All Questions
30
questions
5
votes
4
answers
2k
views
Temperature distribution in a current carrying conductor
A rod of uniform cross section and composition is connected across a battery. Let the middle part of the rod(when divided into three equal parts) is heated uniformly.
A book says that the temperature ...
CommunityBot
- 1
1
vote
1
answer
105
views
If a downed powerline contacts the metal chassis of my car, can I touch any metal parts of my car while sitting inside of it?
consider the following situation. I parked my car underneath some high-voltage lines – let’s say 380 kV-lines. Suddenly, one of the lines breaks in the middle due to a storm and one end of the (still ...
- 11.7k
0
votes
2
answers
1k
views
Why can't we use a slip ring instead of a split ring in a dc motor?
I've been taught that in a dc electric motor a split ring is used to connect the two ends of the rotating coil to two carbon brushes so that
The wire does not get twisted and
The current passing ...
5
votes
4
answers
987
views
If an electron is repelled by another electron how is it that we get an electric current?
As we know that an electric current is a flow of electric charge in a circuit, and in electric circuits, the charge carriers are often electrons moving through a wire.
Now, since we know that like ...
0
votes
4
answers
71
views
Do you "lose" electricity when you course it through subpar conductors?
Imagine I had a basic circuit - say the classic 9V battery on one end, a couple of wires, and a little light bulb on the other.
Of course, in a real world example those wires would probably be ...
- 73.7k
4
votes
1
answer
23k
views
Why don't you get electrocuted when you jump and touch an electric fence?
I've read that you won't get electrocuted if you jump and touch an electric fence because you aren't closing the circuit with the ground. Which is also why birds don't get electrocuted when they're ...
- 119k
4
votes
6
answers
2k
views
Electric current definition
I'm trying to understand electric current. Some resources say that it is the flow of charge, and other resources say that it is the quantity of charge that passes through a cross-sectional area over a ...
- 207k
1
vote
2
answers
766
views
What force moves electrons through a conductor that is rotating in a magnetic field [closed]
Is it the magnetic force ( F= qv +B ) or the electromagnetic force (F= q(E+vxB) that acts on the electrons of a conductor that is moving in a magnetic field?
Thanks.
CommunityBot
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3
votes
1
answer
698
views
Does the shape of a wire affect the electric current in it in any way?
Say we have a straight wire connected across two terminals carrying electricity between them. If everything is kept the same (voltage across the two terminals, resistance of the wire, etc.) will there ...
- 1,896
0
votes
1
answer
63
views
GENERATION OF CURRENT DUE TO ELECTRON FLOW
Why do flow of electrons generate current? whenever an electrons flows through a wire it generates electricity why does it actually happen?
- 207k
1
vote
2
answers
924
views
Does electric current create positive ions while flowing through a conductor?
As the conduction electrons are free to move randomly, i.e they are not restricted to a particular atom, then why don't these atoms get positive charge due to loss of these conduction electrons?
- 1
1
vote
1
answer
94
views
Does the electron in wire too move because of voltage difference?
When we talk about electricity through a circuit because of a battery it is said that the electrons from negative terminal travel to positive terminal of the battery.
I can't help but imagine about ...
- 207k
1
vote
2
answers
206
views
Resistance Being Proportional to Length And Its Relation to Magnitude of Current
"Resistance of an electrical conductor is proportional to it length"
The intuitive explanation I found in many articles was that the greater the length of the conductor, such as a wire, the greater ...
- 1
0
votes
1
answer
121
views
When AC electricity is generated, how does the current flow? [duplicate]
I have read multiple different versions of how AC current flows in our power lines. How does the current flow? Is the energy just photonics waves passing through electrons that vibrate or are ...
- 95.5k
0
votes
2
answers
148
views
Resistance in special cases
I am curious-
I know that resistance doubles when length does, and that resistance would be halved if cross sectional area was doubled -
But is there such a case of special conditions where It ...
- 207k