List of top Physics Questions

What is not true for equipotential surface for uniform electric field?
The maximum number of possible interference maxima for slit separation equal to twice the wavelength in Young's double-slit experiment, is
Pure silicon doped with phosphorus is a
Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show
Hydrogen bomb is based upon
A particle moves along a straight line $OX$. At a time $t$ (in second) the distance $x$ (in metre) of the particle from $O$ is given by $ x=40+12t-t^{3} $ How long would the particle travel before coming to rest?
When a charged particle moving with velocity $\vec{ v }$ is subjected to a magnetic field of induction $\vec{ B }$ the force on it is non-zero. This implies that
Interference was observed in an interference chamber when air was present. Now, the chamber is evacuated and if the same light is used, a careful observation will show
For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is
$300 \,J$ of work is done in sliding a $2\, kg$ block up an inclined plane of height $10 \,m$. Taking $ g=10\,\,m/{{s}^{2}}, $ work done against friction is
Which of the following circular rods, (given radius $r$ and length $l$ each made of the same material and whose ends are maintained at the same temperature will conduct most heat?
The time of reverberation of a room $A$ is one second. What will be the time (in seconds) of reverberation of a room, having all the dimensions double of those of room $A$?
In refraction, light waves are bent on passing from one medium to the second medium, because, in the second medium
Two similar circular loops carry equal currents in the same direction. On moving the coils further apart, the electric current will
The potential difference between $A$ and $B$ in the following figure is
Blue colour of sea water is due to
A string vibrates with a frequency of $200 \,Hz$. When its length is doubled and tension is altered, it begins to vibrate with a frequency of $300\, Hz$. The ratio of the new tension to the original tension is
A current of $5\,A$ is flowing at $220 \,V$ in the primary coil of a transformer. If the voltage produced in the secondary coil is $2200\, V$ and $50\%$ of power is lost, then the current in the secondary will be
A thin rod of length L and mass M is bent at its midpoint into two halves so that the angle between them is $90^\circ$. The moment of inertia of the bent rod about an axis passing through the bending point and perpendicular to the plane defined by the two halves of the rod is
A roller coaster is designed such that riders experience ''weightlessness'' as they go round the top of a hill whose radius of curvature is 20 m. The speed of the car at the top of the hill is between
A shell of mass 200 gm is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The initial velocity of the shell is
Dimensions of resistance in an electrical circuit, in terms of dimension of mass $M$, of length $L$, of time $T$ and of current $I$, would be
A small coin is resting on the bottom of a beaker filled with liquid. A ray of light from the coin travels upto the surface of the liquid and moves along its surface. How fast is the light travelling in the liquid?
A mass of $2.0\, kg$ is put on a flat pan attached to a vertical spring fixed on the ground as shown in the figure. The mass of the spring and the pan is negligible. When pressed slightly and released the mass executes a simple harmonic motion . The spring constant is $200\, N/m$ . What should be the minimum amplitude of the motion so that the mass gets detached from the pan (take $g = 10 \,m /s^2 $).
The total power dissipated in watt in the circuit shown here is