List of top Physics Questions

If the initial velocity of a body is $V_1$ and final velocity is $V_2$ and the angle between $V_1$ and $V_1$ is $\phi$ then the change in velocity is.
If the half life of a radioactive substance is T, then its decay constant $\lambda$ is given by :
If the components of a force. are P along east and along north direction ,then the force is
If the binding energy per nucleon of deuterium is $1.115 \,MeV$, its mass defect in atomic mass unit is
If the atmospheric pressure is 76cm of Hg at what depth of water in a lake the pressure will become 2 atmospheres nearly.
If the Avogadro's number was to tend to infinity; the phenomenon of Brownian motion would:
If radius of earth shrinks by $1 %$ when mass remains same, the acceleration due to gravity on the surface of earth would
If $R$ and $H$ represent horizontal range and maximum height of the projectile, then the angle of projection with the horizontal is
If pressure of $CO_2$ (real gas) in a container is given by $p = \frac{RT}{2V - b} - \frac{9}{4b^2},$ then mass of the gas in container ts
If one mole of a monatomic gas $(\gamma = 5/3)$ is mixed with one mole of a diatomic gas $(\gamma = 7/3)$, the value of g for the mixture is
If momentum is increased by 20%, then kinetic energy increases by
If $\lambda_1 , \lambda_2 \, and \, \lambda_3$ are the wavelengths of the waves giving resonance with the fundamental, first and second overtones respectively of a closed organ pipe. Then the ratio of wavelengths $\lambda_1 : \lambda_2 : \lambda_3$ is
If in a plano-convex lens radius of curvature of convex surface is 10 cm and the focal length of the lens is 30 cm, the refractive index of the lens will be:
If $I_1,I_2,I_3$ be the ionising powers of $\alpha,\beta$ and $\gamma$ particles, the correct relation is
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 $ ?