List of top Physics Questions

A uniform wire of resistance $R$, of the radius $r$ is uniformly drawn until its radius is reduced to $r/ n$, Its new resistance is

A resistor of $6 \, k \Omega$ with tolerance $10\%$ and another resistance of $4\, k \Omega$ with tolerance $10\%$ are connected in series. The tolerance of the combination is about

An object of mass 0.2 kg executes simple harmonic motion along $x$-axis with frequency of 25/$\pi$ Hz. At the position $x$ = 0.04 m, the object has a kinetic energy of 0.5 J and potential energy of 0.4 J. The amplitude of oscillation is equal to

A wooden block performs SHM on a frictionless surface with frequency $v_0$. The block carries a charge $+Q$ on its surface. If now a uniform electric field $E$ is switched-on as shown, then the $SHM$ of the block will be

A point mass is subjected to two simultaneous sinusoidal displacements in x-direction, $ x_1 (t) = A sin \omega t $ and $x_2(t) = Asin\bigg( \omega t + \frac{ 2 \pi }{ 3} \bigg) $ Adding a third sinusoidal displacement $x_3(t)=B sin(\omega l + \Phi) $ brings the mass to a complete rest. The values of B and $\Phi $ are

A person measures the time period of a simple pendulum inside a stationary lift and finds it to be $T$. If the lift starts accelerating upwards with an acceleration $g/3$, the time period of the pendulum will be

During the phenomenon of resonance

The potential energy of a weightless spring compressed by a distance a is proportional to

A spring of force constant $k $ is cut into two pieces such that one piece is double the length of the other. Then the longer piece will have a force constant of

A particle at the end of a spring executes simple harmonic motion with a period $T_1$, while the corresponding period for another spring is $T_2$ . If the period of oscillation with the two springs in parallel is $T$, then

Which one of the following represents simple harmonic motion?

If maximum speed of a particle in SHM is given by $V_m$, what is its average speed?

In simple harmonic motion, loss of kinetic energy is proportional to

Which of the following equation does not represent a SHM?

Two pendulum have time period T and $ \frac{5T}{4} $ they start SHM at the same time form the mean position. What will be the phase difference between them after the bigger pendulum completed one oscillation

An open pipe of length 33 cm resonates with frequency of 1000 Hz. If the speed of sound is $ 333\,m{{s}^{-1}}, $ then this frequency is

In a simple pendulum the breaking strength of the string is double the weight of the bob. The bob is released from rest when the string is horizontal. The string breaks when it makes an angle $ \theta $ With the vertical

Two pendulums of lengths 100 cm and 121 cm start vibrating. At some instant the two are at the mean position in the same phase. After how many vibrations of the longer pendulum will the two be in the same phase at the mean position again?

A child swinging on a swing in sitting position, stands up, then the time period of swing will

The fundamental frequency of a closed pipe is 220 Hz. If $\frac{1}{4}$ of the pipe is filled with water, the frequency of the first overtone of the pipe now is

The unit of physical quantity obtained integral of electric field is

Charge $q_2$ of mass m revolves around a stationary charge $q_1$ in a circular orbit of radius r. The orbital periodic time of $ q_2 $ would be

There exists an electric field of 1 N/C along $Y$ direction. The flux passing through the square of 1 m placed in $XY$ plane inside the electric field is

A spherical conducting shell of inner radius $r_{1}$ and outer radius $r_{2}$ has a charge $Q$. A charge $-q$ is placed at the centre of the shell. The surface charge density on the inner and outer surfaces of the shell will be

Among the following, the correct graphical representation of electric intensity as a function of distance from the centre of a uniformly charged conducting sphere is shown in