List of practice Questions

A packet is dropped from a flight ascending with a velocity at height of 10 km. If the packet takes 100 s to reach the ground,^then the velocity of the flight is (Take = 10 ms$^{-2}$ )
Pick out the wrong statement
The alternating current in a circuit is given by $ I=50\,\sin \,314\,t $ . The peak value and frequency of the current are
The dimensional formula of electric potential is
The displacement, velocity and acceleration in a simple harmonic motion are related as the
The induced emf in a coil of $10$ Henry inductance in which current varies from $9\,A $ to $4\,A$ in $0.2$,second is
The power $(P)$ of an engine lifting a mass of $ 100\,kg$ up to a height of $ 10\,m $ in $ 1\,\min $ is
Which of the following is not the postulate of the kinetic theory of gases?
Which of the following is an ore of zinc?
Which of the following groups is ortho and para directing?
The transverse nature of electromagnetic waves is proved by which of the following?
The Brewster's law is given by the expression
The conservation of angular momentum demands that
The position vector of a point $R$ which divides the line joining $ P(6,\,3,-2) $ and $ Q(3,1,-4) $ Q(3,1, - 4) in the ratio $ 2:1 $ externally is
Two identical capacitors are first connected in series and then in parallel. The ratio of equivalent capacitance is
Select the molecule which has only one $ \pi - $ bond
The repeating unit present in Nylon $6$ is
The centripetal force is given by the expression
A long straight wire is carrying a current of $ 12\,A $. The magnetic field at a distance of $ 8\,cm$ is $ (\mu _{0}=4\pi \times 10^{-7}\,N/A^{2}) $
Which of the following physical quantity unit is not a fundamental unit?
The net electric force on a charge of $ +3\,\mu C $ at the mid-point on the line joining two charges of magnitude $ +2\,\mu C $ and $ -2\,\mu C $ separated by the distance of $6\,mm, $ is
Four small objects each of mass m are fixed at the corners of a rectangular wire-frame of negligible mass and of sides $a$ and $b (a > b)$. If the wire frame is now rotated about an axis passing along the side of length b, then the moment of inertia of the system for this axis of rotation is
Which one of the following is not a neurologically active drug?
Two bulbs 60 W and 100 W designed for voltage 220 V are connected in series across 220 V source. The net power dissipated is
Two fast moving particles X and Y are associated with de Broglie wavelengths 1 nm and 4 nm respectively. If mass of X is nine times the mass of Y, the ratio of kinetic energies of X and Y would be