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

A drum of radius R and mass M, rolls down without slipping along an inclined plane of angle \(\theta\) .The frictional force 

Imagine a new planet having the same density as that of earth but it is 3 times bigger than the earth in size. If the acceleration due to gravity on the surface of earth is g and that on the surface of the new planet is g', then :
A network of four capacitors of capacity equal to C1=C,C2=2C,C3=3C and C4=4C are connected to a battery as shown in the figure. The ratio of the charges on C2 an C4 is
A network of four capacitors of capacity equal to C1=C,C2=2C,C3=3C and C4=4C
Which of the following circular rods,(given radius r and length l)each made of the same material and whose ends are maintained at the same temperature will conduct most heat?
In the reaction \(^2_1H+^3_1H\) \(\rightarrow\) \(^4_2He+^1_0n,\) if the binding energies of \(^2_1H\), \(^3_1H\) and \(^4_2He\) are respectively a, b and c (in MeV), then the energy (in MeV) released in this reaction is:
Energy levels A,B and C of a certain atom correspond to increasing values of energy i.e., EA<EB<EC. If \(\lambda_1,\lambda_2\) and \(\lambda_3\) are wavelengths of radiations corresponding to transitions C to B,B to A and C to A respectively, which of the following relations is correct ?
The work functions for metals A,B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein's equation, the metals which will emit photoelectrons for a radiation of wavelength 4100 Å is/are:
The nuclei of which one of the following pairs of nuclei are isotones?
The circular motion of a particle with constant speed is:
A particle executing simple harmonic motion of amplitude 5 cm has maximum speed of 31.4 cm/s. The frequency of its oscillation is:
Which of the following processes is reversible?
The temperature of inversion of a thermocouple is 620°C and the neutral temperature is 300°C.what is the temperature of cold junction?
Fission of nuclei is possible because the binding energy per nucleon in them:
The ratio of the dimensions of Planck's constant and that of the moment of inertia is the dimension of:
Application of a forward bias to a p-n junction:

The displacement x of a particle varies with time t as \(x=ae^{-  \alpha t} + be ^{\beta t}\), where \(a,b,\) \(\alpha\) and \(\beta\) are positive constants. The velocity of the particle will:

Two charges q1 and q2 are placed 30 cm apart, as shown in the figure. A third charge q3 is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy of the system is\(\bigg(\frac{q_3}{4\pi\in_0}\bigg)k\),where k is:

wo charges q1 and q2 are placed 30 cm apart
In any fission process the ratio (mass of fission products/mass of parent nucleus) is :