List of top Physics Questions

The figure shows elliptical orbit of a planet m about the sun S. The shaded area SCD is twice the shaded area SAB. If t1 is the time for the planet to move from C to D and t2 is the time to move from A to B then :
elliptical orbit of a planet m about the sun S
The first line of Balmer series has wavelength 6563 Å. What will be the wavelength of the first member of Lyman series
The primary of a transformer has 400 turns while the secondary has 2000 turns. If the power output from the secondary at 1000 V is 12 kW, what is the primary voltage ?
The moment of inertia of a disc of mass M and radius R about an axis, which is tangential to the circumference of the disc and parallel to its diameter, is
A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If radius were halved and the temperature doubled, the power radiated in watt would be :
Escape velocity when a body of mass m is thrown vertically from the surface of the earth is v, what will be the escape velocity of another body of mass 4m is thrown vertically
A metallic bar is heated from 0 °C to 100 °C. The coefficient of linear expansion is 10-5K-1. What will be the percentage increase in length ?
Resonance frequency of LCR series a.c. circuit is f0. Now the capacitance is made 4 times, then the new resonance frequency will become.
If \(\vec{E}\) and \(\vec{B}\) represent electric and magnetic field vectors of the electromagnetic waves, then the direction of propagation of the waves will be along
A graph is plotted with PV/T on y-axis and mass of the along x-axis for different gases. The graph is
A Cylinder rolls down an inclined plane of inclination 30°, the acceleration of cylinder is
A gymnst takes turns with her arms & legs stretched. When she pulls her arms & legs in
For nuclear reaction, select correct statement for released energy
If minimum deviation = 30° then speed of light in prism
Triangle with angle 60
What is the ratio of speed of wave in medium 1 and 2 ?
Wave length
Density of sea water is more than that of fresh water then for a boat floating. What will be true
1000 N force is required to lift a hook and 10000 N force is requires to lift a load slowly. Find power required to lift hook with load with speed v = 0.5 m/sec
A spring of spring constant k is cut into 3 equal part find k of each
If speed of sound in air is 340 m/s and in water 1480 m/s. If frequency of sound is 1000 kHz then find wavelength in water.
Loudness of sound defines on
A mass of 200 gm has initial velocity \(v_i = 2\hat{i}+3\hat{j}\) and final velocity \(v_f=-2\hat{i}-3\hat{j}\) find magnitude of change in momentum
A positive charge particle is released in electric field in case (a) it is just released and in case (b) it has initial speed v0 along electric field. If after sometime its kinetic energy in case (a) and (b) are k1 and k2 then,
A nuclear of mass number A emits a particle speed of a particle is v then what is recoil speed of nuclease.
Fermer bone has base n average cross section area 100 cm2 supporting mass of 40 kg of man find average pressure
Two wave in string have same velocity. If linear mass density of string are μ1 = 5, μ2 = 20 T1 = 40 then , T2 = ?