List of top Physics Questions

A certain amount of heat energy is supplied to a monoatomic ideal gas which expands at constant pressure. What fraction of the heat energy is converted into work ?
In an adiabatic expansion of an ideal gas the product of pressure and volume
A sphere, a cube and a thin circular plate all of same material and same mass initially heated to same high temperature are allowed to cool down under similar conditions. Then the
Iceberg floats in water with part of it submerged. What is the fraction of the volume of iceberg submerged if the density of ice is $\rho_i = 0.917 \,g\,cm^{-3}$ ?
A wheel starting from rest gains an angular velocity of $10$ rad/s after uniformly accelerated for $5$ sec. The total angle through which it has turned is
Young's modulus of a perfect rigid body is
The value of acceleration due to gravity at a height of $10\,km$ from the surface of earth is $x$. At what depth inside the earth is the value of the acceleration due to gravity has the same value $x$?
A double concave lens of refractive index 1.5 with its two spherical surfaces of radii R1 = 30 cm and R2 = 45 cm is kept in air. Its focal length is
A convex lens has a focal length of 10 cm. If u is the object distance, then the image distance is given by
The angle between the paraxial rays and principal axis is
A bird is flying vertically downwards the surface of water of a lake with constant speed. For a fish inside the water exactly below the bird, the bird appears to be
To examine the internal organs of a human body through light, the doctors use
A rectangular tank of depth 4 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 total internal reflection in diamond makes it shine, because the critical angle of diamond is
Ghee is converted from liquid to solid state during winter season. This process is called
40 g of water at 60°C is added to. 60g of water at 30°C. The final temperature of their mixture is
Humidity means
Which among the following pair of units measure the temperature?
A bar magnet is moved towards a coil (a) slowly, (b) quickly. The induced EMF is
The magnetic field lines due to the horseshoe magnet between its poles are
A conductor moving with a speed of 20 m/s in the direction perpendicular to the direction of magnetic field of induction 0.5 T, induces an EMF of 5 V. The length of the conductor is
The material more suitable for core of the electromagnet is
An auto driver has started his auto with the help of a rope by pulling. The device used by him to convert mechanical energy to electrical energy is
The magnetic force acting on a moving charge is given by the product of three quantities, namely
Two currents 0.5 mA and 5 mA flow towards the junction in a circuit and three currents 1 mA, x and 2 mA flow away from the junction. The value of x (in mA) is