QAIPMT-2010-Ph-1971: NEET 2010 Physics - Class 12 AIPMT-2010-Ph-1971 Solution: A particle having a mass of \(10^{-2}\) kg carries a charge of…

A particle having a mass of $10^{-2}$ kg carries a charge of $5\times10^{-8}$ C. The particle is given an initial horizontal velocity of $10^5\ \text{m s}^{-1}$ in the presence of electric field $\vec{E}$ and magnetic field $\vec{B}$. To keep the particle moving in a horizontal direction, it is necessary that (1) $\vec{B}$ should be perpendicular to the direction of velocity and $\vec{E}$ should be along the direction of velocity (2) Both $\vec{B}$ and $\vec{E}$ should be along the direction of velocity (3) Both $\vec{B}$ and $\vec{E}$ are mutually perpendicular and perpendicular to the direction of velocity. (4) $\vec{B}$ should be along the direction of velocity and $\vec{E}$ should be perpendicular to the direction of velocity. Which one of the following pairs of statements is possible?