Solve Electricity Numericals with Expert Help: Hydrogen Discharge Example

  • Thread starter Thread starter saltrock
  • Start date Start date
  • Tags Tags
    Electricity
AI Thread Summary
The discussion revolves around solving a hydrogen discharge electricity numerical problem involving current calculation. The current is determined using the formula Q=I x t, where the charge of electrons is essential for the calculation. Participants suggest looking into the concept of 'Conventional Current flow' to understand the direction of current. There is also a recommendation to post homework questions in a designated help section for more focused assistance. Overall, the thread emphasizes the importance of understanding basic electrical principles to solve the problem effectively.
saltrock
Messages
67
Reaction score
0
electricity numericals! help needed!

When a sufficiently high voltage is applied between two electrodes in a gas, the gas ionises. Electrons move towards the positive electrodes,and positive ions move towards the negative electrode.

a) what is the current in a hydrogen discharge if, in each second, 4.4 x 10^15 electrons and 1.5x 10^15 protons move in opposite directions past a cross-section of the tube?
b)what is the direction of the current? :confused:
 
Physics news on Phys.org
This sounds like a homework problem.

Tell us what your thoughts are on the problem.
 
a) Start with Q=I x t
You should know the charge on an electron.

b) Look up 'Conventional Current flow'.

c) Post HWK in the HWK help section.
 
thanx for your help.
 
No problem.

:-)
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

How does a simple circuit work?
Replies
12
Views
1K
Mechanisms Involved When Charging a Battery
Replies
10
Views
1K
Confused about direction of electric field
Replies
7
Views
3K
Types of energy in a gas discharge tube
Replies
2
Views
2K
How Do You Calculate Current in a Hydrogen Discharge Tube?
Replies
1
Views
5K
Conceptual Issue RE: electric potential difference
Replies
1
Views
1K
Van der Graaf Generator: Charge, Potential and Redesign Questions
Replies
8
Views
2K
Discharged electrodes and charges: electric slingshot
Replies
2
Views
2K
Movement of electron in an electric field
Replies
10
Views
7K
Plasma ball radio-frequency energy
Replies
3
Views
3K

Hot Threads

Recent Insights

Back
Top