All Questions
25
questions
1
vote
1
answer
77
views
Inductors in AC circuit
We know that the current varries in an a.c. circuit if we connect an inductor to the circuit when the current is maximum the inductor oppose the current and tries to decrease the current and when ...
- 31
0
votes
3
answers
1k
views
Current in an AC circuit with only an inductor
In an AC circuit with only an inductor, we have a current that lags behind the EMF. So, at time 0 we have zero emf and max current. But in realty, how is this possible? How can we have a current ...
- 329
0
votes
1
answer
2k
views
Relation between Voltage and EMF of a solenoid
I've been working an a senior design project for school that uses solenoids, I needed to characterize the solenoids since they came from china and didn't have a datasheet. One of the tests that I ...
- 1
1
vote
3
answers
4k
views
Crossover frequency in RC filter circuits
When the resistor's voltage equals the capacitor's voltage, crossover frequency is defined to be $1/(RC)$. I am aware that below crossover frequency, there will be a low pass area where only low ...
- 81
2
votes
1
answer
11k
views
Is the number of turns in a loop part of the magnetic flux?
In all both my physics textbooks, the number of loops $N$ is left out of the equation for magnetic flux $\phi_B = \int_s \vec B \cdotp\hat n dA$ and only when calculating the Emf induced by an ...
- 411
6
votes
3
answers
4k
views
Why do Capacitor Inductor circuits Oscillate instead of reaching equilibrium?
When the capacitor is fully charged there is a potential difference between its poles and that creates a current.
This current would create a magnetic field that is changing in the Inductor (because ...
- 411
0
votes
4
answers
1k
views
Spherical magnet inside a solenoid
When passing a bar magnet through a long solenoid why is it that the induced emf when the magnet is in the middle of the solenoid is zero? And if a spherical magnet is put inside the solenoid, will ...
- 27
2
votes
1
answer
7k
views
Transformers - Why more coils in second coil causes more voltage [duplicate]
I am learning about magnetic induction and transformers.
I have coil1 which uses AC to create an oscillating magnetic field.
I have ...
- 153
0
votes
1
answer
297
views
Self inductance & time constant formula
Is this a correct formula for calculating the induced EMF of a wire after the current stabilizes/ or while it stabilizes in the beginning of a DC circuit?
What is the difference between the above ...
- 1,110
0
votes
1
answer
188
views
EMF due to self-inductance? [closed]
I'm trying to calculate the induced $-V$ in a DC circuit when current starts to flow, and reaches it's maximum value.
The inductance of the conductor is 1000nH it carries large amounts of current (...
- 1,110