Physics Test - ...

In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, u = speed of the particle, $\alpha =$ angular acceleration)

Under the influence of a uniform magnetic field a charged particle is moving in a circle of radius R with constant speed v. The time period of the motion

The frequency of oscillation of current in the inductor is-

In Rutherford scattering experiment, what will be the correct angle for $\alpha$ scattering for an impact parameter b=0?

The current I in the given circuit is

In a series combination of R, L and C to an AC source at resonance, if R = 20 ohm, then impedance Z of the combination is

Three capacitors of capacitance $1.0 \mathrm{\mu F}, 2.0 \mathrm{\mu F}$ and $5.0 \mathrm{\mu F}$ are connected in series to a $10\mathrm{V}$ source. The potential difference across the $2.0\mathrm{ \mu F}$ capacitor is

What is the refractive index of material of a plano-convex lens, if the radius of curvature of the convex surface is $5\mathrm{ cm}$ and focal length of the lens is $20\mathrm{ cm}$.

In an energy recycling process, \(\mathrm{X} \mathrm{g}\) of steam at \(100^{\circ} \mathrm{C}\) becomes water at \(100^{\circ} \mathrm{C}\) which converts \(\mathrm{Y}\) g of ice at \(0^{\circ} \mathrm{C}\) into water at \(100^{\circ} \mathrm{C}\). The ratio of \(\frac{\mathrm{X}}{\mathrm{Y}}\) will be (Specific heat of water \(=4200 \mathrm{J} / \mathrm{kg} \mathrm{K}\), Specific latent heat of fusion \(=3.36 \times 10^{5} \mathrm{J} / \mathrm{kg},\) Specific latent heat of vaporization \(=22.68 \times 10^{5} \mathrm{J} / \mathrm{kg}\)

The cofficient of linear expansion for a certain metal varies with temperature as \(\alpha(\mathrm{T})\). If \(L_{0}\) is the initial length of the metal and the temperature of metal is changed from \(\mathrm{T}_{0}\) to \(\mathrm{T}\left(\mathrm{T}>\mathrm{T}_{0}\right)\) then