List of top Physics Questions

In the diagram shown below, $ m_1 $ and $ m_2 $ are the masses of two particles and $ x_1 $ and $ x_2 $ are their respective distances from the origin $ O $. The centre of mass of the system is
If the initial tension on a stretched string is doubled, then the ratio of the initial and final speeds of a transverse wave along the string is:
The dimensions [MLT-2A-2] belong to the:
A galvanometer having a resistance of $ 8 \, \Omega $ is shunted by a wire of resistance $ 2 \, \Omega $. If the total current is 1 A, the part of it passing through the shunt will be
A ball is projected horizontally with a velocity of $ 5 \, \text{m/s} $ from the top of a building 19.6 m high. How long will the ball take to hit the ground?
Let $ K_1 $ be the maximum kinetic energy of photoelectrons emitted by light of wavelength $ \lambda_1 $ and $ K_2 $ corresponding to wavelength $ \lambda_2 $. If $ \lambda_1 = 2\lambda_2 $, then
If $ \theta_1 $ and $ \theta_2 $ be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip $ \theta $ is given by
The sides of a parallelogram are represented by vectors $$ \vec{p} = 5\hat{i} - 4\hat{j} + 3\hat{k} \quad \text{and} \quad \vec{q} = 3\hat{i} + 2\hat{j} - \hat{k}. $$ Then, the area of the parallelogram is
A plane electromagnetic wave of frequency 20 MHz travels through a space along $ z $-direction. If the electric field vector at a certain point in space is 6 V/m, then what is the magnetic field vector at that point?
A car starts from rest and accelerates uniformly to a speed of 180 km/h in 10 s. The distance covered by the car in this time interval is
A fish in water (refractive index $ n $) looks at a bird vertically above in the air. If $ y $ is the height of the bird and $ z $ is the depth of the fish from the surface, then the distance of the bird as estimated by the fish is
When a certain metal surface is illuminated with light of frequency $ \nu $, the stopping potential for photoelectric current is $ V_0 $. When the same surface is illuminated by light of frequency $ \frac{\nu}{2} $, the stopping potential is $ \frac{V_0}{4} $. The threshold frequency for photoelectric emission is
A body is projected vertically upwards. The times corresponding to height $ h $ while ascending and while descending are $ t_1 $ and $ t_2 $, respectively. Then, the velocity of projection will be (take $ g $ as acceleration due to gravity)
An LED is constructed from a p-n junction diode using GaAsP. The energy gap is 1.9 eV. The wavelength of the light emitted will be equal to

Which logic gate is represented by the following combination of logic gates?

If $ C $ be the capacitance and $ V $ be the electric potential, then the dimensional formula of $ CV^2 $ is
The height vertically above the Earth's surface at which the acceleration due to gravity becomes 1 percent of its value at the surface is
In the case of an inductor,
In Young's double slit experiment, the ratio of maximum and minimum intensities in the fringe system is 9:1. The ratio of amplitudes of coherent sources is
The first emission of hydrogen atomic spectrum in Lyman series appears at a wavelength of

In the figure below, the capacitance of each capacitor is $ 3 \mu F $. The effective capacitance between A and B is

If 150 J of heat is added to a system and the work done by the system is 110 J, then the change in internal energy will be
The wavelength of the first line of Lyman series for H-atom is equal to that of the second line of Balmer series for a H-like ion. The atomic number $ Z $ of H-like ion is
In Young's double slit interference experiment, using two coherent waves of different amplitudes, the intensity ratio between bright and dark fringes is 3. Then, the value of the ratio of the amplitudes of the waves that arrive there is

In the series L-C-R circuit shown, the impedance is