Physics Test - ...

A smooth sphere is moving on horizontal surface with a velocity vector $\left(2\widehat{\text{i}}+2\widehat{\text{j}}\right)$m/s immediately before it hits a vertical wall. The wall is parallel to vectorand coefficient of restitution between the sphere (in m/s) and the wall is e = 1/2. The velocity of the sphere after it hits the wall is -

If \(n_{R}\) and \(n_{V}\) denote the number of photons emitted by a red bulb and violet bulb of equal power in a given time, then

A lead bullet strikes at target with a velocity of \(480 \mathrm{m} \mathrm{s}^{-1}\). If the bullet falls dead, the rise in temperature of bullet \((c\) \(\left.=0.03 \mathrm{cal} / \mathrm{g} /^{\circ} \mathrm{C}\right),\) assuming that heat produced is equally shared between the bullet and target is

Which logic gate is represented by the following logic gates?

In a medium, the force of attraction between two point charges, which are at distance \(d\) apart, is \(F\). What distance apart should

these point charges be kept in the same medium, so that the force between them becomes \(16 F ?\)

If the forward voltage in a diode is increased, the width of the depletion region :

A nucleus is bombarded with a high speed neutron so that resulting nucleus is a radioactive one. This phenomenon is called

Typical silt(hard mud) particle of radius $\mathrm{20 }\mathrm{\mu }\mathrm{m}$ is on the top of lake water, its density is $2000 \mathrm{k}\mathrm{g}\mathrm{ }{\mathrm{m}}^{-3}$ and the viscosity of lake water is 1.0 mPa, density is $1000 \mathrm{k}\mathrm{g}\mathrm{ }{\mathrm{m}}^{-3}$. If the lake is still(has no internal fluid motion). The terminal speed with which the particle hits the bottom of the lake is .......... ${\mathrm{m}\mathrm{m }\mathrm{s}}^{-1}$

In an AC circuit the instantaneous values of emf and current are \(e=200 \sin 300 t\) volt and \(i=2 \sin \left(300 t+\frac{\pi}{3}\right)\) amp. The average power consumed in watt is

A galvanometer of resistance $5\mathrm{0 }\mathrm{\Omega }$ is converted into ammeter by connecting a low resistance (shunt) of value $\mathrm{1 }\mathrm{\Omega }$ in parallel to the galvanometer S. If full scale deflection current of galvanometer is 10 mA, then the maximum current to be measured by the ammeter is