2
votes
Accepted
Electric force is zero in a solenoid
If you do account for resistance then there will be charge accumulated on the windings to create the $E$-field associated with the (presumably small) voltage drop between the terminals, like in this ...
- 4,912
2
votes
Electric force is zero in a solenoid
I'll do the one dimension wire (which can be coiled or not). The length is parameterized by $x$, a Cartesian coordinate.
As stated, it has a current:
$$ j(x) = j_0 $$
and that means there is an ...
- 35.4k
1
vote
How is a steady current maintained in case of motional EMF if net force on electrons is zero?
if they are slowed down or are sent in random directions once they encounter resistance in the wire then how should a steady current keep flowing?
If the rod is isolated, only then electric charge ...
- 39k
1
vote
How is a steady current maintained in case of motional EMF if net force on electrons is zero?
Indeed there is no current in the rod once the force on the electrons become zero.
While the rod was entering in the magnetic field , the magnetic force acted on the free electrons to produce a ...
- 378
1
vote
Accepted
Visualization of resistance
What does a resistor do in an electrical circuit?
The resistance of a conductor limits the amount of current that can flow in the conductor for a given potential difference.
I have been told to ...
- 73.7k
1
vote
Visualization of resistance
I have been told to think of water flowing in a pipe and which has a narrow part
I don't think the narrow pipe is a good analogy of a resistor.
In simple fluid dynamics the water in the narrow part ...
- 56.4k
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