Home
Class 12
PHYSICS
An electron is moving along positive x-a...

An electron is moving along positive x-axis `A` unifrom electric filed exists to wards negative y-axis. What should be the direaction of magnetic field of suitable magnitude so that net force of electrons is zero .

A

positivez-axis

B

negative z-axis

C

positivey-axis

D

negative y-axis

Text Solution

Verified by Experts

The correct Answer is:
B
`oversetrarr(F_(e)) + oversetrarr(F_(m)) = 0 `
`qoversetrarrE + q (oversetrarrV xx oversetrarrB) =0 implies oversetrarr(E) + oversetrarrV xx oversetrarrB =0`
`E (-hatj) + VB (hati xx hatn) =0 implies hati xx hatn`
should be in `hatj . So hatn = - hatk` .
Promotional Banner

Similar Questions

Explore conceptually related problems

An electrons is moving along +ve x -axis in the presence of uniform magnetic field along +ve y -axis. What is the direction of the force acting on it?

An electron beam projected along + X-axis, experience a force due to a magnetic field along the + Y-axis. What is the direction of the magnetic field?

An electron is moving towards x-axis. An electric field is along y-direction then path of electron is

An electron is moving with constant velocity along x-axis. If a uniform electric field is applied along y-axis, then its path in the x-y plane will be

An electron is projected along positive z-axis, magnetic field is present along y-axis then direction of initial acceleration of the particle is

An electron beam projected along positive x-axis deflects along the positive y-axis. If this deflection is caused by a magnetic field, what is the direction of the field?