List of top Physics Questions

In refraction, light waves are bent on passing from one medium to the second medium, because in the second medium
After 2 h $\frac{1}{16} th $ of initial amount of a certain radioactive isotope remains undecayed. The half-life of the isotope is
$10\, g$ of ice at $0^{\circ}\,C$ is mixed with $100\, g$ of water at $50^{\circ}\,C$. What is the resultant temperature of mixture?
A bomb explodes on the moon. How long will it take for the sound to reach the earth?
Lateral shift produced by a glass slab is X. When the slab is immersed in a liquid, for the same incident ray lateral shift produced will be
In Sommerfeld's atomic model, corres ponding to principal quantum number $n = 3$, there will be
Diameter of $8^{th}$ dark ring in Newton's rings system viewed normally in reflected light of wavelength $5000 \mathring A $ is 4 mm. Radius of curvature of convex surface in contact with the glass plate is
When a thin transparent plate of refractive index 1.5 is introduced in the path of one of the interfering beams, 20 fringes shift. If the plate is replaced by another plate of refractive index 1.6 and half the thickness, the number of fringes that are displaced is
Air is blown .between .two suspended balls. Then
Rise of the oil in the wick of a lampis due to
Work done in rotating a bar magnet from 0 to angle $ \text{ }\!\!\theta\!\!\text{ } $ is:
An open U-tube contains mercury. When $11.2 \,cm$ of water is poured into one of the arms of the tube, how high does the mercury rise in the other arm form its initial level?
The escape velocity of a projectile on the earths surface is $ 11.2\,\,km{{s}^{-1}} $ . A body is projected out with thrice this speed. The speed of the body far away from the earth will be:
In the given figure the pulley is assumed massless and frictionless. If the friction force on the object of mass m is $ f $ , then its acceleration in terms of the force $F$ will be equal to:
A can is moving horizontally along a straight line with constant speed $30\, m/s$. A projectile is to be fired from the moving cart in such a way that it will return to the cart after the cart has moved $80 \,m$. At what speed (relative to the can) must the projectile be fired? (Takes $ =10\,m/{{s}^{2}} $ )
The magnetic field amplitude of an electromagnetic wave is $ 2\times {{10}^{-7}}T $ , Its electric field amplitude, if the wave is travelling in free space is:
In the first second of its flight, rocket ejects 1/60 of its mass with a velocity of $ 2400\,\,m{{s}^{-1}} $ . The acceleration of the rocket is:
A body starts from rest with an uniform acceleration. If its velocity after $n$ seconds is $v$, then its displacement in the last $2\,s$ is
In $LCR$ circuit $ {f = \frac{ 50 }{ \pi} \, Hz, V = 50 \, volt, R = 300 \, \Omega}$ . If $L = 1 \, H$ and $C = 20 \, \mu \, C$, then voltage across capacitor is
Which one has highest binding energy per nucleon?
A block of mass $10\, kg$ is placed on rough horizontal surface whose coefficient of friction is $0.5$. If a horizontal force of $100 \,N$ is applied on it, then acceleration of the block will be :-
A person sees clearly at a distance of 100 cm, then power of lens used to see object at 40 cm is
Which of the following statements is true for an n-type semiconductor?
The motion of a particle varies with time according to the relation $ y=a(\sin \omega t+\cos \omega t) $
The image of a small electric bulb fixed on the wall of a room is to be obtained on the opposite wall $4\, m$ away by means of a large convex lens. The maximum possible focal length of the lens required for this purpose will be: