Magnetostatics - Magnetic Fields - Currents
14 important questions on Magnetostatics - Magnetic Fields - Currents
What is the current in a wire?
What happens when you reverse the signs of q and v? In what direction do charges move?
Charges move in the direction opposite of the electric current. However, we often pretend that its the positive charges that move.
What is a line charge? [lambda]![]()
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What is current? Scalar or vector?
What does a neutral wire consist of?
How does the magnetic force on a segment of current-carrying wire look like?
From (vxB)dq=(vxB)
Next to that the current in magnitude is constant along the wire and in that case I comes outside the integral.
How would we describe charge flowing over a surface?
How can we also define the surface current density?
Does magnetic force on the surface current have limitations?
How would we describe charge flow distributed throughout a three-dimensional region?
How can the current density J also be defined?
What form would the magnetic force of a volume current take?
Is charge conserved? Can we change up the theory?
Is there an easy equation to showcase the conservation of charges?
This equation is called the continuity equation, and it is the precise statement of local charge conservation. The theory of conserved charges applies to any volume, we can conclude the following:
This equation is called the continuity equation, and it is the precise statement of local charge conservation.
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