All Questions
9
questions
1
vote
6
answers
330
views
Why is current defined as $dQ/dt$ even though it is not defined as the rate of 'change' of flow of charges?
I do not understand this definition. $dQ/dt$ represents the rate of CHANGE of charge flow at an instant even though current is defined as only the charge flow per unit time.
- 39
0
votes
2
answers
68
views
What is a current?
I am confused. One GCSE video on YouTube says it is a flow of electrons around a circuit; while, my textbook says it is a flow of charge around a circuit, carried by electrons. Since charge can be ...
-2
votes
3
answers
312
views
What is meant by Electrical resistance and Electrical resistivity? Some different thoughts needed
The Electrical resistance is defined as the oppose of flow of charge by a material(wire for example). Also $R = \rho l/A$
What i think is that "charge" here actually means the magnitude of ...
0
votes
2
answers
95
views
Can someone please explain the difference between an electric charge and electric current? [closed]
Well I understand the definition my question was that we measure charge by calculating 6.24 *10 powers 28 in one second then what is electricity if it is the rate of flow of charge is,t it's the same ...
- 11
0
votes
3
answers
82
views
Electricity vs Current [closed]
BACKGROUND: Electromagnetism has been the hardest concept in physics that I do not understand at all back in my old school. Now, I just started studying robotics which requires the basic understanding ...
0
votes
1
answer
103
views
What is the meaning of resistance?
I am a 10th grade student and I have a little trouble in knowing what is resistance?
I know this might be a silly question for others but My thinking of resistance is that it opposes the flow of ...
- 470
1
vote
2
answers
764
views
Electric current at a point
When learning about electric current in circuits, I have learned that at each point in the circuit there is a current associated with it which is defined as the charge per unit time passing through ...
- 399
0
votes
0
answers
757
views
Definition of "Electric current intensity" for a spatially distributed conductor(Will it transform to some sort of "Current flux"?)
Assume a long linearly distributed conducting body which its height and width isn't comparable to its length. In classical theory of electromagnetism we can deduce most of the charges/electrons ...
- 872
0
votes
3
answers
2k
views
The standard definition of current
The book says current is the rate of flow of charge per unit time, but I don't understand whether it is rate of flow of charge through a single cross-sectional area per unit time or the entire amount ...
