List of top Physics Questions

The velocity of a particle in S.H.M. at displacement y from mean position is ( $ a= $ amplitude $ \omega = $ angular frequency)
$n$ identical spherical drops each of radius $r$ are charged to same potential $V$. They combine to form a bigger drop. The potential of the big drop will be :
An electric dipole placed in a nonuniform electric field experiences
A capillary tube of radius $r$ can support a liquid of weight $6.28 \times 10^{-4} \,N$. If the surface tension of the liquid is $5 \times 10^{-2} \,N / m$. The radius of capillary must be
A charge $q$ is placed at the centre of line joining two equal point charges each equal to $+Q$. The system of $3$ charges will be in equilibrium if $q$ is equal to
In the circuit shown, the effective capacitance between A and B is
Magnetic permeability is maximum for:
A frog can be levitated in a magnetic field produced by a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behaves as
Magnetic permeability is maximum for
Curie temperature is the temperature above which
A body of mass $1\, kg$ is rotating in a vertical circle of radius $1\, m$. What will be the difference in kinetic energy at the top and at the bottom of the circle? $\left(\right.$ take $\left.g=10\, m / s ^{2}\right)$
The angle through which a cyclist bends when he covers a circular path of $34.3 \,m$ circumference in $\sqrt{22} \sec$ is $\left(g=9.8 \,m / s ^{2}\right)$
An object is thrown along a direction making an angle $45^{\circ}$ with the horizontal direction. The horizontal range of the object is equal to :
The escape velocity for a body projected vertically upwards from the surface of earth is $11\, km/s$. If the body is projected at an angle of $45^\circ$ with the vertical, the escape velocity will be
Four molecules of a gas have speeds $1,2,3$ and $4\, kms ^{-1}$. The value of rms speed of the gas molecules is :
Three vectors satisfy the relation $\overrightarrow{A}.\overrightarrow{B}=0$ and $\overrightarrow{A}.\overrightarrow{C}=0$ then $\overrightarrow{A}$ is parallel to
The time taken by AC of 50 Hz in reacting from zero to the maximum value is
The aperture of objective lens of a telescope is made large so as to
A steel wire $0.5\, m$ long has a total mass $kg$ and stretched with a tension of $800\, N$. The frequency with which it vibrates in its fundamental note will be :
A girl is swinging on a swinging plate form in sitting position when the girl stands up then the period of swinging?
An automobile in travelling at 50 km/h, can be stopped at a distance of 40 m by applying brakes. If the same automobile is travelling at 90 km/h, all other conditions remaining same and assuming no skidding, the minimum stopping distance in metres is:
A man of weight $80\, kg$ is standing in an elevator which is moving with an acceleration of $ 6\,m/{{s}^{2}} $ in upward direction. The apparent weight of the man will be $ (g=10\,\,m/{{s}^{2}}) $ :
The magnetic lines of force inside a bar magnet
Three forces start acting simultaneously on a particle moving with velocity $\vec{v}$ . These forces are represented in magnitude and direction by the three sides of a triangle ABC(as shown). The particle will now move with velocity
The value of amu is which of the following?