Guest

if an electron is not deflected in passing through a certain space,can we be sure that there is no magnetic feild in that region?

if an electron is not deflected in passing through a certain space,can we be sure that there is no magnetic feild in that region?

Grade:10

2 Answers

AKASH GOYAL AskiitiansExpert-IITD
420 Points
13 years ago

Dear Aditya

Deflection depends on VXB.So if v and b are in same direction then electron will go undeflected even if there is magnetic field(B).

All the best.

AKASH GOYAL

AskiitiansExpert-IITD

 

Please feel free to post as many doubts on our discussion forum as you can. We are all IITians and here to help you in your IIT JEE preparation.

Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar  respectively : Click here to download the toolbar..

 

vikas askiitian expert
509 Points
13 years ago

no we can not say that there is no magnetic feild....

take a example in which electron is passing through a region where, magnetic field and electric field exist ,both are perpendicular to each other as well as to velocity of particle...

 v is the velocity of moving electron then

force due to  electric field is Fe = Eq

 Force due to magnetic field is q(vBsin@) or qvB                      (sin90 =1)

  if electron is not deflected then total force acting must be zero

          qvB=qE

           v=E/B....1

that means if there is magnetic field then electron is not deviated but this condition 1 should be fulfilled....

 

Think You Can Provide A Better Answer ?

ASK QUESTION

Get your questions answered by the expert for free