Electronics - Voltage and Current - Discussion


Which is the smallest?

[A]. atom
[B]. proton
[C]. neutron
[D]. electron

Answer: Option D


No answer description available for this question.

Sandeep said: (Dec 24, 2010)  
mass of proton & neutron = 1.678*10^-27.
while that of electron is = 9.1*10^-31.

Kulwinder said: (May 5, 2011)  
I agree with sandeep.

Mukesh said: (Dec 6, 2011)  
@sandip:but mass of electon is 1.6*10^-19

Ranjitha said: (Dec 21, 2011)  
@Mukesh:charge of electron=1.6*10^-19

Jaggu said: (Jan 7, 2012)  
I agree with sandeep.

Amuthan said: (Jun 2, 2012)  
Hello guys question is on radius not mass or charge. :).

Satwant Singh said: (Jun 21, 2012)  
Which is the largest ?

Praveen said: (Sep 18, 2012)  
You are right Amuthan. The question is about its radius not the mass or charge.

Radius of Neutron: 1.113284057367 x10^-15 m
Radius of proton : 1.112772961016 x10^-15 m
Radius of electron: 9.087345835484 x10^-17 m

So, electron is the smallest.

Mrunali said: (Jan 7, 2014)  
Just FYI.

Mass of an electron is 9.1*10^-31 kg.

Mass of a proton is 1.6*10^-27 kg.

Charge of an electron is -1.6*10^-19 C.

Charge of a proton is 1.6*10^-19 C.

Sakthi Vel.S said: (Aug 8, 2014)  
Proton & neutron joint, so it was big size.

But electron is separate.

Xylene said: (Jul 2, 2016)  
How did you measure the radius of electrons?

What I know is that electrons are waves.

Jay said: (Aug 30, 2016)  
@Xylene : How can you say that?

Mahesh said: (Jul 12, 2017)  
How did you calculate the radius of e & p & n?

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