List of top Physics Questions

If the magnitude of the vector \(\vec{P} = x\hat{i} + 0.8\hat{j} + 0.6\hat{k}\) is 2, then the value of x is.
The value of the measurement \(14.0 \times 10^{-5} + 8.3 \times 10^{-3}\) with respect to significant figures is.

If the air-core medium is replaced by a dielectric of dielectric constant \(k\) in an air-core parallel plate capacitor of capacitance \(C\), its new capacitance becomes

A wire of length 0.5 m carrying current 4 A is placed perpendicular to a magnetic field of 0.2 T. The force exerted on the wire is

An AC circuit with \(R=2\pi^2\,\Omega\) and \(L=0.02\pi\) H powered with an a.c. source of frequency 50 Hz has an impedance of

Carnot engine operates between temperatures, 600 K and 300 K. If it absorbs 1200 J of heat from source, the work done by the engine is

Hydrostatic pressure at a depth of a liquid in a container depends on

The terminal velocity of a small steel ball of radius \(r\) falling in a fluid is proportional to

The angular speed of a geostationary satellite (in rad h\(^{-1}\)) is

The temperature at which the rms speed of oxygen molecules becomes equal to the rms speed of hydrogen molecules at 300 K is

If a bar magnet of magnetic moment \(M\) is cut into two equal parts perpendicular to its length then its new magnetic moment is

Electric flux through a closed surface depends on the

If a current of 2 A flows through a wire of length 1 m for 1 min, the charge flowing through it during this time is

If the length of a uniform metallic wire is halved and its radius is doubled, its resistivity is

If the binding energy per nucleon of a nucleus is 8.75 MeV and its mass number is 56, then total binding energy is

In a pure semiconductor at thermal equilibrium

Pick out the wrong statement about Bohr atom model

A screw gauge has a pitch of 0.1 mm and 100 divisions on its circular scale. When its both jaws touch, the fifth division of its circular scale coincides with zero. When a sphere is placed between the jaws, the reading of the linear scale is 5 mm and the 50th division of the circular scale coincides with zero of the main scale. Find the diameter of the sphere.
The time taken by a block of mass \(m\) to slide down from the highest point to the lowest point on a rough inclined plane is 50 % more compared to the time taken by the same block on identical inclined smooth plane. Both inclined planes are at 45° with the horizontal. The coefficient of kinetic friction between the rough inclined surface and block is ______.
A Carnot engine works between \(600\,\text{K}\) and \(300\,\text{K}\). Find its efficiency.

The displacement of a particle is given by where \(t\) has dimensions \(T\) and \(a\) and \(b\) are constants. The dimensions of \(b\) are:

If the stopping potential in a photoelectric experiment is measured to be 1.82 V, the maximum speed of the emitted electrons, in ms\(^{-1}\), is
(mass of the electron = \(9.1\times10^{-31}\) kg)}
Light of wavelength 500 nm falls on a single slit of width 0.1 mm. The angular position of the first minimum is}
An object is placed at 30 cm from a convex lens of focal length 20 cm. If the object is moved towards the lens by 5 cm, then the image is shifted by}
If an EM wave travels in a medium with \(\varepsilon_r = 4\), \(\mu_r = 1\), its speed (in ms\(^{-1}\)) in terms of \(c\) (\(c =\) velocity of light in free space) is}