question_answer

A particle having the same charge as of electron moves in a circular path of radius 0.5 cm under the influence of a magnetic field of 0.5 T. If an electric field of 100 V/m makes it to move in a straight path, then the mass of the particle is (Given charge of electron \[=1.6\,\times \,{{10}^{-19}}C\]) [JEE Main 09-Jan-2019 Evening]

A)       \[1.6\times {{10}^{-19}}kg\]

B) \[1.6\times {{10}^{-27}}\text{ }kg\]

C) \[9.1\times {{10}^{-}}^{31}kg\]

D) \[2.0\times {{10}^{-}}^{24}kg\]

Correct Answer: D

Solution :

[d]