List of top Physics Questions

In AC circuit Ohm's law is applicable for

The shortest wavelength of $X$-rays coming from an $X$-ray tube depends on the

In Young's double slit experiment, the fringe width with light of wavelength $6000 \,?$ is $3 \,mm$. The fringe width, when the wavelength of light is changed to $4000 \,?$ is

The correct vector relation between linear velocity $ \vec{v} $ and angular velocity $ \vec{\omega } $ in rigid body dynamics is ( where $ \vec{r} $ is the position vector)

The maximum range of a projectile is $ 100\,m $ . The maximum height reached by it is

The given figure gives electric lines of force due to two charges $ q_{1}$ and $q_{2}$ . What are the signs of the two charges?

If the electron in a hydrogen atom jumps from an orbit with level $n_{1} =2$ to an orbit with level $n_{2} =1$ the emitted radiation has a wavelength given by

Atomic mass of $ {{^{13}}_{6}}C $ is 13.00335 amu and its ea-s number is 13.0. If 1 amu = 931 MeV, binding energy of the neutrons present in the nucleus is

A glass slab of thickness 8 cm contains the same number of waves as 10 cm long path of water when both are traversed by the same monochromatic light. If the refractive index of water is $ \frac{4}{3} $ , the refractive index of glass is

A bar magnet having a magnetic movement of $2 \times 10^{4} JT ^{-1}$ is free to rotate in a horizontal plane. A horizontal magnetic field $B =6 \times 10^{-4}$ T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction $60^{\circ}$ from the field is :

When the cold and hot junctions of a thermocouple are interchanged, the thermo emf

$_6C^{14}$ and $7_N^{15}$ are examples of

A stone dropped from the top of a tower reaches ground in 4 s. Height of the tower is $(g = 10 \, m/s^2)$

With the addition of impurities surface tension of a liquid

The square of the resultant of two equal forces acting at a point is equal to three times their product. Angle between them is

A calcite crystal is placed over a dot on a paper sheet and the crystal is rotated. On viewing through the calcite one sees

$n $ type and $p$ type semiconductors can be obtained by doping pure silicon respectively with

Potential energy of two charges $10 \, nC$ each separated by a distance of 0.09 m in air is

Viscosity decreases with increase in temperature is the reason for (i) hot water moving faster than cold water (ii) more viscous oils are used in motor cars during summer than in winter

Quality factor of a series $LCR$ circuit decreases from 3 to 2. Resonant frequency is $600 \, Hz$. Change in band width is

Specific resistance of a conductor material increases with

Power factor of a series $LCR $ circuit is

Distance between two point charges is increased by 20%. Force of interaction between the charges

Proton and $\alpha$ particle have the same deBroglie wavelength. Which one is the same for both of them ?