Home
Class 12
PHYSICS
An electron enters a region where electr...

An electron enters a region where electrostatic field is `20N//C` and magnetic field is `5T`. If electron passes undeflected through the region, then velocity of electron will be

A

`0.25 ms^(-1)`

B

`2 ms^(-1)`

C

`4 ms^(-1)`

D

`8 ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
`v = (E)/(B) = (20)/(5) = 4m//s`
Promotional Banner

Similar Questions

Explore conceptually related problems

An electron enters a region where magnetic field (B) and electric field (E ) are mutually perpendicular, then

An electron beam with equivalent electric current I enters a region of crossed electric field and magnetic field B. Both the fields are uniform. It is found that the electron beam goes undeviated through the region of fields. After passing the field region, electrons hit a grounded target. How much force is exerted by the electron beam on urget? Assumem is the mass of electron and e its charge.

An electron is not deflected on passing through a certain region , because

An electron enters a region that contains a magnetic field directed into the page as shown. The velocity vector of the electron makes an angle of 30^(@) with the +y axis. What is the direction of the magnetic force on the electron when it enters the field ?

An electron entres a magnetic field whose direction is perpendicualr to the velocity of the electron. Then

Electrons taveling at a velocity of 2.4xx10^(6) ms^(-1) enter a region of crossed electric and magnetic fields as shoen in Fig. If the electric field is 3.0xx10^(6) Vm and the flux density of the magnetic field is 1.5 T, the electrons upon entering the region of the crossed fields will