What Velocity Is Needed to Generate a 1 μA Current in a Magnetic Field?

lovinuz
Messages
4
Reaction score
0

Homework Statement


Two parallel conducting rails are separated by 50 cm. These are connected together
by a fixed wire and by a third rail, constrained to lie transverse to the two parallel rails,
which can slide back and forth. There is a 100 ohm resistance in the fixed wire. All three rails lie in the xy-plane, in the presence of a magnetic field B = 10 μT k(direction vector). What velocity must one slide the rail in order to generate a current of 1 μA?


Homework Equations


V=IR
F=q(E+vxB)


The Attempt at a Solution


A current of 1 μA and resistance of 100 ohm means that the voltage should be 1x10-3 V. What should I do next?
 
Physics news on Phys.org
A current of 1 μA and resistance of 100 ohm means that the voltage should be 1x10-3 V
Micro means 10^-6.
Induced emf = rate of change of flux. And flux = field*area
 

Thread 'Initial conditions for orbits around a wormhole'

Hi, I had an exam and I completely messed up a problem. Especially one part which was necessary for the rest of the problem. Basically, I have a wormhole metric: $$(ds)^2 = -(dt)^2 + (dr)^2 + (r^2 + b^2)( (d\theta)^2 + sin^2 \theta (d\phi)^2 )$$ Where ##b=1## with an orbit only in the equatorial plane. We also know from the question that the orbit must satisfy this relationship: $$\varepsilon = \frac{1}{2} (\frac{dr}{d\tau})^2 + V_{eff}(r)$$ Ultimately, I was tasked to find the initial...
View full post »

Thread 'Help to convert units of a simple formula'

The value of H equals ## 10^{3}## in natural units, According to : https://en.wikipedia.org/wiki/Natural_units, ## t \sim 10^{-21} sec = 10^{21} Hz ##, and since ## \text{GeV} \sim 10^{24} \text{Hz } ##, ## GeV \sim 10^{24} \times 10^{-21} = 10^3 ## in natural units. So is this conversion correct? Also in the above formula, can I convert H to that natural units , since it’s a constant, while keeping k in Hz ?
View full post »

Similar threads

I Railgun: Significant magnetic field where projectile is?
Replies
8
Views
2K
I How relative is the magnetic field of a current carrying conductor?
Replies
4
Views
1K
Multipole ring magnet generator
Replies
9
Views
3K
I Numerical calculations of a railgun yielded disappointing results
Replies
4
Views
957
Magnetic flux of sliding bar on rails
Replies
1
Views
2K
Rod on rails in a magnetic field
Replies
5
Views
2K
Vertical circuit under a magnetic field
Replies
3
Views
1K
B Magnetic field and generator power output
Replies
5
Views
2K
Changing cross-sectional area effect on induced current
Replies
10
Views
5K
I What causes the magnetic force in a uniform magnetic field?
Replies
20
Views
2K

Hot Threads

Recent Insights

Back
Top