by a conducting wire and then removed. Force between them now is

Which of the following is not the property of equipotential surfaces?

An ice-cube of density $900\, kg / m ^{3}$ is floating in water of density $1000\, kg / m ^{3}$. The percentage of volume of ice-cube outside the water is

The factor responsible for lower mercury level ina capillary tube is

$700\, pF$ capacitor is charged by $50\, V$ battery. Electrostatic energy is stored by it will be :

The charge on capacitors in the following figure is

A fully charged capacitor has a capacitance $'C'$. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity $s$ and mass $m$. If the temperature of the block is raised by $\Delta T$, the potential difference $V$ across the capacitance is:

A parallel plate capacitor is made by stacking $n$ equally spaced plates connected alternatively. If the capacitance between any two adjacent plates is $C$, then the resultant capacitance is :

Two thin wire rings each having a radius $R$ are placed at a distance $d$ apart with their axes coinciding. The charges on the two rings are $+ q$ and $- q$. The potential difference between the centres of the two rings is :

The figure shows a system of two concentric spheres of radii $r_1$, and $r_2$ and kept at temperatures $T_1$ and $T_2$, respectively. The radial rate of flow of heat in a substance between the two concentric spheres, is proportional to :