List of top Physics Questions

Pressure inside two soap bubbles are 1.01 and 1.02 atmosphere, respectively. The ratio of their volumes is:

The potential of a large liquid drop when eight liquid drops are combined is 20 V. Then, the potential of each single drop was:

The range of a projectile projected at an angle of $ 15^\circ $ with the horizontal is $ 50 $ m. If the projectile is projected with the same velocity at an angle of $ 45^\circ $, then its range will be:

A uniform rod AB of length 1 m and mass 4 kg is sliding along two mutually perpendicular frictionless walls OX and OY. The velocity of the two ends of the rod A and Bare 3 m/s and 4 m/s respectively, as shown in the figure. Then which of the following statement(s) is/are correct?

The shortest wavelengths emitted in the hydrogen spectrum corresponding to different spectral series are:
(A) Pfund series
(B) Balmer series
(C) Brackett series
(D) Lyman series.
The wavelengths arranged correctly in decreasing order are_______.
Fill in the blank with the correct answer from the options given below.

In a meter bridge experiment, a resistance of $ 10 \, \Omega $ is balanced by a resistance $ X $ with a balance point at $ 40 \, \mathrm{cm} $. What is the value of $ X $?

In the above diagram, a strong bar magnet is moving towards solenoid-2 from solenoid-1. The direction of induced current in solenoid-1 and that in solenoid-2, respectively, are through the directions :

Find the value of m if $M = 10$ $kg$. All the surfaces are rough.

Two infinitely long straight parallel conductors carrying currents $I_1$ and $I_2$ are held at a distance d apart in vacuum. The force F on a length L of one of the conductors due to the other is _______.
Fill in the blank with the correct answer from the options given below

The equivalent capacitance of a combination of connected capacitors shown in the figure between the points P and N is:

When unpolarized light is incident at an angle of 60° on a transparent medium from air, the reflected ray is completely polarized. The angle of refraction in the medium is:

The magnetic force acting on a charged particle carrying a charge $3 \mu C$ in a magnetic field of $5$ T acting in the $y$-direction, when the particle velocity is \[ (\hat{i} + \hat{j}) \times 10^5 { ms}^{-1} \] is

The photoelectric work function for a photosensitive material is 5.2 eV. The energy of the incident radiation for which the stopping potential is 6 V is

The correct order of arrangement of electromagnetic waves according to their wavelengths is

An alternating current having peak value 14.14 A is used to heat a metal wire. The value of the direct current $i$ required to produce the same heating effect in the same wire is

The velocity of a travelling plane wave given by \[ y = 10^{-2} \sin \left( 200t - \frac{x}{5} \right) m, \] is

For a paramagnetic material, the magnetic susceptibility $ \chi_m $ is

The energy stored in a soap bubble of diameter 4 cm is nearly (surface tension of soap solution is 0.07 N/m)

A particular color of light has a wavelength of 663 nm. What is the energy possessed by the light?
(Planck’s constant $h = 6.63 \times 10^{-34}$ J·s; Velocity of light $c = 3 \times 10^8$ m/s)

When the hydrogen atom is excited from the ground state,

The magnetic moment $\mu$ associated with a charged particle carrying charge $q$ moving in a circle of radius $a$ with uniform speed $v$ is

Two perfectly black bodies are at temperatures $ T $ and $ 2T $. The ratio between the wavelengths corresponding to maximum energy emission by the two black bodies is

A particle is describing a uniform circular motion with a certain constant speed. The INCORRECT statement is

When two different liquids of same mass but at two different temperatures $27^\circ C$ and $47^\circ C$ are mixed together, the resulting temperature of the mixture is $35^\circ C$. The ratio of their specific heat capacities is

In a p-n junction diode, reverse biasing