Question:At one instant an electron(charge = -1.6 x 10-19
C)is moving in the xy plane ,...
Question
At one instant an electron(charge = -1.6 x 10-19
C)is moving in the xy plane ,...
At one instant an electron(charge = -1.6 x 10-19
C)is moving in the xy plane , the components of its velocity
beingvx = 3.0 x 105 m/s and
vy=4.0x105m/s. A magnetic field of 0.8T is in
the positivez direction. At that instant the magnitude of the
magnetic force onthe electron is ....
F = q(v X
B)=-1.6
x10-19(3.0
x105i +
4.0x105j) X 0.8
k
=-1.6 x 10-19 *3.0 x
105 *0.8(-j) +-1.6
x10-19
*4.0x105*0.8(-i)
= 3.84 x 10-14j + 5.12
x10-14i [ Sincei X
k = -j andj X
k = -i]
∴ |F| = √[( 3.84 x
10-14)2 +(5.12
x10-14)2] = 6.4 x10-14
N