Question

A negative charges particle falling freely under gravity enters a region having uniform horizontal magnetic field pointing towards north. The particle will be deflected towards

• A. East
• B. West
• C. North
• D. South

Answer 1

Answer: (B)

Given that , $\overrightarrow{V}$ is pointing downwards and $\overrightarrow{B}$ is towards North

As magnetic force in given by,

$\overrightarrow{f}m=q(\overrightarrow{V}\times \overrightarrow{B})$

Using right hand thumb for negative charge we het the $\overrightarrow{F}$ is towards west