AIPMT 2011 Preliminary Mock Test

A current carrying closed loop in the form of a right angle isosceles triangle $ABC$ is placed in a uniform magnetic field acting along $AB$. If the magnetic force on the arm $BC$ is $\vec{F}$, the force on the arm $AC$ is:

The power obtained in a reactor using ${\text{U}}^{235}$ disintegration is $1000\text{kW}$. The mass decay of ${\text{U}}^{235}$ per hour is:

There are four light-weight-rod samples, $A,B,C,D$ separately suspended by threads. A bar magnet is slowly brought near each sample and the following observations are noted: (i) $A$ is feebly repelled (ii) $B$ is feebly attracted (iii) $C$ is strongly attracted (iv) $D$ remains unaffected. Which one of the following is true?

The electric and the magnetic field, associated with an e.m. wave, propagating along the $+z$ -axis, can be represented by:

A uniform electric field and a uniform magnetic field are acting along the same direction in certain region. If an electron is projected in the region such that its velocity is pointed along direction of fields, then the electron: