why will the charged particle move in a straight line when projected from rest in a region of steady and uniform elec and mag fields which are parallel to each other?
                   

3 years ago

Share

Answers : (2)

                                        

magnetic force on particle = qvBsin@


 


when velocity is parallel to magnetic then @ = 0 or 180,


then magnetic force is qvBsin0 = 0




electric force is F = qE


 


net force  =  electric force+ magnetic force = qE




net force is electric force along the direction of motion...so the motion of charged particle is straight line acclerated motion...

3 years ago
                                        

As the charge is at rest, it will accelerate by elctric field along the line of electric field ( magnetic field only change direction of charge).


Now as the magnectic field is parallal to electric field, so charge will move along magnetic field.


From the forluma, Fm=qvBsinθ as the θ=0 Fm=0, hence no net force magnetic force acting on it (and hence it will not change its direction)


From above result, as only eletric force acting on it, charge particle will move in a straight line (along the line of electric field due to eletric force)

3 years ago

Post Your Answer

More Questions On IIT JEE Entrance Exam

Ask Experts

Have any Question? Ask Experts
Post Question
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details
what are the rankings of iiser ? which iiser is better ? what kind of placements we get there ?
 
 
Rankings of IISER in the field of science comes just after IITs(Kanpur, Roorkee, KGP, Madras & Guwahati) and ISI Calcutta. Bhopal,Pune and MOhali are doing pretty good. Their main motive...
  img
Aziz Alam 16 days ago
Hey, I am from Bangalore, I am in a bad situation now, the problem is have just done my 10 std in 2010, and I quit school for good reasons. Now I have decieded to resume my sudies and do my...
 
 
For JEE 2014 the eligibility criteria for admission, in context of age was: Born on or after 1 st October 1989 . So for JEE 2015 you can have the idea about the exact date, i.e., Born on or...
  img
Aziz Alam 3 months ago
i am living in delhi and my parents are in maharashtra. can i make my local guardian in delhi to sign the declaration form on behalf of my parents???
 
 
hello dear student, Yes , your local gurdians can sign for you on behalf of your parents , as there is a option for gurdian or parnets sign, you can clafify with iit authorities further
  img
Sher Mohammad 3 months ago
Tell me where is the largest library in the world ?
 
 
The United States Library of Congress in Washington D.C. ranks as the largest library in the world. The British Library the world's other great library houses a collection comprising of 150...
 
Vijay Luxmi Askiitiansexpert 5 years ago
Sir, Got 160 in mains and 91% in cbse can I get NIT T CSE I belong to SC category and I have state quota? Also can I get IIST? Also mention the rank that I require to get IIST? Also predict...
 
 
The link below is IIT JEE Main Branch and College Predictor.You can use it to get the answer to your query. http://www.askiitians.com/iit-jee/main/college-branch-predictor.html This is...
  img
Aziz Alam 3 months ago
Which is the birth place of Hitler? In which year did Hitler become the Chancellor of Germany?
 
 
Adolf Hitler (20 April 1889 – 30 April 1945) was an Austrian-born German politician and the leader of the National Socialist German Workers Party (German: Nationalsozialistische...
 
Vijay Luxmi Askiitiansexpert 5 years ago
View all Questions »