List of top Physics Questions

Two metallic spheres $S_1$, and S$_2$ are made of the same material and have got identical surface finish. The mass of S$_1$ is thrice that of S$_2$. Both the spheres are heated to the same high temperature and placed in the same room having lower temperature but are thermally insulated from each other. The ratio of the initial rate of cooling of $S_1$ to that of S$_2$ is
Two point masses of 0.3 kg and 0.7 kg are fixed at the ends of a rod of length 1.4 m and of negligible mass. The rod is set rotating about an axis perpendicular to its length with a uniform angular speed. The point on the rod through which the axis should pass in order that the work required for rotation of the rod is minimum, is located at a distance of
A battery is connected between two points A and B on the circumference of a uniform conducting ring of radius r andresistance R. One of the arcs AB of the ring subtends an angle $\theta$ at the centre. The value of the magnetic induction at the centre due to the current in the ring is
The pairs of physical quantities that have the same dimensions is (are)
Which radiation in sunlight, causes heating effect?
The moment of inertia depends upon:
de Broglie hypothesis treated electron as:
Electric power is transmitted over long distances at high voltage because:
Which of the following pairs have the same dimensions?
The magnifying power of an astronomical telescope can be increased by:
The electron is accelerated through a potential difference of 10 V. The additional energy acquired by the electron is :
Which of the following has the least value in the common base amplifier?
A soap film held vertically is viewed in reflected sunlight. The observer would see a number of:
Weins displacement law is useful for finding:
Which of the following establishes the transverse nature of electromagnetic waves?
When the light passes from glass to air, there is no change in its:
An isosceles prism of angle $120^\circ$ has a refractive index 1.44. Two parallel rays of monochromatic light enter the prism parallel to each other in air as shown. The rays emerging from the opposite face
The orbital speed of jupiter, is
Ray optics is valid, when characteristic dimensions are
The blue colour of the sky is due to the phenomenon of
A wave of frequency 100 Hz travels along a string towards its fixed end. When this wave travels back, after reflection, a node is formed at a distance of 10 cm from the fixed end. The speed of the wave (incident and reflected) is
The displacement-time graph of a moving particle is shown below. The instantaneous velocity of the particle is negative at the point
The electric and magnetic field of an electromagnetic wave are
A position dependent force, F = (7 - 2x + 3x$^2$) N acts on a small body of mass 2 kg and displaces it from x = 0 to x = 5 m. The work done in joule is
A bar magnet is oscillating in the earth's magnetic field with a period $T$. What happens to its period and motion if its mass is quadrupled?