question_answer

Arrange the following particles in increasing order of values of e/m ratio : electron (e), proton (p), neutron (n) and \[\alpha -\]particle \[(\alpha )\]

A) \[n,\,p,\,e,\,\alpha \]

B) \[n,\,\alpha ,\,p,\,e\]

C) \[n,\,p,\,\alpha ,\,e\]

D) \[e,\,p,\,n,\,\alpha \]

Correct Answer: B

Solution :

[b] 

	Electron	Proton	Neutron	particle
e	1 unit	1 unit	Zero	2 units
m	1/1837 unit	1 unit	1 unit	4- units
e/m	1837	1	Zero	2