- #1
Helly123
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- 20
Homework Statement
Homework Equations
f = q.v.B.sin tetha
I = q/t = v/R
The Attempt at a Solution
(1) q =a.b.n.v.t is it right?
(2) I = q/t = abnvt/t = abnv is it right?
(3)F = q.v.B is it right?
(4) ?
(5) ?
is it right?
Right so far.Helly123 said:(1) q =a.b.n.v.t is it right?
(2) I = q/t = abnvt/t = abnv is it right?
(3)F = q.v.B is it right?
A force is not an energy.Helly123 said:4) Volts = joules/Coulomb
Volts = F/q
I've looked at the link you gave me.mfb said:A force is not an energy.
Right.Helly123 said:distance found by right hand rule, F go trough width which is b.
It is useful to put brackets around denominators: n=q/(abvt). Otherwise you could misinterpret it as ##n=\frac q a bvt##.Helly123 said:n = q/abvt
Right.Helly123 said:n = IB/aV
why... you sure it's right?mfb said:Right.It is useful to put brackets around denominators: n=q/(abvt). Otherwise you could misinterpret it as ##n=\frac q a bvt##.Right.
Why do you think it is wrong?
I meant, the key answer is n = BI/aqV... but I don't think the key answer is wrong.mfb said:If you replace n by ##\frac 1 {A_H}##, it is the usual formula for the Hall effect. The Hall constant as inverse electron density takes into account that not all electrons contribute to current flow.
q in the problem statement is a charge. What you calculate here is a number.Helly123 said:(1) q =a.b.n.v.t is it right?
i still don't get it. What is n stands for? And n actually what? And my answer for 1 and 2 are they right?mfb said:Ah, n is the electrons per volume, not the charge density. Then you need the factor q in the answer (this also applies to question 2).
In that case your notation for q is a bit strange.q in the problem statement is a charge. What you calculate here is a number.
1 is right, 2 needs an additional factor q.Helly123 said:And my answer for 1 and 2 are they right?
Electrons move through an electric field, which can be created by a difference in electric potential or by an external electric force.
The movement of electrons creates a magnetic field, which interacts with other magnetic fields to produce a force.
The speed of electrons is determined by the strength of the electric field and the resistance of the material they are traveling through.
The velocity of electrons can be calculated using the equation v = E/B, where v is the velocity, E is the electric field strength, and B is the magnetic field strength.
No, the velocity of electrons can vary depending on the strength of the electric and magnetic fields they are in.