AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

An electron initially at rest at point O (lying on the cathode) is acted upon by a magnetic field $\vec{B} = B_{0} \hat{k}$ and electric field $\vec{E} = E_{0} \hat{i}$ . This electric field results due to the potential difference V between the cathode and anode separated by a distance d as shown in figure. Dimension of anode & cathode plates are very large compared to ‘d’.
(q = magnitude of charge of electron)

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

The electron will not reach the anode if $B_{0} > \sqrt{\frac{2 m E_{0}}{q d}}$

The electron will not reach the anode if $B_{0} < \sqrt{\frac{2 m E_{0}}{q d}}$

The electron will just reach the anode in time $t = \frac{π m}{q B_{0}}$ , if it is just able to reach anode

The electron will just reach the anode in time $t = \sqrt{\frac{2 m d}{q E}}$ , if it is just able to reach anode

answer is A, C.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

$ω = \frac{q B}{m}$
The electron will not reach the anode only when it turns by $π$ by the time it comes near anode. Let time taken be t.
$θ = ω t$
$π = \frac{q B}{m} t \Rightarrow t = \frac{m π}{q B}$

Watch 3-min video & get full concept clarity

courses

No courses found

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!