List of top Physics Questions

For a particle performing S.H.M. the displacement - time graph is shown.

For that particle the force - time graph is correctly shown in graph

Out of the following which law obeys the law of conservation of energy?

The electric potential '$V$' is given as a function of distance '$x$' (metre) by $V = (4x^2 + 8x - 3)V$. The value of electric field at $x = 0.5 \text{ m}$, in $\text{V/m}$ is

'$n$' small water drops of same size (radius $r$) fall through air with constant velocity V. They coalesce to form a big drop of radius R. The terminal velocity of the big drop is

A vertical spring oscillates with period 6 second with mass $m$ is suspended from it. When the mass is at rest, the spring is stretched through a distance of (Take, $g = \pi^2 = 10 \text{ m/s}^2$ )

The initial and final temperatures of water as recorded by an observer are $(38.6 \pm 0.2)^\circ\text{C}$ and $(82.3 \pm 0.3)^\circ\text{C}$. The rise in temperature with proper error limits is

In a given logic circuit, the output Y when all the three inputs A, B, C are first low and then high will be respectively

A convex lens of focal length $\frac{1}{3} \text{ m}$ forms a real, inverted image twice the size of the object. The distance of the object from the lens is

A particle performing uniform circular motion of radius $\frac{\pi}{2} \text{ m}$ makes $x$ revolutions in time $t$. Its tangential velocity is

A particle carrying a charge equal to 1000 times the charge on an electron, is rotating one rotation per second in a circular path of radius '$r$' m. If the magnetic field produced at the centre of the path is $x$ times the permeability of vacuum, the radius '$r$' in m is $[e = 1.6 \times 10^{-19} \text{C}] \quad [x = 2 \times 10^{-16}]$

The frequency of a tuning fork is $256 \text{ Hz}$. It will not resonate with the tuning fork of frequency}

The frequency of revolution of an electron in the $n^{\text{th}$ orbit of hydrogen atom is

The resultant of two vectors $\vec{A}$ and $\vec{B}$ is $\vec{C}$. If the magnitude of $\vec{B}$ is doubled, the new resultant vector becomes perpendicular to $\vec{A}$, then the magnitude of $\vec{C}$ is

A long wire with a small current element of length 1 cm is placed at the origin and carries a current of 10 A along the x-axis. The magnitude of the magnetic field, due to the element, on the y-axis at a distance 0.5 m from it, would be

A p-n junction diode without any voltage biasing acts as:

The possible number of energy states in a Ge crystal containing $5\times10^{3}$ atoms is:

A radioactive element with $6\times10^{5}$ atoms initially is left with $0.75\times10^{5}$ undecayed atoms in $48$ years. The half-life is:

In the hydrogen spectrum, the shortest wavelength of the Brackett series is produced during the transition:

Light energy is redistributed in:

An unpolarized light incident on a plane glass surface gets totally polarized on reflection. If the refractive index of glass is $\tan 57^{\circ}$, then the angle of refraction is:

Chromatic aberration arises in thick lenses due to:

An electromagnetic wave travelling in vacuum has its electric field component, $E=15\sin(1.57y+5.4t)\hat{j}$. The wavelength of the wave is:

Which one of the following pairs of charges separated by the same distance r will experience a maximum force?

If the time period of a particle executing SHM is 8 s, then the time period of the potential energy of this particle is