2 solenoids: emf and frequency

In summary, the conversation discusses studying a circuit in AC and using a function generator to set a waveform. A solenoid is used with a small solenoid inside, and the question is posed about a possible relationship between frequency and emf induced on the second solenoid. The conversation concludes by mentioning a loosely-coupled transformer and the impact of the coupling coefficient on the voltage of the secondary solenoid.
  • #1
bznm
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I'm studying a circuit in AC. I use a function generator and set a waveform. I have a solenoid and I put a small solenoid inner it. Could you tell me if there is a relation between frequency and emf inducted on the second solenoid?
 
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  • #2
bznm said:
I'm studying a circuit in AC. I use a function generator and set a waveform. I have a solenoid and I put a small solenoid inner it. Could you tell me if there is a relation between frequency and emf inducted on the second solenoid?

What you describe is basically a loosely-coupled transformer. That is, a transformer with a coupling coefficient K less than 1. The frequency out will equal the frequency in. The voltage on the secondary solenoid will depend on the value of the coupling coefficient K.

See for example: http://www.tpub.com/neets/book2/5f.htm

:smile:
 

FAQ: 2 solenoids: emf and frequency

What is the emf of a solenoid?

The emf (electromotive force) of a solenoid is the voltage produced when there is a change in magnetic flux through the solenoid. It is typically measured in units of volts (V).

How is the emf of a solenoid calculated?

The emf of a solenoid can be calculated using the equation E = -N(dΦ/dt), where E is the emf, N is the number of turns in the solenoid, and dΦ/dt is the rate of change of magnetic flux through the solenoid.

What factors affect the emf of a solenoid?

The emf of a solenoid is affected by the number of turns in the solenoid, the strength of the magnetic field, and the rate of change of magnetic flux through the solenoid.

How does the frequency of a solenoid affect its emf?

The frequency of a solenoid affects its emf by changing the rate of change of magnetic flux through the solenoid. A higher frequency will result in a higher emf, while a lower frequency will result in a lower emf.

How can the frequency of a solenoid be changed?

The frequency of a solenoid can be changed by adjusting the speed of the source of the changing magnetic field, such as a rotating magnet or an alternating current. It can also be changed by varying the number of turns in the solenoid or the strength of the magnetic field.

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