When using the mathematical ratio method for determining the
order of each reactant in an experiment, how do you determine which
data pounts to use in the ratio?
Derive the formula for electron charge to mass
ratio
e/m=2V/(Br)^2: first, explain why formulas
(mv^2)/r=evB and
eV=1/2mv^2 must hold. Then, do what algebra is necessary
to show that those formulas imply formula
e/m=2V/(Br)^2
In the electron gun of a TV picture tube the electrons (charge
?e, mass m) are accelerated by a voltage
V. After leaving the electron gun, the electron beam
travels a distance D to the screen; in this region there
is a transverse magnetic field of magnitude B and no
electric field.
Find the approximate deflection of the beam due to this magnetic
field. (Hint: Place the origin at the center of the
electron beam
3.a) How to use the Thomson`s experiment to determine the
electron charge?
. b). Plan and describe the experiment based on the Hall effect
in order to determine the concentration of electrons in a metal
sample (use slide 19).
In detail, explain what role magnetism play in the 'Charge to
Mass ratio of an electron' experiment performed by J.J.
Thomson?
How can magnetism alter the expected results?
Why is it important for the electron beam to be perpendicular to
all non-negligible magnetic fields?
A proton (charge +e = 1.61x10-19 C and mass m =
1.67x10-27 kg), traveling perpendicular to a magnetic
field, experiences the same force as an alpha particle (charge +2e
and mass 4m) which is also traveling perpendicular to the same
field. The ratio of their speeds,
valpha/vproton, is:
A. 0.5
B. 1
C. 2
D. 4
E. 8