List of top Physics Questions

If g on the surface of the earth is $9.8m/s^2,$ its value at a height of 6400 km is (Radius of the earth = 6400km).

If error in measuring diameter of a circle is $4\ %$, the error in circumference of the circle would be

If each diode in figure has a forward bias resistance of $25\,\Omega$ and infinite resistance in reverse bias, The values of the current

If $E$ is the energy of $n^{th}$ orbit of hydrogen atom the energy of $n^{th}$ orbit of $He$ atom will be

If displacement of a particle is zero, distance covered by it

If C denotes the velocity of light, velocity of cathode rays is

If both the length and radius of the wire are doubled, how does the modulus of elasticity change ?

If air is blow n with a straw under of the pans of a physical balance present in equilibrium position, then that pan.

If a vector $\vec{A}$ makes an angles $\alpha$, $\beta$ and $\gamma$ respectively with the $x$, $y$ and $z$ axes respectively. Then $sin^{2}\alpha+sin^{2}\beta+sin^{2}\gamma$ is equal to

If a variable frequency ac source is connected to a capacitor then with decrease in frequency the displacement current will

If a thermometer reads freezing point of water as $ 20{}^\circ C $ and boiling point as $ 150{}^\circ C $ , how much thermometer read, when the actual temperature is $ 60{}^\circ C $ ?

If a solid has a sharp melting point, then it means that the solid is :

If a particle moves in a circle describing equal angles in equal intervals of times, the velocity vector

If a man goes $10 \,m$ toward north and $20\, m$ toward east, then his displacement is

If a gas has f - degrees of freedom, the ratio $C_p/C_v$ of the gas is

If a force of 250 N act on a body, the momentum acquired is $125\,kg\,m\,s^{-1}$, what is the period for which force acts on the body ?

If a conical wire is stretched by two forces F applied, parallel to its length and In opposite direction. NoramI to end faces. The length of wire is L and its end radius are $r_1$ and $r_2$ Find out the extention produced (Given: Y=Young's modulus of wire)

If a car covers $2/5^{th}$ of the total distance with $v_1$ speed and $3/5^{th}$ distance with $v_2$ then average speed is

If a ball of $80\, kg$ mass hits an ice cube and temperature of ball is $100\,^{\circ}C$, then how much ice converted into water ? (Specific heat of ball is $0.2 \,cal \,g^{-1}$, Latent heat of ice $= 80\, cal \,g^{-1}$)

If a ball is thrown vertically upwards with a velocity of 40 m/s, then velocity of the ball after two seconds will be $(g = 10 \, m/s^2)$

If $13.6 \,eV$ energy is required to separate a hydrogen atom into a proton and an electron, then the orbital radius of electron in a hydrogen atom is

Identify the correct statement from the following:

Iceberg floats in sea water with a part of it submerged. The percentage fraction of the ice berg submerged is (Density of ice $= 0.9 \,g \,cm^{-3}$, density of sea water $= 1.1 g cm^{-3}$)

How will the diffraction pattern of single slit change when yellow light is replaced by blue light ? The fringes will be:

How much work can be obtained from 100 calories of heat energy ?