List of top Physics Questions

In case of myopic defect, the image is formed
If R1 and R2 are the radii of curvature, n is the refractive index and f is the focal length, then the lens maker's formula is given by
Which among the following pairs represents optically transparent and opaque media?
A convex lens gives a virtual image when the object is placed on the principal axis
A lens bounded by two spherical surfaces curved inwards is
If \(\frac{y}{4}\) and are the object and image distances due to a convex lens respectively, then its focal length is 
The symbol ↕ used to draw the ray diagrams indicates
The refractive index of glass with respect to air is 2. The critical angle at their interface is
If A and B are the speed of light in a medium and refractive index of that medium respectively, then
When we sit at a camp fire, objects beyond the fire are seen swaying. The principle involved in it is
A rectangular tank of depth 2 m is full of water of refractive index \(\frac{4}{3 }\) When viewed from the top, the bottom of the tank is seen at a depth of 
The physical quantity which has no units, is
If i and r are the angles of incidence and refraction respectively, then i <r means the light ray travels from
The device used to measure the specific heat of a substance is
The heat energy supplied to a system during melting is known as
Formation of dew on the surface of a cold soft drink bottle kept in air is due to
Pick the correct match :
AWaterI483
BGlassII4180
CIronIII504
Which among the following behaves like heat store house for the earth?
1 cal =

A wire X of length 50 cm carrying a current of 2 A is placed parallel to a long wire Y of length 5 m. The wire Y carries a current of 3 A. The distance between two wires is 5 cm and currents flow in the same direction. The force acting on the wire Y is

A wire X of length 50 cm carrying a current of 2 A is placed parallel to a long wire Y of length 5 m

The refracting angle of prism is A and refractive index of material of prism is $\cot \frac{A}{2}$ The angle of minimum deviation is

Water falls from a 40 m high dam at the rate of \(9 \times 10^4\) kg per hour. Fifty percentage of gravitational potential energy can be converted into electrical energy. Using this hydroelectric energy number of 100 W lamps, that can be lit, is: (Take g=10ms-2)

The root mean square speed of smoke particles of mass \( 5 \times 10^{-17} \) kg in their Brownian motion in air at NTP is approximately. (Given \( k = 1.38 \times 10^{-23} \, {JK}^{-1} \))
A particle is moving with a velocity \( \vec{v} = K (y \hat{i} + x \hat{j} )\), where \( K \) is a constant. The general equation for its path is:

A thermodynamic system is taken from an original state D to an intermediate state E by the linear process shown in the figure. Its volume is then reduced to the original volume from E to F by an isobaric process. The total work done by the gas from D to E to F will be: