An electron gun T emits electron accelerated by a potential difference U in a vacuum in the direction of the line a as shown in figure. Target M is placed at a distance d as shown in figure. Find the magnetic field perpendicular to the plane determine by line a and the point M in order that electron hit the target M –
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
BeV = 
… (1)
Also, r = 
… (2)
Kinetic energy of electron 
= eU…(3)
From (1), (2), (3)
B = 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
A vertical straight conductor carries a current vertically upwards. A point P lies to the east of i…
If a copper rod carries a direct current, the magnetic field associated with the current will be
A charge q coulomb moves in a circle at n revolutions per second and the radius of the circle is r …
An infinitely long straight conductor is bent into the shape as shown in the figure. It carries a c…
A current i ampere flows in a circular arc of wire whose radius is R, which subtend an angle 3π/2 r…
A current i ampere flows along the inner conductor of a coaxial cable and returns along the outer c…