List of top Physics Questions

The magnetic needle of a tangent galvanometer is deflected at an angle $30^{\circ}$ due to a magnet. The horizontal component of earth's magnetic field $0.34$ $\times 10^{-4} T$ is along the plane of the coil. The magnetic intensity is
The coefficient of mutual inductance, when magnetic flux changes by $2 \times 10^{-2} Wb$ and current changes by $0.01 A$ is
The breaking stress of a wire depends upon
A second pendulum is kept in a satellite it is revolving around the earth at the height of $3\,R$ from the earth surface. Time period of second pendulum will be:
The orbital speed of a satellite revolving nearby the earth is:
Air cored choke coil and delectric bulb are connected in series with $A.C$. mains. A soft iron rod is inserted in coil then the intensity of electric bulb will be :
Dynamo which produces electricity, is a application of:
Sometimes positive charged particle comes from space towards earth with high velocity. Its deviation due to the magnetic field of earth will be:
Which of the following is proportional to energy density m magnetic field $B$:
Which one of the following is ferro magnetic?
Scent sprayer is based on
Kepler's second law is based on
Identify the pair whose dimensions are equal:
Golden view of sea shell is due to
Cooking gas containers are kept in a lorry moving with uniform speed. The temperature of the gas molecules inside will:
At what temperature is the rms velocity of a hydrogen molecule equal to that of an oxygen molecule at $47^\circ$C ?
At the uppermost point of a projectile, its velocity and acceleration are at an angle of
Woolen clothes keep the body warm in winter. Air is a bad conductor of heat.
Stress is the internal force per unit area of a body. Rubber is more elastic than steel.
S.I. units are logical and coherent. S.I. system of units is a rationalised system.
In an elastic collision of two billiard balls, the total kinetic energy is conserved during the short time of oscillation of the balls (i.e. when they are in contact). Energy spent against friction does not follow the law of conservation of energy.
An astronomical telescope has a large aperture to :
According to Wein's displacement law
Which one of the following spherical lenses does not exhibit dispersion? The radii of curvature of the surfaces of the lenses are as given in the diagrams
In a PN junction :-