List of top Physics Questions

The equivalent resistance between the points P and Q in the network shown in the figure is given by:

Some physical constants are given in List 1 and their dimensional formulae are given in List 2.Match the correct pairs in the lists:

Which is not the unit of electric field?

Which of the following rays can be polarised?

Quantum nature can prove :

Huygens wave theory cant explain:

Vector which is perpendicular to $ a\,\cos \,\theta \,\hat{i}+b\,\sin \,\theta \,\,\hat{j} $ is

The condition for a uniform spherical mass $m$ of radius $r$ to be a black hole is : $[G=$ gravitational constant and $g=$ acceleration due to gravity]

From the top of a tower of two stones, whose masses are in the ratio $1 : 2$ are thrown on straight up with an initial speed $u$ and the second straight down with the same speed $u$. Then neglecting air resistance :

Electron of mass $m$ and charge $q$ is travelling with a speed $v$ along a circular path of radius $r$ at right angles to a uniform magnetic field of intensity $B$. If the speed of the electron is doubled and the magnetic field is halved the resulting path would have a radius:

The induction coil works on the principle of :

The disc of a siren containing $60$ holes rotates at a constant speed of $360\, rpm$. The emitted sound is in unison with a tuning fork of frequency :

If a liquid does not wet glass, its angle of contact is :

An electron moves at right angle to a magnetic field of $1.5 \times 10^{-2} T$ with a speed of $6 \times 10^{7} m / s$. If the specific charge of the electron is $1.7 \times 10^{11} C / kg$. The radius of the circular nath will he

Infrared radiation was discovered in $1800$ by :

The work done in carrying a charge $q$ once round a circle of radius $r$ with a charge $Q$ at the centre is :

In a circuit L, C and R are connected in series with an alternating voltage source of frequency f .The current leads the voltage by 45$^{\circ}$. The value of C is

The wave theory of light, in its original form, was first postulated by-

In Young's double slit experiment intensity at a point is (1/4) of the maximum intensity. Angular position of this point is

A sphere of diameter $0.2\,m$ and mass $2\, kg$ is rolling on an inclined plane with velocity $ \upsilon =0.5\, m/s$. The kinetic energy of the sphere is:

A circular coil of $20$ turns and radius $10 \,cm$ is placed in uniform magnetic field of $ 0.10\,T $ normal to the plane of the coil. If the current in coil is $5 \,A$, then the torque acting on the coil will be

An automobile travelling at 50 km/h, can be stopped at a distance of 40 m by applying brakes. If the same automobile is travelling at 90 km/h, all other conditions remaining same and assuming no skidding, the minimum stopping distance in metres is:

An ideal gas is taken from point $ A $ to the point $ B $ , as shown in the $ p-V $ diagram, keeping the temperature constant. The work done in the process is :

The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 $\mathring{A}$ is of the order of