- #1
yabb dabba do
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dV/dx=E
E*q=F=m*a
dq/dt=I
v/R=I
Say you have a situation where you have a constant DC current in a conductor. Applying the above equations to this situations seems to lead to a contradiction, so I’m confused.
-So if you have constant DC current then that indicates dq/dt is a constant
-If dq/dt is a constant the velocity of the electrons is not changing
-However in order to have a current you need a voltage difference and if you have a voltage difference you have an electric field.
-If you apply an electric field applied to electrons, you have a non-zero force on them. The force indicates that the electrons are accelerating.
-If the electors are accelerating this indicates their velocity is not constant, and hence dq/dt would not be a constant, which contradicts the first statement above.
Where did I go wrong in my reasoning?
E*q=F=m*a
dq/dt=I
v/R=I
Say you have a situation where you have a constant DC current in a conductor. Applying the above equations to this situations seems to lead to a contradiction, so I’m confused.
-So if you have constant DC current then that indicates dq/dt is a constant
-If dq/dt is a constant the velocity of the electrons is not changing
-However in order to have a current you need a voltage difference and if you have a voltage difference you have an electric field.
-If you apply an electric field applied to electrons, you have a non-zero force on them. The force indicates that the electrons are accelerating.
-If the electors are accelerating this indicates their velocity is not constant, and hence dq/dt would not be a constant, which contradicts the first statement above.
Where did I go wrong in my reasoning?