List of top Questions asked in AMUEEE- 2004

A black body at $200\, K$ is found to exit maximum energy at a wavelength $14\, \mu\, m$ When its temperature is raised to $1000\, K$, then wavelength at which maximum energy emitted is

The capacity of a condenser is $4 \times 10^{-6} F$ and its potential is $100\, V$. The energy released on discharging it fully will be

The electric potential at the surface of an atomic nucleus $(Z=50)$ of radius $9.0 \times 10^{-13} cm$ is

The half-life of radium is $1620\, yr$ and its atomic weight is $226\, kg$ per kilomol. The number of atoms that will decay from its $1\, g$ sample per second will be (Avogadro's number $N=6.023 \times 10^{23}$ atoms/ $mol$ )

One milligram of matter converted into energy, will give

Deuteron and alpha particle in air are at separation $1\,?$ The magnitude of electric field intensity on $\alpha$-particle due to deuteron is

If $E_{1}$ be the electric field strength of a short dipole at a point on its axial line and $E_{2}$ that on the equatorial line at the same distance, then

$20 \,A$ current is flowing in a long straight wire. The intensity of magnetic field at a distance of $10\, cm$ from the wire, will be

An electron having charge $1.6 \times 10^{-19} C$ and mass $9 \times 10^{-31} kg$ is moving with $4 \times 10^{6} m / s$ speed in a magnetic field of $2 \times 10^{-1} T$ in a circular orbit. The force acting on an electron and the radius of circular orbit will be

In a simple microscope, if the final image is located at $25\, cm$ from the eye placed close to the lens, then the magnifying power is