List of top Physics Questions

The voltage of an A.C. source varies with time according to the equation $V=50\, \sin\,100\pi\,t\,\cos\,100\pi\,t$ . Where 't' is the sec and 'V' is in volts. Then
The voltage drop across a forward biased diode is 0.7 V. In the following circuit, the voltages across the $10\,\Omega$ resistance in series with the diode and $20\,\Omega$ resistance are
The vernier scale of a travelling microscope has $50$ divisions which coincide with $49$ main scale divisions. If each main scale division is $0.5\, mm$, then the least count of the microscope is
The velocity-time graph of a body is shown in figure. The displacement covered by the body in 8 s is
The velocity-time graph of a body moving in a straight line shown in the figure. The displacement and distance travelled by the body in 6 s are respectively
The velocity of centre of mass of the system remains constant, if the total external force acting on the system is
The velocity of light in air is $3 \times 10^8 \,m s^{-1}$ and that in water is $2.2 \times 10^8\, m s^{-1}$. The polarising angle of incidence is
The variation of density of a solid with temperature is given by the formula
The velocity head of a stream of water is 40 cm. Then, the velocity of flow of water is
The velocity-displacement graph of a particle is as shown in the figure. Which of the following graphs correctly represents the variation of acceleration with displacement ?
The value of universal gravitational constant $G=6.67 \times 10^{-11}\,N\,m^{2}\,kg^{-2}$. The value of $G$ in units of $g^{-1}\, cm^3\, s^{-2}$ is
The value of the magnetic field induction at the centre of the coil, if l = 2A, h= 10 cm. in the following figure is
The value of P so that the vectors $2 \hat i - \hat j + \hat k, \hat i + 2 \hat j - 3 \hat k$ and $3 \hat i + P \hat j + 5 \hat k$ are coplanar should be
The value of horizontal component of earths magnetic field at a place is $0.35\times10^{-4}$ tesla. If the angle of dip is $60^0$, the value of vertical component of earths magnetic field is about :
The value of g on earth's surface is $980\,cms^{-2}$. The value at a height of 64 km from surface of earth is
The value of angle of dip is zero at the magnetic equator because on it
The unit of the quantity g/G in SI will be
The unit of thermal conductance is
The unit of permittivity is same as that of
The unit of pole strength is :
The unit of potential energy is
The unit of inductance is equivalent to
The unit of electric dipole moment is
The unit of electric dipole moment is :
The two femurs each of cross-sectional area $10 \,cm^{2}$ support the upper part of a human body of mass $40\, kg$. The average pressure sustained by the femurs is $(Take\, g = 10\, m\, s^{-2})$