Question

An electron, a proton and an alpha particle having the same kinetic energy are moving in circular orbits of radii re, rp, rα respectively in a uniform magnetic field B. The relation between re, rp, rα is :

re < rp = rα
re < rp < rα
re < rα < rp
re > rp = rα

Answer 1

Answer:

♠ The correct option is A.

Explanation:

Radius of circular path in magnetic field is given by

R = √(2Km)/qB

where

♦ K = kinetic energy of particle

♦ m = mass of particle

♦ q = charge on particle

♦ B = magnetic field intensity

♦ R = radius of path

R ∝ √m/q

As me < mp

 

re < rp

rα ∝ √(4mp)/ 2qp

rα ∝ √(mp) / qp

rα = rp

Answer 2

Answer:

HEY MATE,

HERE'S YOUR ANSWER IN THE ATTACHMENT.

The correct answer is option-(i)