# A Particle of Mass M and Charge Q is Released from the Origin in a Region in Which the Electric Field and Magnetic Field Are Given by - Physics

Sum

A particle of mass m and charge q is released from the origin in a region in which the electric field and magnetic field are given by
vecB = -B_0 vecj and vecE = E_0 vecK
Find the speed of the particle as a function of its z-coordinate.

#### Solution

Given:
Mass of the particle = m
Charge of the particle = q
Electric field and magnetic field are given by
vecB = -B_0 vecj and vecE = E_0 vecK
Velocity, v = v_xhati + vyhatj + v_zhatk
So, total force on the particle,
F = q (E + v × B)
= q [E_0hatk - (v_xhati + vyhatj + vzBoi)
= v_x = 0,
so, a_z =(qE_0)/m
v^2 = u^2 + 2as = 2(qe_0)/m z

Here, is the distance along the z-direction.

Concept: Force on a Moving Charge in Uniform Magnetic and Electric Fields
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#### APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 12 Magnetic Field
Q 51 | Page 234
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