Tagged Questions
2
votes
2answers
85 views
How to find $\tau$ in this circuit?
1)
2)
I know, that
$$
τ = \frac{L}{R}
$$
but what is $R$ in this formula? It seems to be the total resistance, but how to find it in 1) and 2)?
2
votes
1answer
43 views
Circuit Loop Law Doubt
In a circuit with a solenoid/inductor and a resistor and a battery .
Books say that $\Sigma \Delta V=0$ around a closed loop . That means work done by electrostatic field per unit charge is $0$ ...
0
votes
0answers
22 views
Current distribution in inductors
I have been trying to figure out how current is distributed in a circuit with multiple inductors. I could not find any specific info regarding the topic but I guess it is similar to the case with ...
2
votes
1answer
95 views
How we approach RLC circult from RLGC model?
In the text, it introduces a practical model to investigate a transmission line (like BNC cable), it considers the transmission line has resistive $R$, inductance $L$, conductance $G$ and capacitance ...
0
votes
1answer
92 views
Inductively coupled DC circuit
The circuit under consideration has two inductively coupled loops, one with a DC battery, inductor, and resistor in series. The other loop has two inductors, one inductively coupled to the first, the ...
2
votes
1answer
388 views
Effective resistance of inductor
In a lab experiment, we connected a simple circuit: an AC voltage source, connected (in series) to a variable resistor and an inductor. We measured the current in the circuit, and the voltage that ...
1
vote
2answers
140 views
Can inductance or resistance be negative or “infinite”?
Since the potential different or voltage drop is positive (am I allow to say voltage drop or potential difference in the presence of a changing current?), the current flows from right to left since ...
1
vote
1answer
317 views
Non-conservative Electric Field
I was watching this video from Walter Lewin and while watching these two videos, I noticed there is a "contradiction" in what he is doing. All links direct you exactly to where he begins, so you don't ...
36
votes
7answers
2k views
Cyclist's electrical tingling under power lines
It's been happening to me for years. I finally decided to ask users who are better with "practical physics" when I was told that my experience – that I am going to describe momentarily – prove that I ...
