List of top Physics Questions

A point charge causes an electric flux of $ -1.0 x\times 10^3 \, Nm^ 2 \, C^{-1} $ to pass through a spherical Gaussian surface of 10.0 cm radius centred on the charge. If the radius of the Gaussian surface were three times, how much flux would pass through the surface?

A stationary bomb explodes into two parts of masses in the ratio of $ 1:3 $ . If the heavier mass moves with a velocity $ 4\,m/s, $ what is the velocity of lighter part?

When a metal conductor connected to the left gap of a meter bridge is heated, the balancing point

A dielectric of dielectric constant $K$ is introduced such that half of its area of a capacitor of capacity $C$ is occupied by it. The new capacity is

If distance between earth and sun become four times then time period becomes

In Young?? double slit experiment with sodium vapour lamp of wavelength 589 nm and the slits 0.589 mm apart, the half angular width of the central maximum is

A shell of mass $20\,kg$ at rest explodes into two fragments whose masses are in the ratio $2 : 3$. The smaller fragment moves with a velocity of $6 \,m/s$. The kinetic energy of the larger fragment is

The potential of the electric field produced by a point charge at any point $(x, y, z)$ is given by $V= 3x^{2} + 5$ , where $x, y, z$ are in metres and $V$ is in volts. The intensity of the electric field at $(-2,1,0)$ is

In Raman effect, Stoke's lines are spectral lines having

The equation to two circles which touch the Y-axis at $(0, 3)$ and make an intercept of $8$ units on X-axis are

Two condensers, one of capacity \(C\) and the other capacity \(\frac{C}{2}\) are connected to a \(V\) -volt battery, as shown in the figure. 

The work done in charging fully both the condensers is

Two satellites of earth, $ S_1 $ and $ S_2 $ , are moving in the same orbit. The mass of $ S_1 $ is four times the mass of $ S_2 $ . Which one of the following statements is true ?

The principle of $LASER$ action involves

Light from two coherent sources of the same amplitude $A$ and wavelength $\lambda$ illuminates the screen. The intensity of the central maximum is $I_0$. If the sources were incoherent, the intensity at the same point will be

A prism of a certain angle deviates the red and blue rays by $8^\circ$ and $12^\circ$ respectively. Another prism of the same angle deviates the red and blue rays by $10^\circ$ and $14^\circ$ respectively. The prisms are small angled and made of different materials. The dispersive powers of the materials of the prisms are in the ratio

A small coin is resting on the bottom of a beaker filled with liquid. A ray of light from the coin travels upto the surface of the liquid and moves along its surface. How fast is the light travelling in the liquid?

Curie-Weiss law is obeyed by iron

$N$ identical drops of mercury are charged simultaneously to $ 10 \,V $ . When combined to form one large drop, the potential is found to be $ 40\, V $ , the value of $ N $ is

Modulation is the process of superposing

The dimensional formula for impulse is

The maximum height attained by a projectile when thrown at an angle $\theta $ with the horizontal is found to be half the horizontal range. Then $\theta $ =

The de Broglie wavelength of a proton (charge = $1.6\times10^{-19}C$ mass = $1.6\times10^{-27} kg)$ accelerated through a p.d of $1\, kV$ is

Minority carriers in a $p-type$ semiconductor are

The gases carbon-monoxide $ (CO) $ and nitrogen at the same temperature have kinetic energies $ E_1 $ and $ E_2 $ respectively. Then

The potential energy of a simple harmonic oscillator, when the particle is half way to its end point is (where $ E $ is the total energy)